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Taizhou Longlide Metal Products Co., Ltd. recently announced that the company successfully completed the delivery of an important order, laying a solid foundation for the company's future development. It is reported that this order comes from an internationally renowned automobile manufacturer and involves the production of a large number of automobile parts. As an important supplier to the automobile manufacturer, Longlide Metal Products Co., Ltd. has won the trust of its partners with its high-quality products and excellent services. The delivery of this order not only marks the recognition of Longlide Metal Products Co., Ltd.'s competitiveness in the field of auto parts, but also further consolidates the company's position in the industry. The successful delivery of this order will bring considerable revenue to the company and provide a strong impetus for the company's future development. Longlide Metal Products Co., Ltd. is an enterprise specializing in the production of metal products, with advanced production equipment and technical teams. The company is committed to providing customers with high-quality, high-performance metal products to meet the needs of different industries. In the past few years, the company has continuously increased its investment in technology research and development and quality management, and continuously improved the competitiveness and market share of its products. The successful delivery of Longli De Metal Products Co., Ltd. benefits from the company's continuous focus and efforts. The company always adheres to customer-centeredness, continuously improves product quality and service levels, and has won recognition and praise from many customers. The company will continue to adhere to the business philosophy of "quality first, customer first", continue to innovate and make progress, and provide customers with better products and services. As an enterprise in Taizhou City, the successful delivery of Longlide Metal Products Co., Ltd. has further promoted the development of the local economy. The company's development has not only led to an increase in job opportunities, but also provided strong support to the local supply chain industry. This once again proves Taizhou City`s status and potential as a manufacturing center. In the future, Longlide Metal Products Co., Ltd. will continue to be committed to technological innovation and quality improvement, continue to expand market share, and strengthen cooperative relationships with customers. The company will take this successful delivery as an opportunity to further strengthen internal management, improve production efficiency, and provide customers with better products and services. I believe that with the company's efforts, the future of Longli De Metal Products Co., Ltd. will be brighter.

Stainless steel balls have the characteristics of uniform particles, moderate hardness, high strength, and good toughness, which are safe, reliable, and have good technical effects, enabling processed products to highlight the metallic essence. Therefore, it has an increasingly widespread application trend in the industrial field. Firstly, one of the main application industries of stainless steel shot is the casting industry. We should know that usually the castings produced by casting enterprises need to be polished, and shot blasting cleaning machinery is a professional machinery used in this field. He uses different models based on different workpieces, and will not damage the original appearance and performance of the cast parts. In the mold industry, stainless steel shot products are often used. In fact, many molds are currently produced by casting, and the molds themselves require smoothness. Shot blasting cleaning machines can polish according to different requirements without damaging the original appearance and performance of the molds. So at this point, the shot blasting cleaning machine came in handy. When producing steel and steel plates in steel mills, stainless steel pellets are often used for treatment to improve the quality and sales of the steel. In addition, it has also been applied in shipyards. For example, the steel plates used in shipyards have rust, which can affect the quality of shipbuilding. It is impossible to use manual rust removal, which would require a large workload. This requires machines to remove rust to ensure the quality of shipbuilding. The use of a series of methods can be resolved. In automobile manufacturing plants, according to production requirements, many steel plates and castings require polishing treatment, while also ensuring the strength and original appearance of the steel plates. The appearance of the castings must be clean and beautiful. Therefore, stainless steel pellets are required. In addition, stainless steel balls are also widely used in hardware factories, electroplating factories, motorcycle parts factories, valve factories, and bearing factories. Cast Steel Shot, Magnetic Polishing Needles, Stainless Steel Shot

Stainless steel shot may seem inconspicuous, but in fact, its functions are very powerful. Most workpieces, including stainless steel parts, aluminum alloy die castings, and alloy copper parts, will be applied to stainless steel shot during surface blasting, sandblasting, shot blasting treatment, shot blasting forming, finishing, strengthening, matte, calibration, paint removal, and corrosion removal. Do you know the production method of this product? So far, the production methods of stainless steel balls can be divided into two types. One type is forged stainless steel balls obtained through smelting, atomization, and cooling, which is currently recognized as a method. Another type involves cutting and rounding stainless steel wire to obtain stainless steel pellets. No matter which production method is used, there are clear production specifications for reference. Whether in China or abroad, by comparison, the majority of manufacturers choose the second method to produce stainless steel balls and apply it to different industries with different characteristics. Cast Steel Shot, Magnetic Polishing Needles, Stainless Steel Shot

Stainless steel shot is widely used for surface shot blasting treatment of non-ferrous metal castings such as aluminum alloys and zinc alloys, as well as stainless steel castings. It can highlight the luster of metal materials and will not cause rust or discoloration on the surface of castings. After polishing with stainless steel shot, the castings have become smooth, uniform, and rust free, with a matte effect. No further cleaning, pickling or other processes are required. The stainless steel shot is in the shape of a round bead with good fluidity, which is conducive to internal circulation, ensuring that this spray polishing process can efficiently and effectively cover up the surface of the casting, and can cover up defects on the surface of the workpiece such as scratches, bumps, and mold cracking.. After multiple mechanical tests, it has been found that stainless steel shot has a long service life due to its non pore characteristic. After processing, the surface of the workpiece is bright and rust free, making it an ideal shot blasting tool for non ferrous alloy castings and stainless steel precision castings. Cast Steel Shot, Metal Abrasive, Stainless Steel Shot

Aluminum Cut Wire Shot, Cast Steel Shot Stainless steel shot may seem inconspicuous, but in fact, its functions are very powerful. Most workpieces, including stainless steel parts, aluminum alloy die castings, and alloy copper parts, will be applied to stainless steel shot during surface blasting, sandblasting, shot blasting treatment, shot blasting forming, finishing, strengthening, matte, calibration, paint removal, and corrosion removal. Do you know the production method of this product? So far, the production methods of stainless steel balls can be divided into two types. One type is forged stainless steel balls obtained through smelting, atomization, and cooling, which is currently recognized as a method. Another type involves cutting and rounding stainless steel wire to obtain stainless steel pellets. No matter which production method is used, there are clear production specifications for reference. Whether in China or abroad, by comparison, the majority of manufacturers choose the second method to produce stainless steel balls and apply it to different industries with different characteristics.

Cast Steel Shot, Magnetic Polishing Needles, Stainless Steel Shot Shot peening is a shot peening technique that is different from shot peening. The purpose of shot blasting is to remove oil, scale, rust and machining burrs on the surface of the workpiece. The shot peening of the gear surface mainly relies on the impact of high-speed projectiles on the surface of the part, causing it to undergo elastic-plastic deformation, thereby producing favorable changes such as residual compressive stress, work hardening and microstructure refinement, so as to improve the bending fatigue strength of the gear. And contact fatigue strength, it is to improve the anti-occlusion ability of the gear, reduce the noise of the gear and improve the service life of the gear by more than 30%. 1. Mechanism and function of shot peening 1. Shot peening treatment can improve the stress distribution on the surface of parts The residual stress after shot peening comes from the inhomogeneous plastic deformation of the surface layer and the phase transformation of the metal structure, among which the inhomogeneous plastic deformation is the main one. After shot peening, plastic deformation in the form of a large number of pits occurs on the metal surface, the surface dislocation density greatly increases, and subgrain boundaries and grain refinement also appear. As shown in Figure 1. Part of the retained austenite on the surface of the gear after shot peening will turn into martensite, and compressive stress will be generated due to volume expansion during phase transformation, so that the retained austenite field on the surface will change towards a larger compressive stress direction, so Improve the fatigue strength of the gear. Through shot peening, it can eliminate heat treatment stress, remove surface oxide skin, improve the notch sensitivity of parts, and convert the residual stress that is prone to failure of parts into compressive stress, effectively restricting the generation and expansion of crack sources. Improve the fatigue life of parts. 2. Shot peening can form a high compressive stress layer on the surface of the workpiece Because shot peening increases the surface compressive stress and significantly improves its fatigue performance, it is more effective for workpieces that withstand high-frequency fatigue loads. The residual compressive stress formed by shot peening can offset part of the applied load. During shot peening, small-sized spherical steel shots hit the surface of the workpiece to form compressive stress. The impact of each shot will cause a certain plastic deformation of the metal, and finally the surface cannot be completely restored and a permanent compressive stress state is formed. As a surface strengthening process, shot peening can form residual compressive stress on the surface equivalent to 55%~60% of the ultimate tensile strength of the material, and the surface of the workpiece is just the place where cracks are easy to initiate. For carburized and quenched gears, the formed compressive stress can reach 1177~1725MPa, which can greatly improve the fatigue performance. The depth of the compressive stress layer is a function of the peening intensity (or peening energy) and increases with shot size or shot velocity. 2. Shot peening process parameters The shot peening process has high requirements on the shape, size and hardness of the projectile. The shot peening process is controlled by shot peening strength and surface coverage, and the surface strengthening effect is detected by residual stress and fatigue tests. Shot peening process parameters include projectile material, projectile diameter, projectile velocity, projectile flow rate, injection angle, injection distance, shot peening time and coverage, etc. The change of any one of these parameters will affect the shot peening intensity to varying degrees, that is, the effect of strengthening . (1) Arc height test piece The standard ALMEN arc height test piece is a special gauge for comprehensive evaluation of shot peening process parameters. It is made of No. 70 spring steel and has three specifications, code-named N, C, and A, respectively, and is used in three occasions with different shot peening intensity requirements. (2) Arc height curve The arc height curve is the change of the shot peening arc height value of the same test piece with the shot peening time (or the number of shot peening times) under the condition of other process parameters being fixed, which marks the curve of the arc height value-time relative relationship. (3) Shot peening intensity Shot peening intensity is usually determined by the arc height value method, the main point of which is to use a certain spring steel test piece to reflect the shot peening effect by detecting the shape change after the shot peening intensity. The specific operation is to use the Almen test piece (arc height test piece , the general hardness is 44~50HRC), fixed on the fixture, after shot peening, the test piece is removed, and then the height of the bending arc is measured with a checking tool (such as an Almen measuring instrument). Another inspection method for shot peening strength is residual stress detection, that is, the detection of residual stress on workpieces after enhanced shot peening, and the specific inspection method is X-ray diffraction method. (4) Surface coverage The coverage rate refers to the ratio of the indentation area of the projectile to the surface area of the sprayed workpiece after the surface of the workpiece is shot peened. Usually expressed as a percentage. The main point of the measurement is to enlarge the Almen test piece about 50 times after shot peening, and measure the indentation area of the projectile. Because it is difficult to guarantee 100% coverage, 98% coverage is actually defined as full coverage. For product patterns requiring 300% coverage, this is typically achieved with three times the peening time required to achieve 98% effective coverage. (5) Projectile quality The quality of the projectile has a great influence on the strengthening effect. The general rule is: the diameter of the projectile is small, the residual stress on the surface of the workpiece is high, but the strengthening layer is shallow; the diameter of the projectile is large, the residual stress on the surface of the workpiece is low, but the strengthening layer is deep; the hardness of the projectile is high , the shot peening intensity is also high; the shot diameter increases, the shot peening intensity also increases; the shot velocity increases, the shot peening intensity, the surface compressive stress and the depth of the strengthening layer increase. (6) Shot peening time Under the condition that other shot peening process parameters remain unchanged, the best strengthening effect can be obtained only when the shot peening reaches the "saturation" time or twice the "saturation" time. Usually, insufficient strengthening time is more unfavorable than excessive strengthening time. Therefore, when it is found that the strengthening time is lower than the specified time, supplementary strengthening can be performed on the workpiece again. 3. Application of shot peening technology 1. Improve the surface hardness of carburized gears Example 1: The shot peening equipment of the FAW Heat Treatment Branch Factory adopts the TR5SVR-1 stress shot peening equipment made in Germany. The shot peening process is as follows: steel shot with a diameter of ￠0.8mm is used, the shot peening time is 9 minutes, and the shot peening speed is 2800r/min. The gear material is 22CrMoH steel, which has been carburized, quenched and tempered. After the shot peening treatment, the surface structure of the gear has been refined, and the retained austenite content of the surface layer is about 10% lower than that of the workpiece without shot peening treatment. Within the range of 0.15mm from the surface, the change amount is relatively Obviously; the surface hardness of the gear after enhanced shot peening treatment is increased by 0.5~2HRC. 2. Increase the residual compressive stress on the gear surface and improve the surface microstructure Example 2: The second-speed driven gear of Santana car transmission has been carburized, quenched and tempered. The impeller type shot peening machine is used for shot peening, the shot peening speed is 2900r/min, and the shot hardness is 57HRC. The results of the shot peening test are as follows. (1) The microhardness of the surface layer of shot peened parts is significantly improved, which is the result of the combined effect of high residual compressive stress, work hardening and microstructure change (refinement), and the significant reduction of retained austenite also contributes to the increase in hardness. contributed. (2) Due to the shot peening, the retained austenite in the surface layer of the workpiece is changed to martensite, which can be used to improve the surface hardness. The martensitic needles are obviously smaller and denser than those without shot peening, which plays a role in refining the martensite substructure. It is conducive to the improvement of residual stress, thereby improving the fatigue performance of gears. 3. Improve the fatigue life of gears Example 3: FAW used the enhanced shot peening process to conduct a fatigue life test on the first gear of the "Jiefang" brand automobile transmission, which significantly improved the fatigue life of the gear. In order to improve the fatigue life of the "Jiefang" brand active helical gear, a large arc hob is used to cut the teeth. Increasing the gear fillet can increase the life of the active helical gear from 208,300 times to 695,400 times. Increase its fatigue life to 3.477 million times. The gears are shot peened after carbonitriding to improve the contact fatigue strength. For example, SCM420H steel gears are carbonitrided through ammonia gas, etc. With the increase of nitrogen content, ΔHV (hardness drop) increases, that is, the tempering resistance performance is improved, and the tempering temperature can reach 300°C. The problem of contact fatigue damage of conventional carburized gear tooth surface of automatic transmission AIT for automobiles is solved. 4. Projectile requirements After the heat treatment of the gears, most of the surface hardness has reached 58~63HRC. When performing shot peening, the shot peening treatment should be higher than or equal to the surface hardness to ensure the residual compressive stress on the surface and the surface strengthening layer. depth. In addition, the selection of the projectile size should ensure that the root of the gear is strengthened. In the process of shot peening, the tooth root with a small radius often cannot be shot peened because the diameter of the projectile selected is too large. To do this, ensure that the projectile diameter is less than half the root radius. Since the quality of the steel shot has a great influence on the strengthening effect, the national standard has given strict specifications on the metallographic structure, chemical composition, minimum density and hardness deviation of the steel shot. During the use of projectiles, it is necessary to replenish new projectiles in time, and the qualified quantity of projectiles should be kept above 80%. Therefore, different specifications of screens can be selected for control to ensure the effect of shot peening. Because the broken projectile has sharp corners, it is easy to produce many tiny sharp cuts on the surface of the workpiece, thereby reducing the strengthening effect. Therefore, broken projectiles should be screened out during the production process. Shot size selection principles: ① When there is a requirement for surface roughness, smaller steel shots should be used as much as possible. ② When the workpiece has inner and outer fillets and grooves, the diameter of the projectile should be smaller than the radius of the inner and outer fillets and the width of the groove. ③Ensure that the spherical shape and size of the projectile are uniform. 5. The steel shot adopts 1. BPS reinforced steel shot is a product developed by Aobote. It adopts high-quality strips, heat-treated prestressed wire drawing, CNC cutting, and passivated round shot technology to produce a new generation of surface cleaning and strengthening high-quality shot materials. HRC: 40-50 respectively /50-55/55-63 steel shot not only has uniform hardness, uniform size and long service life, but also does not generate dust and is not broken during production. It can be called green and environmentally friendly steel shot. It is mainly used for spraying gears and spring frames. Pill strengthening treatment, etc.

Stainless steel balls come in different types and can also exert different effects in practical applications. So far, stainless steel shot has been widely used in aluminum alloys, zinc alloys, and stainless steel plates. It is usually used as a surface shot blasting solution for rare metal castings and stainless steel castings, which is more conducive to highlighting the luster of metal materials and does not cause rust or discoloration on the surface of castings. Usually, after being shot blasted with stainless steel shot, the surface of the casting can be seen to be smooth, uniform, and rust free, with a matte effect, without the need for any further cleaning, pickling, or other processes. From the perspective of performance characteristics, the stainless steel shot has a round bead shape and excellent flowability, which is beneficial for internal circulation. Therefore, it provides excellent standards for efficient and high coverage surface treatment of the casting surface during spray machining, which can cover defects such as scratches, scratches, and mold cracking on the surface of the workpiece. In summary, based on the analysis of practical application effects, stainless steel shot has its own excellent characteristics, which not only has a long service life, but also can make the surface of the workpiece bright and rust free after production. It is an ideal shot blasting material for non-ferrous alloy castings and stainless steel precision castings. In practical applications, the use of stainless steel shot includes many aspects or can play a cleaning role, including shot blasting cleaning, shot blasting cleaning, die casting cleaning, casting shot blasting cleaning, forging shot blasting cleaning, forging shot blasting cleaning, casting sand cleaning, steel plate cleaning, steel plate cleaning, H-shaped steel cleaning, and steel structure cleaning. In addition, the use of stainless steel balls can also achieve rust removal, reinforcement, and other effects. At the same time, it can also be used for shot peening, shot blasting, sand blasting treatment, and pre treatment of cast steel shot. Stainless steel shot can be used for coating pretreatment, spraying pretreatment, surface pretreatment, etc.

Cast Steel Shot,Metal Abrasive, Stainless Steel Shot In general, the quality of stainless steel shot is largely determined by its material and shape: 1: We must first choose which type of stainless steel shot is most suitable for ourselves. Firstly, we need to consider our product's pursuit of surface color, and secondly, we need to consider our product's production process, which requires anodizing, electroplating, and painting? It is still the biggest factor to consider which material to use when directly shipping the finished product after shot blasting and sandblasting. If it comes to testing materials, it's best to entrust it to a professional (such as consulting us). After all, in the era of mixed fish and dragon, it's not easy to buy the material you really want. A strong magnet and a bottle of medicine are essential; 2: We distinguish quality by observing the shape of stainless steel balls. We place the stainless steel balls on the table and then observe whether the shape of the stainless steel balls is standard, whether it is diamond, cylindrical, or spherical. When the stainless steel shot is too fine, we can rub it with our hands (or observe it through a high-power mirror) to feel if it is smooth. If there are any scratches on our hands, it proves that the shape of the stainless steel shot is not very regular and the quality is not good. The sandblasting effect of stainless steel balls with a spherical shape will make the product feel more delicate, and the most crucial point is that stainless steel balls with a spherical shape will be more durable, which is beneficial for reducing production costs.

Stainless steel balls come in different types and can also play different roles in practical applications. So far, stainless steel shot has been widely used in aluminum alloys, zinc alloys, and stainless steel plates. It is mainly used for surface shot blasting treatment of non-ferrous metal castings and stainless steel castings, which is more conducive to highlighting the luster of metal materials and will never cause rust or discoloration on the surface of castings. Usually, after the shot blasting treatment of stainless steel shot, it can be seen that the surface of the casting is smooth, uniform, and rust free, with a matte effect, without the need for any further cleaning, pickling, and other processes. From the perspective of performance characteristics, the stainless steel shot has a round bead shape and excellent fluidity, which is conducive to internal circulation. Therefore, it provides excellent conditions for efficient and high coverage surface treatment of the casting surface during spray machining, and can cover up defects on the workpiece surface such as scratches, bumps, and mold cracks. In summary, based on the analysis of practical application effects, stainless steel shot has its own excellent characteristics, which not only has a long service life, but also can make the surface of the workpiece bright and rust free after processing. It is an ideal shot blasting material for non-ferrous alloy castings and stainless steel precision castings. In practical applications, the use of stainless steel shot includes many aspects, such as its cleaning function, including shot blasting cleaning, shot blasting cleaning, die casting cleaning, casting shot blasting cleaning, forging shot blasting cleaning, forging shot blasting cleaning, casting sand cleaning, steel plate cleaning, steel plate cleaning, H-shaped steel cleaning, and steel structure cleaning. In addition, the use of stainless steel balls can also achieve rust removal, strengthening, and other effects. In addition, it can also be used for shot peening, shot blasting, sand blasting treatment, and pre treatment of cast steel shot. Stainless steel shot can be used for coating pretreatment, coating pretreatment, surface pretreatment, etc.

Cast Steel Shot, Metal Abrasive, Stainless Steel Shot From the current market situation, we can find that there are many different types of shot blasting materials, such as ordinary steel shot, aluminum oxide emery, glass bead and stainless steel shot. So, what is unique about stainless steel shot among these different types of shot blasting materials? Below, we will analyze this issue and hope to assist us. In fact, stainless steel shot has been widely used, mainly in the spraying and polishing treatment of the surface of copper, aluminum, zinc, stainless steel and other workpieces. After processing, these metals can exhibit their original metallic nature, giving them a very shiny and matte appearance. In addition, the workpiece obtained after using this spray polishing treatment no longer requires the process of acid cleaning and rust removal, which is both convenient and environmentally friendly. In addition, compared to other materials, stainless steel pellets also have outstanding wear resistance. According to statistics, the consumption of each ton of aluminum alloy castings during polishing treatment is still lacking in kilograms. This has obvious advantages compared to other data. For example, ordinary steel shot is only half of it, while glass bead is only one tenth of it. In addition, stainless steel balls also have a series of advantages, such as their composition being very uniform, the purity of particle size being high, the surface structure being fine, shiny, non rusting, moderate hardness, and long service life. Overall, this information can be regarded as the best choice of abrasive for descaling, deburring, and visually intact machining. In summary, stainless steel shot materials do have many advantages, and in practical use, they can also save users a lot of time and financial resources. I hope that after understanding these contents, we can have a deeper understanding of stainless steel balls.

Cast Steel Shot, Metal Abrasive, Stainless Steel Shot I don't know if everyone knows that stainless steel balls actually have a lot of performance. Of course, when we operate and use stainless steel balls, we should also check whether their performance and effectiveness meet our requirements. Of course, we should also know what wear resistance means for stainless steel balls, which cannot be ignored. 1. What are the characteristics of stainless steel balls Simply put, stainless steel shot is actually a material used for the production of metal workpieces. Of course, its performance is relatively good. Not only is the particle size relatively average, but the effect we use it to process is also relatively good. This naturally improves the endurance of the workpiece. When using stainless steel balls, we should also check if their uniformity meets the requirements and ensure that their hardness is relatively high. In this way, we should also pay attention to their elasticity, otherwise we cannot improve the efficiency of stainless steel balls, which is also something we should consider. 2. Wear resistance of stainless steel shot If you are a friend who uses stainless steel balls, you should know that for stainless steel balls, their wear resistance is still a concern for us. Of course, we should also ensure that he has a certain degree of impact resistance to leave, so that he can use it for a relatively long time. Of course, we should also do a good job in protecting him, so that he can use more places. During the process of using stainless steel balls, we should also know their performance, and we should not allow them to rust. Of course, we should pay more attention in the entire work environment. After reading our introduction to stainless steel balls, I believe everyone should also know some content about them. Of course, if we cannot guarantee its performance, there will inevitably be many problems, which we should pay attention to.

Cast Steel Shot, Metal Abrasive, Stainless Steel Shot Recently, the "Chromium-Manganese-Nickel-Nitrogen Austenitic Stainless Steel Plate and Steel Strip Series Standard" recommended by the China Iron and Steel Association and led by the Metallurgical Industry Information Standards Research Institute won the 2022 Group Standard Application Demonstration Project of the Ministry of Industry and Information Technology. As a representative of the domestic professional stainless steel association, Guangdong Stainless Steel Materials and Products Association was invited to participate in the preparation of the standard. According to reports, T∕CISA045-2020 chromium-manganese-nickel-nitrogen austenitic stainless steel hot-rolled steel plate and steel strip, T/CISA046-2020 chromium-manganese-nickel-nitrogen austenitic stainless steel cold-rolled steel plate and steel strip two standards are drafted by the Metallurgical Industry Information Standards Institute, Qingtuo Group Co., Ltd., Shanxi Taigang Stainless Steel Co., Ltd., Baosteel Desheng Stainless Steel Co., Ltd., Guangxi Beigang New Materials Co., Ltd., Angang Lianzhong (Guangzhou) Stainless Steel Co., Ltd., Henan Jinhui Stainless Steel Industry Group Co., Ltd., Guangdong Shuangxing New Materials Group Co., Ltd., Guangxi Liugang Zhongjin Stainless Steel Co., Ltd., Fujian Wuhang Stainless Steel Products Co., Ltd., Shandong Taishan Iron and Steel Group Co., Ltd., Lianyungang Huale Alloy Group Co., Ltd., Hongwang Investment Group Co., Ltd., Guangdong Stainless Steel Materials and Products Association, International Nickel Association, China Ferroalloy Industry Association and other units participated in the compilation. It is reported that in the past 10 years, chromium-manganese stainless steel has developed rapidly in the domestic market due to its high strength and low price, and is widely used in building decoration, kitchenware, sanitary equipment and appliances, household appliances, transportation and equipment and components in the industrial sector, and its market share has increased year by year. China's current stainless steel cold-rolled strip standard GB/T3280 and hot-rolled strip standard GB/T4237 as early as 2007 version of the cancellation of 201, 202 and other three grades, in the 2015 edition still did not restore chromium-manganese grade, since 2007 to the present chromium-manganese stainless steel production and circulation has been no national and industry standards to follow, this kind of products for many years in accordance with enterprise standards and supply technical conditions to produce and circulate, there is serious market confusion, uneven quality, Obvious differences in ingredients and other phenomena, and even the appearance of fake and shoddy "so-called 200" stainless steel, which seriously affects the healthy and orderly development of the industry. With the deepening of supply-side structural reform and the further improvement of stainless steel industry concentration, in order to further standardize the order of stainless steel industry, it is of great significance to formulate two standards: T/CISA045-2020 "Chromium-manganese-nickel-nitrogen austenitic stainless steel hot rolled steel plate and steel strip" and T/CISA046-2020 "Chromium-manganese-nickel-nitrogen austenitic stainless steel cold rolled steel plate and steel strip". The release and implementation of the two standards solves the problem that chromium-manganese austenitic stainless steels have no standard to rely on for a long time. Production enterprises use two standards of stainless steel, because to meet the PREN not less than 10.0 requirements, in the composition design, Cr content should be as high as possible, conducive to improve the corrosion resistance of steel, at the same time need to continuously reduce Mn content, in the steel to add N elements, to N generation Ni, on the one hand to reduce the use of Ni resources, in line with the requirements of China's economic development, save resources, on the other hand, can effectively improve austenite stability, to ensure that steel has good comprehensive mechanical properties. The implementation and application of standards also provide stainless steel consumers with high-quality stainless steel products materials and improve the service life of stainless steel products. The formulation and implementation of the two group standards have not only attracted great attention in the stainless steel products industry, but also been widely recognized in chromium-manganese austenitic stainless steel manufacturers.

Among metal abrasive products, many hardware products are widely used with their own characteristics. Compared with steel shot, steel grit and other products, steel shot products are the best type of metal surface treatment. Generally speaking, the life of steel wire cut shot is 15-30% longer than that of cast steel shot, because the steel wire cut shot has no pores and looseness, and the uniformity of the structure is better. The steel wire cut shot is mostly used for precision parts, and the stainless steel wire cut shot is mostly used for stainless steel parts And aluminum castings, because it will not pollute the castings after shot blasting, and it is more wear-resistant. The high-hardness steel wire cut pellets strengthen the blades, cylinders and connecting rods used in aero-engines and diesel engines.

Cast Steel Shot, Metal Abrasive, Stainless Steel Shot Steel shot is a kind of spherical particles made of special materials through special heat treatment. First, high-quality steel blocks are melted, and then the molten molten steel is formed into particles by high-pressure water jet, and the formed shot body is reheated to purify and homogenize. Re-quenched. The product features of the steel shot introduced below: The quenched shot body is dried and reheated and tempered in a furnace to reach the applicable hardness. The tempered steel shot is sorted through a mechanical screen into different grades according to the SAE standard for shot peening equipment. . Moderate hardness, strong toughness, impact resistance, long service life, up to 2000-2900 times, good resilience, fast cleaning speed, low consumption, no broken, fast cleaning speed, good technical effect. The cleanliness of the metal surface treated by this product can reach GB/T8923-1989; the surface roughness can reach Rz=10--150μm. When processing hard metals, the hardness can be increased to hrc57-62. They have good toughness, and their service life is several times that of cast iron shot, and they are widely used. The high-quality alloy steel grit of steel shot has high density, few defects, narrow particle size distribution range, good metallographic structure and superior mechanical properties after heat treatment, and the toughness, crush resistance and fatigue resistance of steel shot are greatly improved. Low consumption and significant economic benefits. Steel shot can be widely used in surface strengthening and surface finishing of shot peening mechanical parts before painting of steel structure parts. This increases the specific surface area of the metal surface, improves the surface adhesion of the coating after painting, and has very significant economic benefits. It is the most advanced and ideal metal abrasive for shot blasting cleaning and strengthening at home and abroad.

Our friends who often come into contact with Stainless Steel Shot know that there are many types of steel shot, and many manufacturers are now purchasing more and more Hi-Carbon Steel Cut Wire Shot. Today we will briefly share the advantages of Hi-Carbon Steel Cut Wire Shot. Hi-Carbon Steel Cut Wire Shot can improve the quality of shot blasting cleaning and significantly improve the cleaning efficiency. Taking conventional spring cleaning and gear cleaning as an example, the cleaning efficiency of using Hi-Carbon Steel Cut Wire Shot can be increased by more than 50% compared with that of ordinary steel shot. High carbon steel shot has stronger toughness, is not easy to break, long service life, strong impact resistance, can reach shot peening strength in a faster and shorter time, and strengthened steel shot can better maintain shot peening for a long time strength. The consumption during use is low, and the service life is 3-4 times that of the same specification.

Cast Steel Shot, Metal Abrasive, Stainless Steel Shot Steel grit is the most cost-effective material among industrial metal abrasives, so how to identify the quality of steel grit? We believe that high-quality steel grit should meet the following characteristics: 1. Steel grit has the characteristics of moderate hardness, strong toughness, impact resistance, and can be used repeatedly for several times. 2. The steel grit has a long service life, good resilience, strong adhesion, fast cleaning speed, low sand consumption, no breaking, high brightness of the cleaned workpiece, efficient effect on the surface of the workpiece, and has the effect of cleaning the surface quickly. The surface quality of the workpiece is good and can be used for a long time 3. The cleanliness of the metal surface treated with steel grit can reach the international standard. There are many specifications of steel grit, and different specifications have a longer service life for processing different parts and play different roles. To choose the quality of steel grit, it is necessary to compare in terms of hardness, physical properties of the product and different specifications. A good product has a longer service life. When used, it can create more value.

Cast Steel Shot, Metal Abrasive, Stainless Steel Shot With the rapid development of society, the application of zinc alloy die-casting products is more and more extensive. Many zinc alloy die-casting factories often encounter the phenomenon of sandblasting and peeling. Longlived has been producing sandblasting for many years. Combined with the die-casting experience that sandblasting is required for connector die-casting, the measures to solve the sandblasting problem of zinc alloy die-casting products are summarized. 1. Before die casting, inspection should be strengthened, and parts with serious defects such as water marks, pores, and pinholes on the surface of the product should be reduced to ensure the compactness of die castings. 2. Every time the mold completes a batch of orders, it needs to save the mold cleaning and maintenance. 3. If it is true that the die-casting product has cold streaks, sweep the surface with soft nylon to reduce the peeling phenomenon. 4. The choice of sandblasting sand is very important. If the material of the embryo is not too hard, the selection of brown corundum can reduce the peeling. This also tells our friends, not only to learn and accumulate knowledge of various die-casting techniques in daily life, but also to pay attention to the quality of sandblasting and brown corundum. Both aspects are strictly controlled, so that problems can be found in the process. Find solutions in order to make the company prosperous. The above is from Longlived's experience summed up based on customer problems. For other sandblasting and brown corundum questions, please feel free to contact us!

Cast Steel Shot, Metal Abrasive, Stainless Steel Shot Steel grit is often used for the treatment of metal surfaces, and the products treated with steel grit can meet national standards. Steel grit is one of the commonly used abrasives and is made from selected raw material scrap steel. Steel grit is currently an ideal high-quality material for cleaning, blasting, rust removal and strengthening at home and abroad. High-quality steel grit products have moderate hardness, strong toughness, and impact resistance. They can be used repeatedly for several times. At the same time, they have long service life, good resilience, strong adhesion, fast cleaning speed, low sand consumption, no breakage, and high brightness for cleaning workpieces. Technical effect Good and many other features. This is also the advantage of high-quality steel grit. The treatment effect of inferior steel grit is greatly reduced, so how to check whether the steel grit is qualified? 1. Hardness. The steel grit is too soft, which will slow down the cleaning speed and reduce work efficiency. During sandblasting, too soft steel grit cannot generate suitable residual stress, and the force of low-hardness sand cannot be compensated by increasing the impact time. If the hardness is too high, it will produce an unsatisfactory surface morphology, increase the probability of sand breaking, make the consumption too high, and wear more equipment and increase equipment maintenance costs, so proper hardness is also critical. Second, the microstructure. The microstructure of steel grit must be able to resist deformation and reduce energy loss and increase or decrease fatigue life when acting on the working face. Tempered martensite is the most fatigue-resistant. In addition, brittle carbides must be reduced in the microstructure and microstructure, otherwise it will cause premature fracture of steel grit and increase the amount of use. 3. Chemical composition. Determines the microstructure of the steel grit and the effect of subsequent heat treatment. The carbon content should be moderate. Silicon and manganese can improve the strength and hardness of the steel grit, so it should be as high as possible. Sulfur and phosphorus are harmful elements, which are easy to make steel grit brittle and lead to premature rupture, so they should be kept as low as possible. 4. Fatigue life. Fatigue life is the ability of steel shot grit to resist breakage when applied to the work surface, and the abrasive with the longest fatigue life will be the most economical abrasive if it can transfer the proper amount of energy to cleaning. 5. Physical defects. The steel grit must contain as few physical defects as possible that would cause the abrasive to crack. Due to the production process used, there will always be certain such physical defects in steel grit. There must be corresponding processes in production to control to reduce the proportion of defective particles. The above is the whole content of the standard for testing the quality of steel sand, I hope it can be helpful to everyone.

Cast Steel Shot, Metal Abrasive, Stainless Steel Shot In recent years, the demand for steel shot has been increasing, and many people do not know the fields where steel shot can be used. Today, we will briefly talk about which fields steel shot can be used in. Steel structure construction enterprises: The steel structure needs to be derusted before use, which can meet the structural requirements stipulated by the state. The pass-through shot blasting machine adopts fully automatic cleaning, which does not require manual derusting, which saves labor costs and reduces pickling. Environmental Pollution. Shipyard: The steel plate of the shipyard has rust, which affects the quality of shipbuilding. Manual embroidery removal is used, which requires a lot of work and high labor costs. This uses machines to remove rust to ensure the quality of shipbuilding. Steel mill: The steel and steel plates produced by the steel mill have many burrs when they are just released, which affects the quality and appearance of the steel. These problems can be dealt with using a pass-through shot blasting machine. Automobile factory: According to the work requirements of the automobile factory, the steel plates and some castings used need to be polished, but the strength and original appearance of the steel plates cannot be damaged. The appearance of castings should be clean and beautiful. Due to the irregularity of auto parts, different polishing machines are required to complete it. Mold industry: Most of the molds are cast, and the mold itself needs to be smooth. The steel shot cleaning machine can be polished according to different requirements without damaging the original shape and performance of the mold. Bearing factory: The bearing is pressed by the mold, and the surface is relatively smooth. However, there are still some impurities or burrs in some parts, which also need to be cleaned. At this time, the shot blasting cleaning machine comes in handy. Foundry industry: The castings produced by general foundry companies need to be ground and polished, and shot blasting machinery is the professional machinery used in this regard. It uses different models according to different workpieces, and will not damage the original shape and performance of the casting. Steel shot will be used in the fields mentioned above.

Cast Steel Shot, Metal Abrasive, Stainless Steel Shot After the casting is produced, in order to achieve better use effect, the casting is generally shot blasted. Shot blasting is a cold treatment process, which is divided into shot blasting and shot blasting. Shot blasting, as the name suggests, is to remove impurities such as surface oxide scale to improve the appearance quality. Shot blasting is to use high-speed moving projectiles (60-110m/s) flow. Continuous impact strengthens the workpiece surface, forcing the target surface and surface layer (0.10-0.85mm) to undergo the following changes during cyclic deformation: 1. The microstructure is modified; 2. The non-uniform plastic deformation outer layer introduces residual compressive stress, and the inner surface produces residual tensile stress; 3. The outer surface roughness changes (Ra Rz). Effect: It can improve the fatigue fracture resistance of materials/parts, prevent fatigue failure, plastic deformation and brittle fracture, and improve fatigue life. But sometimes we will encounter the situation that the whole surface of the casting is blackened or there are obvious black marks and black spots in the part after shot blasting. On the surface, it can be removed, but it is difficult to handle if it has been immersed in the casting matrix. The reasons for this are: 1. Defects that existed before the shot peening brought by the die casting process: (1) Too much black oil is used in die casting; (2) Punch oil splashes when the mold is opened; (3) Paint splashes during die casting; 2. The product is placed for a long time or the temperature is humid, and the surface is corroded, moldy or dusty. 3. The dust removal device of the shot blasting machine fails, and the steel shot contains a lot of dust. 4. The operator did not wear gloves as required, and directly touched the surface of the casting after shot peening, resulting in fingerprints. 5. After the shot peening is placed for a long time, the surface is dusty or splashed with water and oil, and the environment is humid and oxidized. When the above situation occurs, corresponding measures should be taken: 1. Defects are not spread over the entire casting surface. Strengthen the control and management by the die-casting process. (1) It is black oil, the color is black; (2) is punch oil, the color is dark red; (3) It is a paint, with a light color on the surface of the casting with different colors; 2. After shot peening, the surface traces are shallow and cannot be removed because they have been immersed in the casting matrix. Strengthen the management of product placement, and it should not be too long. If it needs to be placed for a long time, it must be covered and protected and placed in a suitable environment; 3. The color of the entire casting surface is black and dark. Resume dust removal or replace with new steel shot; 4. The operator must be required to operate according to the operating instructions. Gloves must be worn. 5. The shot peening should be finished inspection, packing and storage as soon as possible. If it needs to be stored for a period of time, it must be strictly protected.