Steel grit

An abrasive made from chilled iron particles that force molten iron through a steam jet. This abrasive is used in the grinding barrel to grind rocks. Fundamental contents Steel grit and steel shot Characteristics of steel grit: moderate hardness, strong toughness, impact resistance, can be used repeatedly several times in a row, long life, good rebound, strong adhesion, fast cleaning speed, low sand consumption, no breakage, bright workpiece to be cleaned, good technical effect, The cleanliness of the treated metal surface reaches international standards. The surface roughness reaches 25--100um, thereby increasing the contact surface of the metal surface, improving the surface adhesion of the paint, and having very significant economic benefits for refining the metal surface and strengthening the metal structure. It is currently the most advanced at home and abroad. High quality material ideal for cleaning, blasting, rust removal and strengthening. The main properties of steel grit and steel shot: Steel grit: GB6485----86 Chemical composition: Carbon (C): 0.70～1.20% Manganese (Mn): 0.35～1.20% Silicon (Si): 0.40～1.20% Sulfur (S): ≤0.05% Phosphorus (P): ≤0.05% Hardness: 42～50HRC (399～509HV) Density: 7.45g/cm2 Metallographic structure: tempered martensite + dispersed carbides Hardness: 45---65HRC Density: 7.58g/cm3 Steel shot: GB6484-----86 Chemical composition: Carbon (C): 0.70～1.20% Manganese (Mn): 0.35～1.20% Silicon (Si): 0.40～1.20% Sulfur (S): ≤0.05% Phosphorus (P): ≤0.05% Hardness: 40----50HRC Density: 7.45g/cm3 Main purpose: remove scale and rust from large and medium-sized forgings or steel, etc. Steel shot, cast steel shot, commonly known as shot, steel grain, chromium-molybdenum alloy steel shot, is a substitute for cast iron shot and iron shot. It is used for drum type, chain type, hook type, crawler type, through type, turntable type, etc. Accumulation type, stepping type, trolley type shot blasting machine, shot blasting cleaning machine, shot blasting cleaning equipment, shot blasting machine, shot blasting, shot blasting equipment, sand blasting machine, sand blasting equipment, steel pretreatment production line, Metal abrasives in steel plate pretreatment production lines and steel structure pretreatment production lines. This product uses selected raw material scrap steel, adds rare metals and optimal proportions of alloys, is smelted in an electric furnace, and converted into steel particles through modern equipment production. It undergoes multiple electric heat treatments and automatic screening. In the process of the liquid metal forming steel particles , its chemical composition and particle size are strictly controlled to ensure that its mechanical properties meet various uses. The strictest quality management is carried out in every production link. The steel shot produced has a tight internal structure, is not easily broken, has uniform particle size distribution, has appropriate hardness, strong impact resistance and long life. Scope of application: shipbuilding, containers, stainless steel, casting, steel structure, engineering machinery, hardware, golf, wind power equipment 1. The material of alloy steel sand is chromium bearing steel, which contains high chromium (a rare metal) and has good hardenability. However, traditional steel sand is high carbon steel and does not contain chromium. The quenching temperature is generally high, so Very brittle. 2. Alloy steel sand is directly quenched from forged bearing steel and then broken into steel sand. There is no smelting process in the manufacturing process and there are no casting defects. It is an energy-saving and pollution-free product: traditional steel sand follows the procedure of "making sand before making pills". It must be smelted and has many casting defects. It is a product with high energy consumption and high pollution in the manufacturing process. 3. The structure of alloy steel sand is in the forged state, with high mechanical properties, angular shape and extremely sharp shape, while the cast steel sand is in the cast state, with a spherical arc surface, low efficiency, and the consumption is much higher than that of alloy steel sand. Main performance Specification grade: G240～G005; Microhardness: 390HV-530HV; 470HV-610HV; 570HV-710HV; ≥700HV Chemical composition: carbon: 0.8%-1.2%, manganese: 0.35%-1.2%, silicon: ≥0.4%, sulfur, phosphorus: ≤0.05%; Metallographic structure: tempered martensite or tempered troostite; Density ≥7.0g/cm3; The total amount of defects is ≤40%; Foreign impurities ≤1%; Moisture content ≤0.2%. The original standard GB6485----86 cast steel sand was abolished in 1993. Because the surface color of tempered iron sand appears uniformly blue after annealing, tempered iron sand is often used to pretend to be cast steel sand. The service life of the iron sand is only 50-400 times, and the rust removal effect of the iron sand is seriously reduced and seriously damages the interests of users. Others: Bainitic steel grit, chromium-molybdenum steel grit, and manganese steel grit on the market are all concepts promoted by manufacturers, because if 1% of metallic molybdenum is added, 10kg of metallic molybdenum needs to be added per ton of steel grit, which requires 4,000 yuan, while domestic iron sand currently sells for only about 3,000 yuan/ton. Steel shot steel grit usage range SS-2.5 SS-2.0 SG-2.5 SG-2.0 Sand cleaning, rust removal, oxide scale surface cleaning, etc. of large cast iron, steel castings, steel structural parts, large forgings, and heat treated parts SS-1.7 SS-1.4 SG-1.7 SG-1.4 SG-1.2 Sand cleaning of large and medium-sized castings, oxide scale removal of forgings and heat-treated parts, rust removal and surface strengthening of steel plates, steel sections and steel components. SS-1.2 SS-1.0 SG-1.0 SG-0.7 Sand cleaning of small and medium-sized castings, forgings, heat-treated parts, rust removal and strengthening of steel plates, steel pipes, steel sections and structural steel parts, surface treatment before plating and painting, and stone cutting. SS-0.8 SS-0.6 SG-1.0 SG-0.7 Sand cleaning for small castings, forgings, heat-treated parts, aluminum-copper alloy castings, steel plates and strips, steel pipes, etc. to remove oxide scale, surface strengthening of spring chains and grinding processing for stone cutting. SS-0.5 SS-0.3 SG-0.4 SG-0.3 Sand and rust removal, spring strengthening, and surface treatment before spraying of alloy castings, thin plates, strip steel, and small stainless steel castings to improve roughness and enhance adhesion. The main purpose 1. As a metallurgical deoxidizer and high temperature resistant material. 2. It can also be used for polishing and grinding hardware, glass, gemstones, jade, etc. Silicon carbide has four main application areas, namely: functional ceramics, advanced refractory materials, abrasives and metallurgical raw materials. At present, silicon carbide rough materials can be supplied in large quantities and cannot be regarded as high-tech products. However, the application of nano-scale silicon carbide powder with extremely high technical content cannot form economies of scale in a short time. 3. As an abrasive, it can be used to make abrasive tools, such as grinding wheels, whetstones, grinding heads, sand tiles, etc. 4. High-purity single crystal can be used to manufacture semiconductors and silicon carbide fibers.