1, 45 - High-quality carbon structural steel is the most commonly used medium-carbon tempered steel
main features: The most commonly used medium-carbon tempered steel has good comprehensive mechanical properties, low hardenability, and is prone to cracks during water quenching. Small parts should be tempered with and , while large parts should be normalized. Application examples: It is mainly used to manufacture high-strength moving parts, such as turbine impellers and compressor pistons. shafts, gears, racks, worms, etc. Pay attention to preheating the welded parts before welding and eliminate stress annealing after welding.
2, Q235A (A3 steel) - the most commonly used carbon structural steel
Main features: It has high plasticity, toughness and welding performance, cold stamping performance, as well as certain strength and good cold bending performance. Application examples: Widely used in parts and welded structures that are generally required. Such as pull rods, connecting rods, pins, shafts, screws, nuts, rings, brackets, bases, building structures, bridges, etc. that are not under much force.
3, 40Cr - one of the most widely used steel types, belongs to alloy structural steel
Main features: After tempering, it has good comprehensive mechanical properties, low temperature impact toughness and low notch sensitivity, good hardening, high fatigue strength can be obtained when oil is cooled, complex shape parts are prone to cracks when water is cooled, cold bending plasticity is medium, tempering or tempering good cutting processability, but poor welding properties are easy to produce cracks. It should be preheated to 100-150℃ before welding, generally used in tempering state, and carbon nitrogen co-permeability and high-frequency surface quenching can also be carried out. Application examples: After tempering and tempering, it is used to manufacture parts with medium speed and medium load, such as machine tool gears, shafts, worms, spline shafts, thimble sleeves, etc., after tempering and high-frequency surface quenching, it is used to manufacture parts with high hardness and wear resistance on the surface, such as gears, shafts, spindles, crankshafts, mandrels, sleeves, pins, connecting rods, screws and nuts, air intake valves, etc., after quenching and medium temperature tempering, it is used to manufacture parts with heavy load and medium speed impact, such as oil pump rotors, sliders, gears, spindles, sleeves, etc., after quenching and low temperature tempering, it is used to manufacture parts with heavy load, low impact, wear resistance, such as worms, spindles, shafts, sleeves, etc., and after carbon and nitrogen co-permeability, it is then manufactured with large size and high low-temperature impact toughness, such as shafts, gears, etc.
4, HT150——Gray cast iron
Application examples: gear box body, machine tool bed body, box body, hydraulic cylinder, pump body, valve body, flywheel, cylinder head, pulley, bearing cover, etc.
5, 35——Common materials for various standard parts and fasteners
Main features: appropriate strength, good plasticity, high cold plasticity, and good welding properties. Local upset and wire drawing can be locally upset and brushed in cold state. Low hardenability, use after normalization or tempering, for example: Suitable for manufacturing small section parts and can withstand large loads: such as crankshafts, levers, connecting rods, hooks and loops, various standard parts and fasteners.
6, 65Mn—Commonly used spring steel
Application examples: small size various flat, round springs, seat cushion springs, spring springs, spring springs, and spring rings, valve springs, clutch springs, brake springs, cold coiled coil springs, clutch springs, etc.
7, 0Cr18Ni9 - the most commonly used stainless steel (US steel number 304, Japanese steel number SUS304)
Features and applications: As stainless heat-resistant steel, such as food equipment, general chemical equipment, it was originally used for industrial equipment.
8, Cr12——Commonly used cold work mold steel (US steel number D3, Japanese steel number SKD1)
Characteristics and applications: Cr12 steel is a widely used cold work mold steel, belonging to the high carbon and high chromium type of Letenite steel. This steel has good hardenability and good wear resistance; since the carbon content of Cr12 steel is as high as 2.3%, the impact toughness is poor, easy to crack, and it is easy to form uneven eutectic carbides; because of its good wear resistance, Cr12 steel is mostly used to make cold punch dies, punches, cutter dies, cold heading dies, cold extrusion dies, drill sleeves, gauges, drawing dies, , stamping dies, wire rubbing dies, deep drawing dies, and cold press dies for powder metallurgy.
9, DC53 - Commonly used imported cold work mold steel in Japan
Characteristics and applications: High strength and toughness cold work mold steel, Japan Datong Special Steel Co., Ltd. manufacturer steel number. After high temperature tempering, it has high hardness, high toughness and good wire cutting ability. Used for precision cold stamping mold , stretch mold, wire rub mold, cold punch mold, punch, etc. 10, SM45 - ordinary carbon plastic mold steel (Japanese steel number S45C)
10, DCCr12MoV - wear-resistant chromium steel
domestically produced. Compared with Cr12 steel, Mo and V are added, the carbide unevenness is improved. MO can reduce carbide segregation and improve hardenability, and V can refine grains. Toughness. This steel has high hardenability, and can be completely hardened at a cross-section of less than 400mm. It can still maintain good hardness and wear resistance at 300~400℃. It has high toughness than Cr12. It has small volume changes during quenching, and has high wear resistance and good comprehensive mechanical properties. Therefore, it can be used to make various molds with large cross-sections, complex shapes, and withstand large impacts, such as ordinary tensile dies, punching dies, punching dies, blanking dies, edge cutting dies, rolling dies, wire drawing dies, cold extrusion dies, cold cutting shears, circular saws, standard tools, measuring tools, etc.
11, SKD11—Tough chromium steel
Japan Hitachi Co., Ltd. Technically improves the casting structure in the steel and refines the grains. The toughness and wear resistance of Cr12mov are improved, and the service life of the mold is extended.
12, D2—High carbon and high chromium cold work steel
—Produced in the United States. It has high hardenability, hardening, wear resistance, good high temperature oxidation resistance, good corrosion resistance after quenching and polishing, and has small deformation of heat treatment. It is suitable to manufacture various cold work molds, tools and measuring tools that require high precision and long life, such as tensile dies, cold extrusion dies, cold shear knives, etc.
13, SKD11 (SLD) - undeformable toughness high chromium steel
Japan Hitachi Co., Ltd. Due to the increase in MO and V content in the steel, the casting structure in the steel is improved, the grains are refined, and the carbide morphology is improved. Therefore, the strength and toughness of the steel (flexural strength, deflection, impact toughness, etc.) is higher than that of SKD1 and D2, the wear resistance is also increased, and it has higher temper resistance. Practice has proved that the life of this steel mold is improved compared with Cr12mov. Moulds with high requirements are often manufactured, such as tensile molds, molds that impact grinding wheel plates, etc.
14, DC53 - High Toughness High Chromium Steel
Japan Datong Co., Ltd. The heat treatment hardness is higher than SKD11. After high temperature (520-530) tempering, it can reach 62-63HRC high hardness, and DC53 exceeds SKD11 in terms of strength and wear resistance. The toughness is twice that of SKD11. The toughness of DC53 rarely occurs in cold work mold manufacturing, which greatly improves the service life. The residual stress is small. Residual stress is reduced after high temperature turnover. Because cracks and deformation after wire cutting are suppressed, the machinability and abrasiveness exceed SKD11. It is used in precision stamping dies, cold forging, deep drawing dies, etc.
15, SKH-9——Universal high-speed steel with wear resistance and toughness,
, produced by Hitachi Co., Ltd., used in cold forging dies, strip cutters, drill bits, reamers, punches, etc.
16, ASP-23——Power metallurgy high-speed steel
Swedish production. Carbide distribution is extremely uniform, wear-resistant, high toughness, easy to process, and stable heat treatment dimensions. It is used in punches, deep-tightening dies, drilling dies, milling cutters and shearing inserts and other long-life cutting tools.
17, P20 - the size required for general plastic mold
US production. Electrically etchable operation. Factory pre-hardened HB270-300. quenching hardness HRC52.
18, 718——High-required plastic molds
——Swedish. Especially electrocorrosion operation. Pre-hardened in factory state. HB290-330. Quenching hardness HRC52
19, Nak80——High mirror, high-precision plastic molds
——Produced by Japan Datong Co., Ltd.. Pre-hardened in factory state HB370-400. Quenching hardness HRC52
20, S136——Anti-corrosion and mirror-polished plastic molds
——Swedish. Pre-hardened in factory state HB＜215. Quenching hardness HRC52.
21, H13—usually, die casting die
is commonly used for aluminum, zinc, magnesium and alloy die casting. Hot stamping die, aluminum extrusion die,
22, SKD61—high-level die casting die
0, produced by Hitachi Co., Ltd., Japan, through electrospray resolving technology, the service life is significantly improved compared to H13. Hot stamping die, aluminum extrusion die,
23, 8407—high-level die casting die
Sweden. Hot stamping die, aluminum extrusion die.
24, FDAC - Added sulfur to enhance its easy cutting
Factory pre-hard hardness 338-42HRC, can be directly engraved and processed without quenching or tempering. It is used for small batch molds, simple molds, various resin products, sliding parts, mold parts with short delivery time. Zipper molds, glasses frame molds
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