1. 45——High-quality carbon structural steel, which is the most commonly used medium carbon quenched and tempered steel
Main features: The most commonly used medium-carbon quenched and tempered steel has good comprehensive mechanical properties, low hardenability, and is prone to cracks during water quenching. Small parts should be quenched and tempered, and large parts should be normalized.
Application example: 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 before welding and annealing for stress relief after welding.
2. Q235A (A3 steel) – the most commonly used carbon structural steel
Main features: It has high plasticity, toughness, welding performance, cold stamping performance, certain strength and good cold bending performance.
Application example: Widely used in parts and welded structures with general requirements. Such as pull rods, connecting rods, pins, shafts, screws, nuts, ferrules, brackets, machine bases, building structures, bridges, etc.
3. 40Cr – one of the most widely used steel types, belonging to alloy structural steel
Main features: After quenching and tempering treatment, it has good comprehensive mechanical properties, low temperature impact toughness and low notch sensitivity, good hardenability, high fatigue strength can be obtained when oil cooling, and parts with complex shapes are easy to Cracks occur, medium cold-bending plasticity, good machinability after tempering or quenching and tempering, but poor weldability, prone to cracks, should be preheated to 100-150°C before welding, generally used in quenched and tempered state, can also be used Carry out carbonitriding and high frequency surface hardening treatment.
Application example: After quenching and tempering, it is used to manufacture medium-speed and medium-load parts, such as machine tool gears, shafts, worms, spline shafts, thimble sleeves, etc. After quenching and tempering and high-frequency surface quenching, it is used to manufacture high-hardness, durable Grinding parts, such as gears, shafts, main shafts, crankshafts, mandrels, sleeves, pins, connecting rods, screw nuts, intake valves, etc., are used to manufacture heavy-duty, medium-speed impact parts after quenching and medium-temperature tempering Parts, such as oil pump rotors, sliders, gears, main shafts, collars, etc., are used to manufacture heavy-duty, low-impact, wear-resistant parts, such as worms, main shafts, shafts, collars, etc., after quenching and low-temperature tempering, carbon Nitriding is used to produce transmission parts with large size and high low-temperature impact toughness, such as shafts and gears.
4. HT150——Gray cast iron
Application examples: gear box, machine bed, box, 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, acceptable weldability. It can be partially upset and drawn in cold state. Low hardenability, use after normalizing or tempering.
Application example: It is suitable for the manufacture of small cross-section parts that can withstand large loads: such as crankshafts, levers, connecting rods, shackles, etc., various standard parts, fasteners.
6. 65Mn – commonly used spring steel
Application examples: various small-sized flat and round springs, cushion springs, spring springs, spring rings, valve springs, clutch reeds, brake springs, cold-rolled coil springs, circlips, etc. can also be made.
7. 0Cr18Ni9 – the most commonly used stainless steel (American steel number 304, Japanese steel number SUS304)
Features and applications: The most widely used as stainless heat-resistant steel, such as food equipment, general chemical equipment, and original energy industry equipment.
8. Cr12——commonly used cold work die steel (American steel type D3, Japanese steel type SKD1)
Features and applications: Cr12 steel is a widely used cold work die steel, which belongs to high carbon and high chromium ledeburite steel. The steel has good hardenability and good wear resistance; because the carbon content of Cr12 steel is as high as 2.3%, the impact toughness is poor, it is easy to be brittle, and it is easy to form uneven eutectic carbides; Has good wear resistance.
It is mostly used to manufacture cold stamping dies, punches, blanking dies, cold heading dies, punches and dies of cold extrusion dies, drill sleeves, gauges, wire drawing dies, and embossing dies that are subject to less impact load and require high wear resistance. , thread rolling board, deep drawing die and cold pressing die for powder metallurgy, etc.
9. DC53 – commonly used cold work die steel imported from Japan
Features and applications: High-strength and toughness cold-working die steel, the steel grade of Daido Special Steel Co., Ltd., Japan. After high temperature tempering, it has high hardness, high toughness, and good wire cutting performance.
Used for precision cold stamping dies, drawing dies, thread rolling dies, cold blanking dies, punches, etc. 10. SM45——Ordinary carbon plastic die steel (Japanese steel grade S45C)
10. DCCr12MoV – wear-resistant chromium steel
Made in China, the carbon content is lower than that of Cr12 steel, and Mo and V are added to improve the unevenness of carbides. MO can reduce carbide segregation and improve hardenability, and V can refine grains and increase toughness. This steel has high Hardenability, the cross section can be completely hardened below 400mm, and it can still maintain good hardness and wear resistance at 300~400°C. It has higher toughness than Cr12, and the volume change is small during quenching. It also has high wear resistance and wear resistance. Good comprehensive mechanical properties. Therefore, various molds with large cross-sections, complex shapes, and large impacts can be manufactured.
For example, ordinary drawing dies, punching dies, punching dies, blanking dies, trimming dies, rolling dies, wire drawing dies, cold extrusion dies, cold cutting scissors, circular saws, standard tools, measuring tools, etc.
11. SKD11 – ductile chrome steel
Produced by Hitachi, Japan. It technically improves the casting structure in steel and refines the grains. Compared with Cr12mov, it has improved toughness and wear resistance. It prolongs the service life of the mold.
12. D2——High carbon and high chromium cold work steel
Made in the United States. It has high hardenability, hardenability, wear resistance, high temperature oxidation resistance, good corrosion resistance after quenching and polishing, and small heat treatment deformation. It is suitable for manufacturing various cold work molds that require high precision and long life. , Knives and measuring tools.
Such as drawing die, cold extrusion die, cold shear knife, etc.
13. SKD11(SLD)——Non-deformation tough high chromium steel
Produced by Hitachi Co., Ltd. of Japan. Due to the increase of MO and V content in the steel, the casting structure in the steel is improved, the grains are refined, and the morphology of carbides is improved. Therefore, the strength and toughness of this steel (bending strength, deflection, impact toughness) etc.) is higher than SKD1, D2, wear resistance has also increased, and has higher tempering resistance. Practice has proved that the life of this steel mold is improved compared with Cr12mov.
It is often used to manufacture molds with high requirements, such as drawing molds, molds for impact grinding wheels, etc.
14. DC53 – high toughness high chromium steel
Produced by Daido Co., Ltd., Japan. The heat treatment hardness is higher than SKD11. After high temperature (520-530) tempering, it can reach 62-63HRC high hardness. In terms of strength and wear resistance, DC53 exceeds SKD11. The toughness is twice that of SKD11. The toughness of DC53 is in Cracks and cracks rarely occur in cold work mold manufacturing. The service life is greatly improved. The residual stress is small. The residual stress is reduced after high temperature. Because the cracks and deformation after wire cutting are suppressed. The machinability and abrasiveness exceed SKD11. Used in precision stamping dies, cold forging, deep drawing dies, etc.
15. SKH-9——General-purpose high-speed steel with high wear resistance and toughness
Produced by Hitachi Co., Ltd. of Japan. It is used for cold forging dies, strip cutters, drills, reamers, punches, etc.
16. ASP-23——Powder Metallurgy High Speed Steel
Produced in Sweden. Carbide distribution is extremely uniform, wear-resistant, high toughness, easy processing, and heat-treated dimensionally stable. Used for various long-life cutting tools such as punches, deep drawing dies, drilling dies, milling cutters and shearing blades. .
17. P20 – the size of plastic molds generally required
Made in the United States. It can be electro-eroded. The factory state is pre-hardened to HB270-300. The quenching hardness is HRC52.
18. 718——Highly demanding size plastic mold
Made in Sweden. Especially for electric corrosion operation. Pre-hardened HB290-330 in factory state. Quenched hardness HRC52.
19. Nak80——high mirror surface, high precision plastic mold
Produced by Daido Co., Ltd. in Japan. Pre-hardened HB370-400 in the factory state. Quenching hardness HRC52
20. S136——Anti-corrosion and mirror polishing plastic mold
Made in Sweden. Pre-hardened HB<215 in ex-factory state. Quenched hardness HRC52.
21. H13——commonly used die-casting mold
For aluminum, zinc, magnesium and alloy die-casting. Hot stamping die, aluminum extrusion die,
22. SKD61——Advanced die-casting mold
Produced by Hitachi Co., Ltd. of Japan, the service life is significantly improved compared with H13 through electric ballast remelting technology. Hot stamping die, aluminum extrusion die,
23. 8407——Advanced die-casting mold
Made in Sweden. Hot stamping dies, aluminum extrusion dies.
24. FDAC – Sulfur is added to enhance its machinability
The factory pre-hardened hardness is 338-42HRC, which can be directly engraved without quenching or tempering. It is used for small batch molds, simple molds, various resin products, sliding parts, and mold parts with short delivery times. Zipper molds, Glasses frame mold.
Post time: Feb-22-2023
