24 kinds of metal materials and their characteristics commonly used in machinery and mold processing （B）
10, DCCr12MoV-domestically made wear-resistant chromium steel.
Compared with Cr12 steel, the carbon content is lower, and with the addition of Mo and V, the uneven carbides are improved. MO can reduce carbide segregation and improve hardenability, and V can refine grains and increase toughness. This steel has high hardenability. It can be completely hardened when the cross-section is below 400mm, and it can still maintain good hardness and wear resistance at 300~400℃. It has higher toughness than Cr12, small volume change during quenching, and high wear resistance and good wear resistance. Comprehensive mechanical properties. Therefore, it is possible to manufacture various molds with large cross-sections, complex shapes, and withstand greater impact, such as ordinary drawing dies, punching dies, punching dies, blanking dies, trimming dies, hemming dies, wire drawing dies, cold Extrusion die, cold cutting scissors, circular saw, standard tools, measuring tools, etc.
11, SKD11-tough chromium steel
Produced by Hitachi, Japan. Technically improves the casting structure in steel and refines the grains. Compared with Cr12mov, the toughness and wear resistance are improved. The service life of the mold is prolonged.
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. , Tools and measuring tools, such as drawing dies, cold extrusion dies, cold shearing knives, etc.
13, SKD11 (SLD)-non-deformation toughness high chromium steel
Produced by Hitachi, Japan. Due to the increase in the content of MO and V in the steel, the casting structure in the steel is improved, the crystal grains are refined, and the carbide morphology is improved, so 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 longer than that of Cr12mov. Often manufacturing demanding molds, such as tensile molds, impact The mold of the grinding wheel, etc.
14, DC53-high toughness and high chromium steel
Produced by Datong, 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. Toughness is twice that of SKD11. The toughness of DC53 is in There are few cracks and cracks 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 the wire cutting process are suppressed. The machinability and abrasiveness exceed SKD11. Use Used in precision stamping dies, cold forging, deep drawing dies, etc.
15, SKH-9-general-purpose high-speed steel with wear resistance and high toughness
Produced by Hitachi, Japan. Used for cold forging dies, strip cutting machines, drills, reamers, punches, etc.
16, ASP-23——Powder metallurgy high speed steel
Made in Sweden. Very uniform carbide distribution, wear resistance, high toughness, easy processing, stable heat treatment size. Used for punches, deep drawing dies, drill dies, milling cutters and shear blades and other long-life cutting tools .
17, P20——Generally required size plastic mold
Produced in the United States. It can be operated by electro-erosion. The factory state is pre-hardened HB270-300. The quenching hardness is HRC52.
18, 718-high-demand large and small plastic molds
Made in Sweden. Especially for electro-erosion operation. Ex-factory state is pre-hardened HB290-330. Quenching hardness HRC52
19, Nak80-high mirror surface, high precision plastic mold
Produced by Datong, Japan. Pre-hardened HB370-400 in ex-factory state. Quenching hardness HRC52
20, S136——Anti-corrosion and mirror-polished plastic mold
Made in Sweden. Pre-hardened HB＜215. Quenching hardness HRC52.
21, H13——Ordinary common die-casting mold
Used for aluminum, zinc, magnesium and alloy die casting. Hot stamping die, aluminum extrusion die.
22, SKD61——Advanced Die Casting Mould
Produced by Hitachi, Japan, through electric ballast remelting technology, the service life is significantly improved than H13. Hot stamping die, aluminum extrusion die.
23, 8407-Advanced Die Casting Mould
Made in Sweden. Hot stamping die, aluminum extrusion die.
24, FDAC-added sulfur to enhance its machinability
The factory pre-hardened hardness is 338-42HRC, which can be directly engraved and processed without quenching and 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 mould.
