1, 45 -- high quality carbon structural steel, is the most commonly used carbon tempered steel
Main features: the most commonly used carbon tempered steel, good comprehensive mechanical properties, low hardenability, water quenching easy to crack.Small parts should be tempered, large parts should be normalized.Application examples: mainly used for manufacturing high strength moving parts, such as turbomachinery impeller, compressor piston.Shaft, gear, rack, worm, etc.Pay attention to preheat before welding, stress relief annealing after welding.
2. Q235A (A3 steel) -- the most commonly used carbon structural steel
Main features: high plasticity, toughness and welding performance, cold stamping performance, as well as certain strength, good cold bending performance.Application examples: widely used in general requirements of parts and welding structures.If force is not big pull rod, connecting rod, pin, shaft, screw, nut, ferrule, bracket, frame, building structure, bridge and so on.
3. 40Cr -- one of the most widely used steels, belonging to alloy structural steels
Main features: after tempering treatment, has the good comprehensive mechanical properties, low temperature impact toughness, and low notch sensitivity, good hardenability, oil cooling can get higher fatigue strength, water-cooled complex shape parts easy to generate crack, plastic medium, cold bending tempered or quenched and tempered after cutting workability is good, but the weldability isn't good, easy to produce cracks, should be preheated to 100 ~ 150 ℃ before welding, generally used in the quenched and tempered state, also can undertake carbonitriding and high-frequency surface hardening treatment.Application, for example: after used in the manufacture of modified treatment weeken the speed, the load of the parts, such as gear, shaft, worm, spline shaft, thimble set, such as high frequency surface after quenching tempering and used in the manufacture of high surface hardness, wear resistance parts, such as gear, shaft, shaft, crankshaft, spindle, sleeve, pin, connecting rod, screw nut, inlet valve, etc., after quenching and tempering temperature in the parts used in the manufacture of heavy, medium speed impact, such as oil pump rotor, slider, gear, shaft, sets of ring, etc., used in the manufacture of reloading after quenching and low temperature tempering, low impact, wear-resistant parts, such as worm, such as main shaft, shaft, sets of ring,Carbonitriding after the manufacture of larger size, low temperature impact toughness higher drive parts, such as shaft, gear, etc.
4. HT150 -- gray cast iron
Examples: gear box, machine bed, box, hydraulic cylinder, pump body, valve body, flywheel, cylinder head, belt wheel, bearing cover, etc.
5, 35 -- common materials for various standard parts and fasteners
Main features: suitable strength, good plasticity, high cold plasticity, good weldability.Local upsetting and drawing can be done in cold conditions.Low hardenability, normalizing or tempering after application examples: suitable for manufacturing small section parts, can bear a large load of parts: such as crankshaft, lever, connecting rod, hook ring, etc., all kinds of standard parts, fasteners.
6. 65Mn -- spring steel in common use
Application examples: small size of a variety of flat, round spring, cushion spring, spring spring, can also be made of spring ring, valve spring, clutch spring, brake spring, cold coil coil spring, spring, and so on.
7. 0Cr18Ni9 -- most commonly used stainless steel (USA steel 304, Japanese steel SUS304)
Properties and applications: the most widely used as stainless heat resistant steel, such as food equipment, general chemical equipment, originally used in industrial equipment.
8. Cr12 -- commonly used cold working die steel (American steel D3, Japanese steel SKD1)
Properties and applications: Cr12 steel is a widely used cold working die steel, a high carbon and high chromium type of leitstenitic steel.The steel has good hardenability and good wear resistance;Because the carbon content of Cr12 is as high as 2.3%, the impact toughness of Cr12 steel is poor, brittle and brittle, and it is easy to form heterogeneous eutectic carbides.Cr12 steel because of good wear resistance, it is mainly used to manufacture the cold stamping die, punch, blanking die, cold heading die, cold extrusion die punch and die, drill sleeve, gauge, drawing die, stamping die, drawing die and cold pressing die for powder metallurgy.
9. DC53 -- commonly imported cold work die steel from Japan
Characteristics and applications: high strength and toughness cold working die steel, Japan datong special steel (plant) manufacturer's steel.High temperature tempering with high hardness, high toughness, good linear cutting.10, SM45 -- common carbon plastic die steel (Japanese steel code S45C)
10. DCCr12MoV -- wear-resistant chromium steel
Domestic. The Cr12 carbon steel is low, and joined the Mo and V, uneven carbide improves, Mo can reduce carbide segregation and improve the hardenability, V can refine the grain size increase toughness. This steel has high hardenability, cross section can be completely hardening under 400 mm, and in 300 ~ 400 ℃ can still maintain good hardness and wear resistance, the Cr12 has high toughness, volume change when quenching is small, and high wear resistance and good comprehensive mechanical properties. So you can make cross section is large, complex shape, undergo large impact of all kinds of mold, such as normal stretching die, punching die, punching die, blanking die, blanking die, rollEdge dies, wire drawing dies, cold extrusion dies, cold cutting scissors, circular saws, standard tools, gauges, etc.
11. SKD11 -- malleable chromium steel
Hitachi plant production. Improved casting structure in steel, refined grain, improved toughness and wear resistance compared with Cr12mov, and extended the service life of the mold.
12. D2 -- high carbon and high chromium cold made steel
Made in USA. It has high hardenability, hardenability, wear resistance, high temperature oxidation resistance, good corrosion resistance after quenching and polishing, small deformation after heat treatment, suitable for manufacturing all kinds of high precision, long life cold working die, tool and measuring tool, such as tensile die, cold extrusion die, cold shear knife.
13. SKD11(SLD) -- high chromium steel without deformation and toughness
Japan's Hitachi plant type production. Because in steel MO, V content increased, the improvement of steel casting organization, refine the grain, improve the carbide morphology, and the tenacity of steel (bending strength, deflection, impact toughness, etc.) than SKD1, D2, high wear resistance is increased, and has higher resistance to drawability. Practice shows that the steel die life than Cr12mov improved. Often require high manufacturing mold, such as the tensile modulus, impact of the grinding wheel piece mould, etc.
14. DC53 -- high toughness and high chromium steel
Japan's big homologous strain type production. The heat treatment hardness is higher than SKD11. High temperature (520-530) of 62-63 HRC after tempering high hardness, DC53 in terms of strength and abrasion resistance than SKD11, toughness is twice the SKD11. DC53 toughness rarely appear cracks and crack in cold work mould manufacturing. Greatly improving the service life. The residual stress is small. The high temperature back to reduce the residual stress. Because of the cracks and deformation after wire-cutting processing, be suppressed, cutting and grinding than SKD11. Used in precision stamping die, cold forging, deep drawing mould, etc.
15. Skh-9 -- high speed universal steel with high wear resistance and toughness
Hitachi plant production. For cold forging die, cutting machine, drill, reamer, punch, etc.
16. Asp-23 -- powder metallurgy high speed steel
Made in Sweden. Carbide distribution is very uniform, wear resistance, high toughness, easy to work, heat treatment size stability. Used for punch, deep drawing die, drill die, milling and cutting blades and other long life cutting tools.
17. P20 -- generally required size plastic mold
Made in USA. Electroless operation. Pre - hard hb270-300. Quenching hardness HRC52.
18, 718 -- high demand size plastic mold
Made in Sweden. Especially for electric corrosion operations. Pre - hard hb290-330. Quenching hardness HRC52
19. Nak80 -- high mirror, high precision plastic mold
Datong plant production. Pre - hard hb370-400. Quenching hardness HRC52
20. S136 -- anti-corrosion and mirror polishing plastic mold
Made in Sweden. Pre-hard HB < 215. Quench hardness HRC52.
21. H13 -- common die-casting die
Used for aluminum, zinc, magnesium and alloy die-casting. Hot stamping die, aluminum extrusion die.
22. SKD61 -- advanced die-casting mold
Hitachi plant production, through the heavy solution technology of electric ballast, the service life is significantly improved compared with that of H13.
23. 8407 -- advanced die-casting mold
Made in Sweden. Hot stamping die, aluminum extrusion die.
24. FDAC -- added sulfur to enhance its sharability
Factory pre-hardness 338-42hrc, can be directly carved processing, without quenching, tempering processing. Used for small batch die, simple die, all kinds of resin products, sliding parts, short delivery mold parts. Zipper die, glass frame die.