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1. 45 high quality carbon structural steel, commonly used medium carbon quenched and tempered steel

Main features: the commonly used medium carbon quenched and tempered steel has good comprehensive mechanical properties, low hardenability, and is easy to crack during water quenching. Small parts should be tempered and large parts normalized. Application example: it is mainly used to manufacture high-intensity moving parts, such as turbine impeller and compressor piston. Shaft, gear, rack, worm, etc. Pay attention to preheating before welding and annealing after welding to eliminate stress.

2. Q235A (A3 steel) - common carbon structural steel

Main features: high plasticity, toughness, weldability, cold stamping performance, certain strength and good cold bending performance. Application example: it is widely used in parts and welded structures with general requirements. Such as tie rods, connecting rods, pins, shafts, screws, nuts, ferrules, brackets, bases, building structures, bridges, etc. are not stressed.

3. 40Cr - one of the widely used steels, which belongs to alloy structural steel

Main features: after quenching and tempering, it has good comprehensive mechanical properties, good low-temperature impact toughness, low notch sensitivity, good hardenability, high oil-cooled fatigue strength, and easy to machine parts with complex shapes by water cooling. Cracks appear, the cold bending plasticity is medium, and the machinability is good after tempering or quenching and tempering, but the weldability is not good, and cracks are easy to appear. Preheat to 100 ~ 150 ℃ before welding. It is generally used in the quenching and tempering state. Carburizing, carbonitriding and high frequency surface quenching. Application example: after 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 tempering and high-frequency surface quenching, it is used to make the surface have high hardness and resistance. Ground parts, such as gears, shafts, spindles, crankshafts, spindles, bushings, pins, connecting rods, screws and nuts, intake valves, etc., are used to manufacture heavy and medium-sized high-speed impact parts, such as oil pump rotors, sliders, gears, spindles, collars, etc., after medium temperature tempering, and heavy, low impact, wear-resistant parts after quenching and low-temperature tempering, such as worms, spindles, shafts, collars, etc., with carbon in the nitrided parts, It will manufacture transmission components with larger size and higher low-temperature impact toughness, such as shafts, gears, etc.

4. HT150 grey 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 of various standard parts and fasteners

Main features: suitable strength, good plasticity, high cold plasticity and good weldability. Partial upsetting and stretching can be carried out in cold state. Application examples of low hardenability after normalizing or quenching and tempering: suitable for manufacturing small cross-section parts and parts that can bear large loads: crankshaft, lever, connecting rod, shackle, etc., various standard parts and fasteners.

6. 65Mn common spring steel

Application examples: various leaf springs, round springs, buffer springs, small-size springs, can also be made into spring coils, valve springs, clutch springs, brake springs, cold-rolled coil springs, snap springs, etc.

7. 0Cr18Ni9 - common stainless steel (American steel 304, Japanese steel SUS304)

Characteristics and application: it is a widely used stainless heat-resistant steel, such as food equipment, general chemical equipment, raw energy industrial equipment, etc.

8. Cr12 common cold working die steel (American steel D3, Japanese steel skd1)

Characteristics and application: Cr12 Steel is a widely used cold work die steel, which is a high carbon and high chromium ledeburite steel. The steel has good hardenability and wear resistance; Because the carbon content of Cr12 Steel is as high as 2.3%, the impact toughness is poor, it is easy to embrittle, and it is easy to form uneven eutectic carbides; Because Cr12 Steel has good wear resistance, it is mostly used to manufacture cold punches, punches, blanking dies, cold heading dies, punches and cold extrusion dies, drill sleeves, gauges, etc. it requires high wear resistance, low impact load, wire drawing dies, stamping dies, wire rolling plates, deep drawing dies, cold pressing dies, etc. for powder metallurgy.

9. DC53 common cold working die steel imported from Japan

Characteristics and application: high strength and toughness cold working die steel, a steel grade manufactured by Japan Datong Special Steel Co., Ltd. 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 stamping dies, punches, etc. 10. Sm45 ordinary carbon plastic die steel (Japanese steel S45C)

10. Dccr12mov wear resistant chromium steel

Domestic. Compared with Cr12 Steel, the carbon content is lower. Adding Mo and V can improve the uneven carbide. Mo can reduce carbide segregation and improve hardenability. V can refine grains and increase toughness. The steel has high hardenability. The section can be hardened 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. Good comprehensive mechanical properties. Therefore, various dies with large cross-section, complex shape and able to withstand large impact can be manufactured, such as ordinary wire drawing dies, punching dies, punching dies, blanking dies, trimming dies, edging dies, wire drawing dies, etc. , cold extrusion die, cold shear, circular saw, standard tools, measuring tools, etc.

11. SKD11 tough chrome steel

Produced by Hitachi, Japan. Technically improve the structure of steel castings and refine the grains. Compared with Cr12MoV, the toughness and wear resistance are improved. Prolong the service life of the die.

12. D2 high carbon and high chromium cold worked steel

Made in the United States. It has high hardenability, hardenability, wear resistance, high temperature oxidation resistance, good rust prevention after quenching and polishing, and small heat treatment deformation. It is suitable for manufacturing all kinds of cold working dies with high precision and long service life. , tools and measuring tools, such as wire drawing dies, cold extrusion dies, cold scissors, etc.

13. SKD11 (SLD) - non deformation toughness high chromium steel

Produced by Hitachi, Japan. Due to the increase of Mo and V content in the steel, the casting structure in the steel is improved, the grain is refined, and the carbide morphology is improved. Therefore, the strength and toughness (bending strength, deflection, impact toughness, etc.) of the steel are higher than those of skd1 and D2, the wear resistance is also improved, and the steel has higher resistance to backfire. Practice has proved that the service life of this steel die is longer than that of Cr12MoV. It often manufactures molds with high requirements, such as drawing molds, impact grinding wheel molds, etc.

14. DC53 high toughness high chromium steel

Produced by Datong, Japan. The hardness of heat treatment 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 has almost no cracks and cracks in cold working die manufacturing. The service life is greatly improved. The residual stress is small. The residual stress decreases after high temperature. Because the cracks and deformation after wire cutting are restrained. Machinability and abrasiveness exceed SKD11. Uses: used for precision stamping dies, cold forging, drawing dies, etc.

15. Skh-9-general high speed steel, with wear resistance and 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. The carbides are evenly distributed, wear-resistant, high toughness, easy to process and stable in heat treatment. It is used for long-life tools such as punch, deep punching die, drilling die, milling cutter and shear blade.

17. P20 - plastic mold with general required size

Produced in the United States. It can be operated by electric corrosion. The factory status is pre hardened hb270-300. The quenching hardness is hrc52.

18.718-plastic mold with high requirements

Made in Sweden. It is especially suitable for electric erosion operation. The factory status is pre hardened hb290-330. Quenching hardness hrc52

19. NAK80 high mirror and high-precision plastic mold

Produced by Datong, Japan. Pre hardened hb370-400 in factory condition. Quenching hardness hrc52

20. S136 corrosion resistant mirror polished plastic mold

Made in Sweden. Pre hardening HB < 215. Quenching hardness hrc52.

21. H13 ordinary die casting die

Used for die casting of aluminum, zinc, magnesium and alloys. Hot stamping die, aluminum extrusion die,

22. SKD61 advanced die casting die

Produced by Hitachi in Japan, the service life is significantly longer than H13 through electric ballast remelting technology. Hot stamping die, aluminum extrusion die,

23. 8407 advanced die casting die

Made in Sweden. Hot stamping die, aluminum extrusion die.

24. Fdac adds sulfur to enhance its ease of cutting

The factory pre hardening hardness is 338-42hrc, which can be directly carved without tempering. It is used for small batch molds, simple molds, various resin products, sliding parts and molds with short delivery time. Zipper mold, eyeglass frame mold.