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HMD5 steel is a flame hardening steel produced by the flame surface hardening process, the steel has good wear resistance, pressure resistance, toughness and weldability, in addition, the steel also has good nitriding hardening characteristics and heat treatment effect stability, and has high hardness when air cooling.

Application and use of flame steel:

HMD5 die steel used in which HMD5 die steel sheet is suitable for sheet metal die, cold stamping die, blanking die for thin objects; Suitable for stamping die, trimming die.

Delivery status and hardness:

HMD5 die steel Steel rod steel plate round steel round steel material The supply state of the material module is softening annealing state, the factory hardness is about 225HBW.

Hardening process and heat treatment hardness:

HMD5 die steel quenching temperature 875-950℃, air cooling or oil cooling; Tempering temperature 150-200℃, hardness 61HRC

Japan Hitachi HMD5 features:

1, HMD5 external processing process is simple, after the flame heating, only air cooling can get enough hardness, not easy to produce surface oxidation and decarbonization, not limited by the site, equipment, the operator is convenient, can shorten the mold manufacturing cycle, save energy, reduce manufacturing costs.

2, HMD5 quenching temperature range is wide, changes in the range of 825~1100℃, and has good results after quenching.

3, HMD5 hardenability is good, high hardenability, hot outside deformation is small, when the mold and all processing molding, in the cutting edge with oxygen-7 fast flame to the quenching temperature, and then air cooling is reached

Fire purpose, no other processing is required, so the deformation is very small.

4. HMD5 has excellent toughness, and the cutting edge is not easy to crack or collapse during the use of the mold.

5, flame quenching and the overall quenching similar hardness and various properties, high hardness, good wear resistance, air cooling hardness can generally reach more than 60HRC. 6HMD5 has good weldability and is easy to repair and repair. When there is a deviation in manufacturing, the corresponding welding rod can be used to repair welding, and the ideal effect can be achieved after polishing.

Hitachi HMD5 Chemical composition:

Japan Hitachi Metal patent steel, chemical composition is not disclosed.

Japan Hitachi HMD5 flame quenching process:

Heating temperature :825 ° C ~1100 ° C, heating to bright red (950 ° C target), gradually move the heating area, the following figure is Japan Hitachi flame quenching steel HMD flame quenching process essentials.

Cooling method: air cooling.

Tempering process: After 150~200℃ tempering, toughness can be improved, hardness after tempering >60HRC.

Japan Hitachi HMD5 application:

Widely used in the manufacture of cold stamping die, cold blanking die, deep blanking die, sheet punching die, shaping die, cutting die, cutting die, bending die and other cold working die, the practice has proved that Japan Hitachi HMD5 is particularly suitable for large insert die and cold working die with high strength and toughness requirements (such as: cold extrusion die, cold forging die, etc.).