h13-die steel application –chapter 10

AISI H13

H13  -heat treatment are decarburization, superheating, And H13  also make the mold surface gets residual tensile stress. That H13 will make the mold get failure early. If the temperature of some parts of grinding surface up to over 800℃, and not make it cool fully. Then the material of the surface layer of  H13 will be re-austenize.

  1. And quenching into martensite. So H13 the surface layer of the die will get high stress. At the same time,H13 will make the possibility of getting grinding crack be higher. The technology of heat treatment .
  2. Taking the heat treatment in the right way will make the mold get what it needs about the properties and raise the time of working. But if do H13 in the wrong way, H13 will cause the defects of heat treatment. H13 will harm hugely to its load capacity. The defects of H13 will be dehiscence, strength is not enough and etc.
  3. After a period of time of use, the internal stress accumulates to a damage level. H13  must do a work of strain relief tempering. If not, H13  will dehiscence during work time.

The use and care of h13-die steel

The preheat of steel moldH13 steel has high content alloy elements and its thermal conductivity is bad. So it must fully preheat before the use. The temperature of preheating too high, then the temperature of the mold will be higher during the work. And its strength will get down, it will easy to get plastic deformation then make the surface subsides. However, if the temperature of the preheating is too low, the temperature of the surface has a big change. With high heat stress, get the crackle is more easily. The temperature of preheating for H13 steel mold is at the range of 250-300℃.

That can reduce the temperature difference between the mold and the forgeable piece to avoid excessive thermal stress on the surface of the mold, and effectively avoid the plastic deformation of the mold surface.

Ms Florence Lin

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