H13 application –chapter 10

h13 die steel

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

  1. And quenching into martensite. So the surface layer of the die for H13 steel  will get high stress. At the same time, that H13 STEEL  will make the possibility of getting grinding crack be higher. The technology of heat treatment 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 steel  in the wrong way, it will cause the defects of heat treatment. H13 steel will harm hugely to its load capacity. The defects of hdehiscence, strength is not enough and etc. After a period of time of use, the internal stress accumulates to a damage level. It must do a work of strain relief tempering. If not, it will dehiscence during work time.

The use and care of H13 steel die

  1. The preheat of steel mold H13 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℃.
  3. H13 steel 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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