Die steel is used to make cold die, hot forging die die mold and other steel. What kind of mold steel count
Is superior performance, you need to have the following eight performance requirements:
First, the annealing process
Spherical annealing temperature range is wide, the annealing hardness is low and the fluctuation range is small, the spheroidizing rate is high
With a low hot forging deformation resistance, good plastic, forging temperature range, forging cracking and precipitation of carbonization
Things tend to low.
Third, oxidation, decarburization sensitivity
High temperature heating, good resistance to oxidation, decarburization speed is good, not sensitive to the heating medium, resulting in pits tend to small.
Fourth, cutting processing
Cutting the amount of large, low tool loss, low surface roughness
After quenching can get a deeper hardened layer, the use of moderate quenching medium can be hardened
Grinding wheel relative loss is small, no burn limit grinding large amount of grinding wheel quality and cooling quality is not sensitive, not easy
Abrasion and grinding cracks.
After quenching with uniform and high surface hardness
Eight, quenching deformation cracking tendency
Conventional quenching volume change is small, shape warpage, distortion is slight, abnormal deformation tendency is low. Conventional quenching cracking
Low sensitivity, the quenching temperature and the shape of the workpiece is not sensitive.
Only after the tempered mold steel is really qualified and durable products.
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