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针对选材与热加工工艺不当造成冷冲头早期失效这一问题，通过分析高速钢碳化物形貌对冷冲头组织性能的影响及进行对比试验，确定了钢材直径≤40mm的M2高速钢为制作冷冲头的材料和M／B下复相等温淬火一多次高温回火─Re－S－C－N－B－O五元共渗的冷冲头处理新工艺。结合试验对新工艺进行分析，结果表明与常规热处理比较，此工艺处理的冷冲头可满足单位挤压力2500~330MPa的高负荷使用条件，使用寿命提高5~10倍，具有极高的推广应用价值。
Aiming at the problem of early failure of cold punch in the process of improper material selection and thermal processing, the effect of carbide morphology of high speed steel on the microstructure and properties of cold punch was analyzed and compared. The results showed that M2 high speed steel with diameter less than 40 mm Cold punch material and M / B complex phase isothermal quenching a number of high temperature tempering ─Re-S-C-N-B-O five yuan percolation cold punch processing new technology. The results show that compared with the conventional heat treatment, the cold punching process of this process can meet the high load conditions of 2500 ~ 330MPa per unit pressing force, and the service life can be increased by 5 ~ 10 times, which has a very high popularization Value.