生产实践中对冷冲模的强度、韧性和耐磨性提出了越来越高的要求 ,但提高强度和硬度往往带来韧性不足。因此 ,通过热处理改善冷冲模钢的强韧性 ,对提高其使用寿命十分重要。本文着重探讨 6 5Cr4W 3Mo2VNb钢热处理工艺参数对钢的性能和组织的影响 ,提出此钢的淬火温度范围为 1 0 70～ 1 1 80℃ ,回火温度范围为 5 4 0～ 5 90℃。在此范围内调整工艺参数可以得到不同的强韧性配合 Production practice on the strength of the die, toughness and wear resistance put forward higher and higher requirements, but to improve the strength and hardness often lead to lack of toughness. Therefore, the heat treatment to improve the toughness of die steel, to improve its service life is very important. This article focuses on the 6Cr4W3Mo2VNb steel heat treatment process parameters on the performance and microstructure of the steel, suggesting that the quenching temperature of the steel range from 1 070 ~ 1 1 80 ℃, tempering temperature range of 54o ~ 5 90 ℃. Adjust the process parameters in this range can be different toughness with