热处理工艺对新型Cr8Mo2VSi和D2冷作模具钢扁钢组织和力学性能的影响

钢铁, 2008, 43(9): 67-0.

热处理工艺对新型Cr8Mo2VSi和D2冷作模具钢扁钢组织和力学性能的影响

1.1. 钢铁研究总院，北京100081；2. 东北特殊钢集团，辽宁抚顺113001

1.1. Central Iron and Steel Research Institute， Beijing 100081, China；2. Dongbei Special Steel Co., Ltd., Fushun 113001, Liaoning, China

关键词：冷作模具钢;淬火;回火;硬度;显微组织;冲击性能

Effect of Heat Treatment Process on Microstructure and Mechanical Properties of Cr8Mo2VSi and D2 Cold Work Steel

MA Dangshen , LIU Jianhua , CHEN Zaizhi , KANG Aijun , CHI Hongxiao

Keywords： cold work steel;quench;tempering;hardness;microstructure;impact property

研究了热处理工艺对高碳、高铬冷作模具钢Cr8Mo2VSi和D2钢的组织和性能的影响，结果表明：Cr8Mo2VSi比D2钢的碳化物更细小、均匀；1020～1040 ℃淬火，Cr8Mo2VSi的硬度略低于D2，经高温回火后，Cr8Mo2VSi钢表现出更好的二次硬化效应，其硬度高于D2钢1~2（HRC），并且比D2钢具有更好的强、韧性配合。

The effect of heat treatment on the microstructure and mechanical properties of Cr8Mo2VSi and D2 cold work steels were investigated.The results show that carbides in Cr8Mo2VSi were more finer and distributed uniformly than in D2 steel.After heating at 10201040 ℃ then quenching in oil,Cr8Mo2VSi had lower hardness than that of D2 steel, but after tempering at higher temperature, secondary hardening of Cr8Mo2VSi was more obvious and Cr8Mo2VSi by 12HRC was harder than D2 steel, furthermore Cr8Mo2VSi had better combination of toughness and strength than D2.

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