摘要
根据50CrV4中温回火工艺，对两种成分的50CRY4进行了不同时间的回火试验，对比试验结果和透射电镜分析，探讨了50Crv4的二次硬化现象。结果表明：中温回火时，随着时间的延长，合金中析出弥散分布的VC颗粒，起到了沉淀强化作用，并引起回火过程中的二次硬化现象。
A kind of Intermediate-temperature tempering treatment is designed to increase the hardness of 50CRY4 steel.Through two comparson experiments and TEM the mechanism of the secondary hardening at intermediate-temperature in 50CrV4 steel is studied. The results show that the hardness of 50CrV4 steel increases by VC precipitation, and the secondary hardening at intermediate-temperature is caused by solution strengthening of the carbonide-formed V in microalloyed steel during the intermediate-temperature tempering.
出处
《中国材料科技与设备》
2008年第4期80-81,83,共3页
Chinese Materials Science Technology & Equipment
关键词
50CRY4
二次硬化
中温回火
Microalloyed steel
Intermediate-temperature tempering
Secondary hardening
