50CrV低温二次硬化机理的探讨  

An Exploration on the Mechanism of Secondary Hardening at Low Temperature in 50CrV Steel

作　　者：王永强[1] 雍岐龙[1] 彭澎[1] 苏加国 程莲萍 

机构地区：[1]昆明理工大学机电学院,云南昆明650093 [2]云南省大学科技园,云南昆明650031

出　　处：《昆明理工大学学报（理工版）》2002年第6期56-59,共4页Journal of Kunming University of Science and Technology(Natural Science Edition)

基　　金：国家自然科学基金资助项目 (项目编号 :5 996 10 0 2 ) .

摘　　要：设计了低温回火工艺 ,使 5 0CrV钢的硬度提高 .通过对比实验和采用透射电镜 ,探讨了低温二次硬化产生的机理 .结果表明 ,低温回火时VC的弥散析出导致了 5 0CrV钢的硬度升高 ,微合金钢中强碳化物形成元素Nb、V、Ti的沉淀强化和固溶强化引起低温二次硬化 .A kind of low temperature tempering treatment is designed to increase the hardness of 50CrV steel.Through Several comparson experiments and TME the mechanism of the secondary hardening at low temperature in 50CrV steel is studied. The results show that the hardness of 50CrV steel increases by VC precipitation, and the secondary hardening at low temperature is caused by precipitation and solution strengthening of the carbonide-formed Nb, V, Ti in microalloyed steel.

关 键 词：微合金钢 低温回火 二次硬化 50CrV钢 硬度 弥散强化 

分 类 号：TG142.41[一般工业技术—材料科学与工程] TG1[金属学及工艺—金属材料]