淬火温度对W6Mo5Cr4V2高速钢显微组织和硬度的影响  

Effect of Quenching Temperature on Microstructure and Hardness of W6Mo5Cr4V2 High Speed Steel

作　　者：史涛 李方杰 鄢翊飞 沙业雨 周勰 SHI Tao;LI Fang-jie;YAN Yi-fei;SHA Ye-yu;ZHOU Xie(School of Materials Engineering,Shanghai University of Engineering Science,Shanghai 201620,China)

机构地区：[1]上海工程技术大学材料工程学院,上海201602

出　　处：《热处理技术与装备》2021年第5期1-4,共4页Heat Treatment Technology and Equipment

基　　金：上海市青年科技扬帆计划项目(20YF1415800)。

摘　　要：采用光学显微镜、扫描电子显微镜和硬度计分析了W6Mo5Cr4V2高速钢在不同温度下淬火+560℃三次回火后的组织演变和硬度的变化。结果表明:W6Mo5Cr4V2高速钢淬火温度较低时(1050℃),组织中存在粗大的网络状碳化物,基体中固溶的合金元素减少,硬度较低;淬火温度较高时(1150℃),显微组织中发现过热魏氏组织,综合性能下降;经过1100℃淬火后组织中碳化物分布均匀,存在"二次硬化,使硬度增加,为最佳淬火温度。The structure evolution and hardness changes of W6Mo5Cr4V2 high speed steel at different quenching temperatures and three times tempering at 560℃are analyzed by optical microscope,scanning electron microscope and hardness tester.The results show that when the quenching temperature of W6Mo5Cr4V2 high speed steel is low(1050℃),there are coarse network-like carbides in the microstructure,and the solid solution of alloying elements in the matrix is reduced,so the hardness is low.When the quenching temperature is high(1150℃),the overheated Widmanstatten structure is found in the microstructure,and the comprehensive performance decreases.After quenching at 1100℃,the carbide distribution in the microstructure is uniform,and there is"secondary hardening"to increase the hardness,which is the best quenching temperature.

关 键 词：高速钢 淬火 显微组织 硬度 

分 类 号：TG156.3[金属学及工艺—热处理]