个人信息Personal Information
教授
博士生导师
硕士生导师
性别:男
毕业院校:大连理工大学
学位:博士
所在单位:机械工程学院
学科:机械制造及其自动化
办公地点:机械学院知方楼7013
联系方式:Email:duancz@dlut.edu.cn
电子邮箱:duancz@dlut.edu.cn
Microscopic Examination of Primary Shear Zone in High Speed Machining of Hardened High Strength Steel
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论文类型:会议论文
发表时间:2009-12-26
收录刊物:EI、CPCI-S、Scopus
卷号:97-101
页面范围:1887-1890
关键字:High speed machining; Primary Shear Zone; Adiabatic Shear Band; Microstructure; Microhardness
摘要:The microstructure observation and microhardness measurement were performed on the adiabatic shear bands in primary shear zone in the serrated chips formed during high speed machining of two tempering hardness of hardened high strength steel under different cutting speeds by optical microscope, SEM, TEM and microhardness tester. The investigation results show that two types of adiabatic shear bands are formed as cutting speed increases. One is deformed band with heavy elongated microstructures generated under lower cutting speed, another is transformed band with fine grains under higher cutting speed. The increase of the cutting speed little influences on the microhardness in the transformed bands, and the microhardness in deformed band results from strain hardening, whereas transformation hardening leads to very high microhardness in transformed band.