微量Ce元素对42CrMo易切削钢切削性能的影响  

Effect of Trace Ce on the Cutting Performance of 42CrMo Free-cutting Steel

作　　者：袁麟 郑雷刚[2] 胡小强[2] 张玉妥[1,2] YUAN Lin;ZHENG Leigang;HU Xiaoqiang;ZHANG Yutuo(Shenyang Ligong University,Shenyang 110159,China;Shenyang National Laboratory for Materials Science Institute of Metal Research,Chinese Academy of Sciences,Shenyang 110016,China)

机构地区：[1]沈阳理工大学材料科学与工程学院,沈阳110159 [2]中国科学院金属研究所沈阳材料科学国家研究中心,沈阳110016

出　　处：《沈阳理工大学学报》2022年第5期76-80,共5页Journal of Shenyang Ligong University

基　　金：江西省重大科技专项(20194ABC28011);扬州市邗江区科技项目(HJZ2020003);福建省STS计划配套项目(2020T3009)。

摘　　要：利用扫描电镜、能谱仪、质量分析仪和车削加工等实验方法,对比分析稀土Ce元素对42CrMo易切削钢夹杂物和切削性能的影响。结果表明:Ce元素具有显著的变质夹杂作用,加入0.013%Ce元素后,42CrMo钢中夹杂物类型由MnS和Al_(2)O_(3)为主转变为以Ce_(2)S_(3)为主,夹杂物数量增多,尺寸减小,具有较小的长径比;细小颗粒状稀土硫化物促进了切削裂纹扩展和显微空洞形成,切屑由以平螺旋屑为主转变为以C形屑为主,切削性能得到明显改善。Using scanning electron microscope,energy spectrometer,quality analyzer and lathe machining and other experimental methods,the effects of rare earth Ce on inclusions and cutting performance of 42CrMo free-cutting steel were investigated.The results show that Ce element has a significant influence on inclusion modification.After adding 0.013%Ce element,the type of inclusions in 42CrMo steel changes from MnS and Al_(2)O_(3)to Ce_(2)S_(3).In addition,the number of inclusions increased,the size decreased,and the inclusions had a smaller aspect ratio.The fine particles of rare earth sulfide contributed to the propagation of cutting cracks and the formation of microcavities.The cutting chips changed from flat spiral chips to C-shaped chips,and the cutting performance was significantly improved.

关 键 词：稀土Ce元素 易切削钢 夹杂物 切削性能 

分 类 号：TG142.33[一般工业技术—材料科学与工程]