硬态车削对18CrNiMo7-6钢表面完整性影响研究  

Study on the Influence of Hard Turning on Surface Integrity of 18CrNiMo7-6

作　　者：张银霞 于鑫 郜伟 王栋 ZHANG Yin-xia;YU Xin;GAO Wei;WANG Dong(He'nan Key Engineering Laboratory of Anti-fatigue Manufacturing Technology,Zhengzhou University,He'nan Zhengzhou 450001,China)

机构地区：[1]郑州大学抗疲劳制造技术河南省工程实验室,河南郑州450001

出　　处：《机械设计与制造》2023年第3期1-4,共4页Machinery Design & Manufacture

基　　金：国家自然科学基金重点项目(U1804254);国家留学基金委项目(201907045070)。

摘　　要：介绍了硬态车削淬硬钢表面粗糙度与表层残余应力研究现状。通过设计单因素试验,对硬态车削18CrNiMo7-6渗碳钢圆棒试样的三维表面粗糙度与表层残余应力进行分析,探究硬态车削工艺参数对淬硬钢表面完整性的影响规律。结果表明干式硬态车削18CrNiMo7-6渗碳钢可获得较好的表面三维粗糙度与残余压应力,残余应力沿深度方向分布表现为先增大至最大值后逐渐减小至稳定值。在硬态车削过程中,进给速度对工件表面完整性影响最大,切削速度影响次之,背吃刀量影响最小。The development status of surface roughness and surface residual stress of hardened turning steel is analyzed. Through the design of single factor test,the three-dimensional surface roughness and surface residual stress of 18crnimo7-6 carburizing steel round bar in hard turning are analyzed to explore the influence of hard turning process parameters on the surface integrity of hardened steel. The results show that good surface roughness and residual compressive stress can be obtained by dry turning 18crnimo7-6 carburized steel. The distribution of residual stress along the depth direction first increases to the maximum value and then gradually decreases to the stable value. In the process of hard turning,the feed speed has the greatest influence on the surface integrity of the workpiece,the cutting speed has the second influence,and the back draft has the least influence.

关 键 词：18CrNiMo7-6钢 硬态车削 三维表面粗糙度 残余压应力 进给速度 

分 类 号：TH16[机械工程—机械制造及自动化] TG519.3[机械工程—精密仪器及机械]