8Cr4Mo4V轴承钢晶粒尺寸与残余应力的电冲击处理调控  

Control of Grain Size and Residual Stress of 8Cr4Mo4V Bearing Steel by Electro-Shocking Treatment

作　　者：赵鸿杰 王丰 孙洪鑫 谢乐春 ZHAO Hongjie;WANG Feng;SUN Hongxin;XIE Lechun(Hubei Key Laboratory of Advanced Technology for Automotive Components,Wuhan University of Technology,Wuhan 430070,China;Hubei Collaborative Innovation Center for Automotive Components Technology,Wuhan University of Technology,Wuhan 430070,China)

机构地区：[1]武汉理工大学现代汽车零部件技术湖北省重点实验室,武汉430070 [2]武汉理工大学汽车零部件技术湖北省协同创新中心,武汉430070

出　　处：《轴承》2024年第11期37-42,共6页Bearing

基　　金：国家重点研发计划资助项目(2020YFA0714900);国家自然科学基金资助项目(52271135);国家自然科学基金重大研究计划(培育)资助项目(92266102)。

摘　　要：为实现退火态8Cr4Mo4V轴承钢晶粒尺寸与残余应力的调控,提出了一种电冲击处理方法,并分析了电冲击处理对8Cr4Mo4V轴承钢微观结构、残余应力以及硬度的影响,结果表明:随着电冲击处理时间增加,平均晶粒尺寸先减小后增大,孔洞直径减小,平均残余压应力先增大后减小,残余压应力分布更均匀,硬度整体呈增加趋势,说明电冲击处理可以调控8Cr4Mo4V的微观组织,达到优化残余应力分布的目的,进而消除材料内部分布不均的微变形。To achieve the control of grain size and residual stress of annealed 8Cr4Mo4V bearing steel,an electroshocking treatment method is proposed,and the effects of electro-shocking treatment on microstructure,residual stress and hardness of 8Cr4Mo4V bearing steel are analyzed.The results show that with the increase of electroshocking treatment time,the average grain size decreases first and then increases,the diameter of void decreases,the average residual compressive stress increases first and then decreases,the residual compressive stress distribution became more uniform,and the hardness shows an overall increasing trend,indicating that the electro-shocking treatment can control the microstructure of 8Cr4Mo4V,optimize the residual stress distribution,and eliminate the micro deformation caused by uneven distribution inside material.

关 键 词：滚动轴承 高温轴承钢 脉冲电流 显微组织 残余应力 硬度 

分 类 号：TH133.33[机械工程—机械制造及自动化] TG156.7[金属学及工艺—热处理]