激光冲击处理对柴油机曲轴圆角残余应力影响  

Effect of laser shock on residual stress of diesel engine crankshaft chamfer

作　　者：杨兴华[1,2] 汤小东[3] 薛茂权[3] 

机构地区：[1]江苏大学机械工程学院,镇江212013 [2]常州轻工职业技术学院 机械工程系,常州213164 [3]常州轻工职业技术学院机械工程系,常州213164

出　　处：《激光技术》2010年第5期596-599,共4页Laser Technology

基　　金：常州市科技攻关计划资助项目(CE20090026);江苏省高校科研成果产业化推进工程资助项目(2009-49)

摘　　要：为了研究激光冲击处理对曲轴连杆轴颈圆角残余应力的影响,采用激光冲击波对曲轴连杆轴颈圆角进行了强化处理,通过X射线衍射法测试了圆角处残余应力的分布规律,对其产生机理进行了分析,研究了激光冲击处理对抗疲劳和磨损性能的影响。结果表明,激光冲击处理后曲轴圆角表面硬度达到了600HV以上,冲击区表层残余压应力达到320MPa。这有利于提高曲轴的磨损性能和疲劳寿命。In order to investigate the effect of laser shock processing on residual stress of crankshaft-connecting rod journal chamfer, the surface of crankshaft-connecting rod journal chamfer was processed by laser shock. Then, the residual stress distribution of the chamfer was measured with X-ray diffraction method, and the production mechanism of residual stress was analyzed. Finally, the effects of laser shock processing on resistance fatigue and resistance wear were investigated. The resuhs show that micro-hardness of crankshaft-connecting rod journal chamfer processed by laser shock is above 600HV, and compressive residual stress in the shocked zone is attained 320MPa, which is benefit to increase its resistance wear and fatigue life.

关 键 词：激光技术 激光冲击处理 曲轴圆角 残余应力 

分 类 号：TG665[金属学及工艺—金属切削加工及机床]