复合小径喷丸强化对齿轮接触疲劳性能的影响  

Effect of composite small diameter shot peening on contact fatigue performance of gear

作　　者：许任宗 陈勇[1] 李光鑫 武一民[1] 贾纪鹏 XU Ren-zong;CHEN Yong;LI Guang-xin;WU Yi-min;JIA Ji-peng(Tianjin Key Laboratory of Power Transmission and Safety Technology for New Energy Vehicles,Hebei University of Technology,Tianjin 300130,China)

机构地区：[1]河北工业大学天津市新能源汽车动力传动与安全技术重点实验室,天津300130

出　　处：《材料热处理学报》2023年第5期191-200,共10页Transactions of Materials and Heat Treatment

基　　金：国家重点研发计划资助(2018YFE0207000);河北省全职引进高端人才项目(20181228)。

摘　　要：为研究复合小径喷丸强化对齿轮接触疲劳性能的影响,通过有限元模拟与喷丸强化试验相结合对复合小径喷丸强化效果进行分析,利用齿轮接触疲劳寿命试验验证复合小径喷丸齿轮的寿命提升效果。结果表明:相较于单次小径喷丸,复合小径喷丸能够获得更大的残余压应力,且表面粗糙度更小;随着喷丸强度和喷丸覆盖率的增大,残余压应力值均有所增大,且残余压应力最大值深度基本不变。通过喷丸强化试验,验证了喷丸有限元模型的合理性,且复合小径喷丸强化在齿轮表层引入高残余压应力和提升表面硬度的同时基本不改变粗糙度大小。齿轮接触疲劳寿命试验结果表明复合小径喷丸后齿轮副间的传动效率明显升高,疲劳寿命相当于未喷丸齿轮的2.38倍,寿命提升效果明显。In order to study the effect of composite small diameter shot peening on contact fatigue performance of gears,the effect of composite small diameter shot peening was analyzed by combining finite element simulation and shot peening strengthening test,and the effect of life improvement of composite small diameter shot peening gears was verified by gear contact fatigue life test.The results show that compared with the single small diameter shot peening,the composite small diameter shot peening can obtain greater residual compressive stress and smaller surface roughness.With the increase of shot peening intensity and shot peening coverage,the residual compressive stress increases,and the depth of the maximum residual compressive stress is basically unchanged.The rationality of the finite element model of shot peening is verified by shot peening strengthening test,and the composite small diameter shot peening can introduce high residual compressive stress on the surface of the gear and improve the surface hardness without changing the roughness.The results of gear contact fatigue life test show that the transmission efficiency between gear pairs is significantly increased after composite small diameter shot peening,and the fatigue life is 2.38 times of that of the gear without shot peening,and the effect of life improvement is obvious.

关 键 词：复合小径喷丸 齿轮 有限元模拟 残余应力 接触疲劳性能 

分 类 号：TG174.44[金属学及工艺—金属表面处理]