渗碳齿轮齿根喷丸强化研究现状与展望  

Research Status and Prospect of Shot Peening for Carburized Gear Roots

作　　者：朱鹏飞 严宏志[1] 陈志[1] 吴顺兴[1] 张慧 ZHU Peng-fei;YAN Hong-zhi;CHEN Zhi;WU Shun-xing;ZHANG Hui(Central South University,Changsha 410083,China;Kaifeng University,Kaifeng 475004,China)

机构地区：[1]中南大学,长沙410083 [2]开封大学,河南开封475004

出　　处：《表面技术》2021年第1期10-27,46,共19页Surface Technology

基　　金：国家自然科学基金项目(52075552);湖南省创新创业技术投资项目(2019GK5032)。

摘　　要：弯曲疲劳是齿轮传动中的主要失效形式,严重影响了齿轮使用性能。喷丸强化工艺是齿轮常用的表面强化方法,对提升齿根抗弯曲疲劳性能效果显著。介绍了两种典型的喷丸强化方法(气动式喷丸和离心式喷丸),分别从应用范围、加工效率、喷射原理、表面完整性等方面对其进行了比较。为揭示喷丸强化机制,概述了喷丸工艺数值模拟与工艺参数优化方法,分析了喷丸对齿根表面完整性影响机制,并阐述了表面完整性参量之间的相互作用关系。同时,阐明了齿轮喷丸后的疲劳断裂机理,包括裂纹萌生与扩展机制。在此基础上,重点论述了受喷齿轮弯曲疲劳性能的影响因素,并提出了改善齿轮疲劳强度的措施。此外,简要探讨了齿轮喷丸后,疲劳强度提升幅度问题,并归纳了受喷齿轮弯曲疲劳建模方法。最后,对齿轮齿根喷丸强化工艺进行总结,并对其发展趋势进行了展望。Bending fatigue is the main failure form of gear transmission,which seriously affects the service performance of gears.Shot peening strengthening technology is a common surface strengthening method for gears that can effectively improve the bending fatigue resistance for gear roots.Two typical shot peening strengthening methods(air-blast peening and centrifugal peening)were introduced,which were compared from the aspects of application range,machining efficiency,spraying principle,surface integrity,etc.,respectively.To reveal the mechanism of shot peening strengthening,numerical simulation and parameter optimization methods of shot peening were summarized,influence mechanism of shot peening on the surface integrity of gear roots was analyzed,and correlation of surface integrity parameters was expounded.Meanwhile,the fatigue fracture mechanism(including crack initiation and propagation)of shot-peened gears were revealed.On this basis,influence factors of bending fatigue for shot-peened gears were emphatically discussed,and measures to improve the fatigue strength of gears were put forward.In addition,the gain in fatigue strength of shot-peened gear was discussed briefly,and bending fatigue modeling methods for shot-peened gears were generalized.Finally,shot-peening strengthening process of gear roots was summarized and its development trend was prospected.

关 键 词：齿根 弯曲疲劳 喷丸 表面完整性 裂纹 

分 类 号：TG668[金属学及工艺—金属切削加工及机床] TG132.41[一般工业技术—材料科学与工程]