STUDY ON THE INFLUENCE OF SHOT PEENING ON THE BENDING FATIGUE CHARACTERISTICS OF 20MNCR5 CARBURIZED GEAR

ZHAO HongQiao; XIAO JiSheng; ZHONG ZhenYuan; WANG Rong; LUO WeiXian; HU JianSun

doi:10.16579/j.issn.1001.9669.2022.05.07

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STUDY ON THE INFLUENCE OF SHOT PEENING ON THE BENDING FATIGUE CHARACTERISTICS OF 20MNCR5 CARBURIZED GEAR

更新时间：2022-11-10

- STUDY ON THE INFLUENCE OF SHOT PEENING ON THE BENDING FATIGUE CHARACTERISTICS OF 20MNCR5 CARBURIZED GEAR
- Journal of Mechanical Strength Vol. 44, Issue 5, Pages: 1064-1068(2022)
- 作者机构：
  
  1. 广州汽车集团股份有限公司汽车工程研究院
- 作者简介：
- 基金信息：
- DOI：10.16579/j.issn.1001.9669.2022.05.07
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ZHAO HongQiao, XIAO JiSheng, ZHONG ZhenYuan, et al. STUDY ON THE INFLUENCE OF SHOT PEENING ON THE BENDING FATIGUE CHARACTERISTICS OF 20MNCR5 CARBURIZED GEAR. [J]. 44(5):1064-1068(2022)
DOI：

ZHAO HongQiao, XIAO JiSheng, ZHONG ZhenYuan, et al. STUDY ON THE INFLUENCE OF SHOT PEENING ON THE BENDING FATIGUE CHARACTERISTICS OF 20MNCR5 CARBURIZED GEAR. [J]. 44(5):1064-1068(2022) DOI： 10.16579/j.issn.1001.9669.2022.05.07.

摘要

弯曲疲劳失效是传动系统中齿轮主要失效形式之一，喷丸是一种重要的齿轮强化工艺。为明确喷丸对齿轮弯曲疲劳特性的影响，以20MnCr5渗碳渐开线圆柱直齿轮为研究对象，采用与我公司产品相同的喷丸工艺，分别对喷丸前后齿面完整性进行对比分析，阐明喷丸对齿面完整性的影响。采用单齿载荷加载方法进行弯曲疲劳试验，然后基于失效断口的扫描电子显微镜观测，分析喷丸前后裂纹源区失效特征的差异。研究发现喷丸对齿面完整性有很大的提升，但对齿面波纹度有不利影响。喷丸能够有效提高齿轮弯曲疲劳强度，同时对裂纹从表面萌生起到抑制作用。

Abstract

Bending fatigue failure is one of the main failure modes for gears in transmission system, shot peening is an important gear strengthen technology. In order to study the influence of shot peening on gear bending fatigue characteristics, 20 MnCr5 carburized involute cylindrical spur gear was adopted as study object. The effect of shot peening on gear surface integrity were analyzed before and after shot peening, coinciding with our products. Bending fatigue test was carried out with the single tooth loading method, afterwards, based on the observation of the failure fracture surfaces by scanning electron microscope（SEM）, the differences of failure characteristics in the crack source areas before and after shot peening were analyzed. It is found that shot peening can greatly improve gear surface integrity, although it has a negative effect on the gear surface corrugation. Shot peening can effectively increase gear bending strength and restrain the crack initiation from the gear surface.

关键词

20MnCr5渗碳齿轮喷丸齿面完整性弯曲疲劳特性失效断口观测

Keywords

20MnCr5 carburized gearShot peeningGear surface integrityBending fatigue characteristicsFailure fracture surfaces observation

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