汽车差速器齿圈断齿失效分析  

Failure Analysis on Crack of Differential Ring Gear Used in Some Kind of Car Gearbox

作　　者：张翔[1] 游文明[1] 孔纪兰[1] 

机构地区：[1]扬州市职业大学,扬州225012

出　　处：《现代制造技术与装备》2016年第12期105-106,108,共3页Modern Manufacturing Technology and Equipment

基　　金：江苏高校品牌专业建设工程项目(PPZY2015C234)

摘　　要：通过宏观和微区形貌检查、化学成分、金相组织检验和显微硬度测试等,对某汽车差速器齿圈断齿原因进行分析。结果表明,该齿圈存在机加工划痕,热处理后齿圈心部强度偏低。相对于承载能力而言,工作应力较大是导致齿圈发生快速脆性断裂的原因,并给出了必要的预防建议。The failure comparative analysis were carried on differential ring gear used in some kind of car gearbox,including macro appearance inspection, SEM, chemical analysis,metallographic analysis, micro hardness testing and so on. The results show that a scratch on the machined surface, lower core hardness and higher stress are the key reasons for fast brittle fracture failure, and the prevention measures were put forward.

关 键 词：20CrMnTiH 齿圈 断裂 失效分析 

分 类 号：U463.218.4[机械工程—车辆工程]