台架试验中齿轮断齿的原因分析  

Failure analysis of gear fracture cracking during bench test

作　　者：何亮亮[1] 王元栋 王梦梦 侯圣文 王妍 He Liangliang;Wang Yuandong;Wang Mengmeng;Hou Shengwen;Wang Yan(Shaanxi Fast Gear Co.,Ltd.,Xi’an Shaanxi 710119,China)

机构地区：[1]陕西法士特齿轮有限责任公司,陕西西安710119

出　　处：《金属热处理》2021年第1期235-238,共4页Heat Treatment of Metals

摘　　要：采用显微组织分析,结合断口形貌分析、齿形齿向分析对齿轮断齿原因进行失效分析。结果表明,齿根圆角表层非马氏体组织深度不符合技术要求,但非本次断齿的主要原因。齿轮断齿根本原因为齿根次表面存在大尺寸氧化物夹杂,在试验持续受力过程中以该夹杂为疲劳源发生鱼眼状疲劳断裂。Causes of gear fracture failure were analyzed by means of metallographic analysis,fracture analysis,tooth profile and lead analysis.The results show that though the surface unqualified non-martensite structure of the root was observed,it is not the main cause of this gear fracture.The main reason is the presence of large-scale oxide inclusion on the root subsurface of gear teeth,which is the fatigue source under the continuous stress during bench test,and leads to the fish-eye type fatigue cracking.

关 键 词：齿轮 失效分析 夹杂物 鱼眼状疲劳断裂 

分 类 号：TG142.4[一般工业技术—材料科学与工程]