圆锥滚子轴承内圈大挡边碎裂失效分析  

Failure Analysis on Cracking of Large Rib of Tapered Roller Bearing Inner Rings

作　　者：仪欣 申明月 董智鹏 王宇 YI Xin;SHEN Mingyue;DONG Zhipeng;WANG Yu(Wafangdian Bearing Group National Bearing Engineering Technology Research Center Co.,Ltd.,Wafangdian 116300,China;Institute of Transmission Machinery Bearings of ZWZ Bearing Group Co.,Ltd.,Wafangdian 116300,China;Manufacturing Process and Equipment Research and Design Center of ZWZ Bearing Group Co.,Ltd.,Wafangdian 116300,China;Special Precision Bearing Manufacture of ZWZ Bearing Group Co.,Ltd.,Wafangdian 116300,China)

机构地区：[1]瓦房店轴承集团国家轴承工程技术研究中心有限公司,辽宁瓦房店116300 [2]瓦房店轴承集团传动机械轴承研究所,辽宁瓦房店116300 [3]瓦房店轴承集团制造工艺及设备研发中心,辽宁瓦房店116300 [4]瓦房店轴承集团特种精密轴承制造有限公司,辽宁瓦房店116300

出　　处：《哈尔滨轴承》2024年第2期39-41,共3页Journal of Harbin Bearing

摘　　要：针对某型圆锥滚子轴承内圈大挡边碎裂的问题,采用化学成分分析、金相组织检验及洛氏硬度检验等技术对失效原因进行了分析。结果表明:内圈大挡边油沟表面加工质量较差导致该处应力集中因素增大,该处表面的氧化和脱碳使其强度降低、缺口敏感性增加,最终导致内圈大挡边碎裂。In response to large rib cracking in the inner ring of a tapered roller bearing roller,the causes of bearing failure have been determined by means of chemical composition analysis,metallographic structure examination and Rockwell hardness inspection.The results show that the oil groove of inner ring large rib has poor surface quality that increases the stress concentration factor.Surface oxidation and decarburization of oil groove reduce its strength,increase its notch sensitivity,eventually cause the inner ring large rib to crack.

关 键 词：氧化 脱碳层 表面加工质量 化学成分 金相组织 

分 类 号：TH133.3[机械工程—机械制造及自动化] TG115[金属学及工艺—物理冶金]