风电用行星轮轮齿开裂原因分析  

Fracture cause analysis of gear tooth of planetary wheel for wind power

作　　者：陈鹏 刘晓明[1] 刘明 韩少强 吴冰寒 钟振前 CHEN Peng;LIU Xiaoming;LIU Ming;HAN Shaoqiang;WU Binghan;ZHONG Zhenqian(Inner Mongolia Power Research Institute,Huhhot 010020,China;NCS Testing Technology Co.,Ltd.,Beijing 100081,China)

机构地区：[1]内蒙古电力科学研究院,内蒙古呼和浩特010020 [2]钢研纳克检测技术股份有限公司,北京100081

出　　处：《冶金分析》2022年第2期76-82,共7页Metallurgical Analysis

摘　　要：某风电齿轮箱在运行3年6个月后监测到运行异常,拆解后发现其中一个行星轮发生断齿失效。实验通过对行星轮断口宏微观形貌分析、化学成分分析、力学性能分析、金相组织分析、残余应力分析和晶粒分布分析等,确定了行星轮轮齿的断裂原因。分析结果表明,行星轮材料母材各化学元素含量及轮齿表面碳元素含量均满足标准规范要求。行星轮轮齿力学性能满足标准规范要求,轮齿渗碳层金相组织和行星轮母材金相组织均未见异常,表明行星轮渗碳工艺和热处理工艺均满足材料使用要求。轮齿断口起裂源区存在大尺寸非金属夹杂物的聚集是运行过程中在该处萌生裂纹并扩展的主要原因。An abnormal operation was detected in a wind power gearbox after service for three years and six months.The failure of broken gear tooth was found on one of planetary wheels after disassembly.The fracture of planetary wheel was analyzed by macro and micro morphology,chemical composition,mechanical properties,metallographic structure,residual stress and grain distribution.The fracture reason of planetary gear tooth was discussed.The analysis results showed that the chemical composition of matrix and the carbon content of gear tooth surface could meet the requirements of corresponding standard specifications.The mechanical properties of planetary gear also met the requirements of the standard specification.Moreover,no abnormity was observed for the metallographic structure of gear teeth carburizing layer and planetary gear matrix.It indicated that the carburizing and heat treatment processes of planetary wheels both met the use requirements of materials.The aggregation of large size nonmetallic inclusions in the cracking source area of the gear was the main reason for the cracking initiating and extension.

关 键 词：疲劳开裂 非金属夹杂物 风电用行星轮 轮齿开裂 

分 类 号：TF761[冶金工程—钢铁冶金]