斗轮机回转齿轮断齿原因分析  

Fracture Failure Analysis on Reverse Gear for Bucket Wheel Machine

作　　者：郑宏晔[1] 

机构地区：[1]浙江省电力试验研究院,杭州310014

出　　处：《煤矿机械》2009年第12期173-174,共2页Coal Mine Machinery

摘　　要：发电厂煤场斗轮机回转齿轮发生断齿,根据成分分析、金相检验、硬度测试以及断口形貌分析的结果,认为由于齿轮表面硬化层中淬火裂纹存在,在运行中受较大冲击后发生了冲击断裂,并对防止淬火裂纹提出了建议。The breaking of reverse gear for bucket wheel machine of power plant was investigated by fracture analysis means. The methods of chemical composition analysis, metallographic examination, hardness testing and fracture analysis were carried out to analyze the cracked reverse gear. The results show that gear can＇t subject the collision because of the quenching crack in the surface hard coating. According to analytic result, put forward the suggestion.

关 键 词：回转齿轮 断裂 淬火裂纹 

分 类 号：TG142.41[一般工业技术—材料科学与工程]