油泵内溢流阀断裂失效分析
Failure Analysis on Overflow Valve in Oil Pump
高 培, 杨 川, 高国庆, 崔国栋
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作者单位:(西南交通大学 材料科学与工程学院, 四川 成都 610031)
中文关键字:溢流阀; 断裂; 失效分析
英文关键字:overflow valve; fracture; failure analysis
中文摘要:通过对油泵内断裂的溢流阀的化学成分、宏观形貌、金相组织、扫描断口及能谱等进行分析,得出溢流阀断裂是由于其原材料碳化物级别偏高导致热处理过程中形成微裂纹及组织脆化造成的,并对溢流阀原材料及热处理过程的改进提出了建议。
英文摘要:The fracture cause of an overflow valve in the oil pump was analyzed by chemical composition analysis, macrography, metallography, SEM and EDA. The results show that the failure of the overflow valve is caused by microcrack and the structure embrittlement form during the heat treatment process because of the high carbide level of overflow valve. The improvement on raw material and heat treatment of overflow valve is brought forward.