| 高压油泵出油阀紧座断裂失效分析 |
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| 引用本文： | 许晓磊,于志伟. 高压油泵出油阀紧座断裂失效分析[J]. 机械工程材料, 2006, 30(4): 89-91 |
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| 作者姓名： | 许晓磊 于志伟 |
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| 作者单位： | 大连海事大学金属材料工艺研究所,辽宁,大连,116026 |
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| 摘 要： | 对断裂的汽车柴油机高压出油阀紧座的宏观、微观断口及显微组织进行了研究。结果表明：高压出油阀紧座其圆柱体内凹角根部无过渡圆角及机加工粗糙是导致裂纹萌生、扩展直至发生疲劳断裂的主要原因。
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| 关 键 词： | 失效分析 出油阀紧座 疲劳断裂 |
| 文章编号： | 1000-3738（2006）04-0089-03 |
| 收稿时间： | 2004-12-16 |
| 修稿时间： | 2004-12-162005-03-10 |
Failure Analysis of Injection Valve Nut of Diesel Engine High Pressure Oil Pump |
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| XU Xiao-lei,YU Zhi-wei. Failure Analysis of Injection Valve Nut of Diesel Engine High Pressure Oil Pump[J]. Materials For Mechanical Engineering, 2006, 30(4): 89-91 |
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| Authors: | XU Xiao-lei YU Zhi-wei |
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| Affiliation: | Dalian Maritime University, Dalian 116026, China |
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| Abstract: | The fracture surface of a failed injection valve nut of diesel engine high pressure oil pump was investigated by visual and SEM. The microstructure of the material for the failed injection valve nut was observed. The results show that fatigue fracture had taken place on the injection valve nut. Absence of the transition fillet at the root of the cylinder interior of the failed injection nut should be mainly responsible for the failure of the injection valve nut and the rough machining in the root region was related to the fracture of the injection valve nut. |
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| Keywords: | failure analysis injection valve nut fatigue fracture |
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