| 65Mn弹簧垫圈断裂分析 |
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| 引用本文： | 张跃飞,陈林,刘艳稳. 65Mn弹簧垫圈断裂分析[J]. 失效分析与预防, 2012, 7(1): 43-45,49 |
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| 作者姓名： | 张跃飞 陈林 刘艳稳 |
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| 作者单位： | 1. 中国人民解放军驻一六二厂军事代表室,贵州安顺,561018
2. 中航工业贵州贵航飞机设计研究所,贵州安顺,561018 |
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| 摘 要： | 直径为4 mm的65Mn弹簧垫圈镀银后,在装配时发生了断裂。对失效件的宏观、微观特征进行观察,并对失效件的化学成分、金相组织及氢含量进行了测定。结果表明:弹簧垫圈在酸洗、电镀过程中零件内部渗入了氢,镀后未及时除氢且除氢时间不足,致使在外力的作用下垫圈发生氢脆断裂。在明确失效原因后,采取了针对性措施如增加除氢时间等,彻底避免了类似问题的发生。
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| 关 键 词： | 弹簧垫圈 镀银 沿晶断裂 氢脆 |
Failure Analysis of 65Mn Spring Washer Fracture |
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| ZHANG Yue-fei , CHEN Lin , LIU Yan-wen. Failure Analysis of 65Mn Spring Washer Fracture[J]. Failure Analysis and Prevention, 2012, 7(1): 43-45,49 |
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| Authors: | ZHANG Yue-fei CHEN Lin LIU Yan-wen |
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| Affiliation: | 1. The PLA Military Representation Office in No. 162 Factory, Guizhou Anshun 561018, China; 2. A VIC Aircraft Design and Research Institute of GAIG, Guizhou Anshun 561018, China) |
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| Abstract: | A spring washer made from 65Mn spring steel fractured during assembling after silver plating. In order to find out the failure mode and cause, macro and micro observation, chemical composition analysis, microstructure examination and hydrogen content testing were carried out. The results show that the failure mode of the spring washer is hydrogen brittleness fracture. Hydrogen infiltrated into the spring washer during the process of acidwashing and plating and wasn＇ t gotten rid of in time after plating and the dehydrogenation time wasn＇ t enough. As a result, the spring washer fractured during assembling under the effect of hydrogen embrittlement and assembling stress. Prolonging dehydrogenation time can be adopted to solve the problem. |
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| Keywords: | spring washer silver plating intergranular fracture hydrogen embritfiement |
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