| ZG0Cr14Ni5Mo2Cu上位锁支臂断裂原因分析 |
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| 引用本文： | 张硕,孙小岚,康凯.ZG0Cr14Ni5Mo2Cu上位锁支臂断裂原因分析[J].失效分析与预防,2013(1):47-50. |
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| 作者姓名： | 张硕 孙小岚 康凯 |
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| 作者单位： | 中航工业沈阳飞机工业（集团）有限公司,沈阳110850 |
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| 摘 要： | 某型号飞机电缆装配前进行例行检查时,发现ZG0Cr14Ni5Mo2Cu上位锁支臂开裂。通过现场调查、对断裂件的材料成分分析、金相组织观察、断口的宏微观观察、硬度检测以及设计结构、受力及现行工艺等综合分析,以确定该上位锁支臂断裂的性质及产生原因。结果表明:上位锁支臂的断裂为过大的装配应力、校形残余应力与氢共同作用下的氢致脆断造成的。此案例分析中发现了隔板设计结构、校形的残余应力问题,为此提出了合理的改进建议。
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| 关 键 词： | 上位锁支臂 装配应力 残余应力 氢致开裂 |
Cracking Analysis of ZGOCrl4Ni5Mo2Cu Upper Lock Arms |
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| ZHANG Shuo,SUN Xiao-lan,KANG Kai.Cracking Analysis of ZGOCrl4Ni5Mo2Cu Upper Lock Arms[J].Failure Analysis and Prevention,2013(1):47-50. |
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| Authors: | ZHANG Shuo SUN Xiao-lan KANG Kai |
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| Affiliation: | ( AVIC Shenyang Aircraft Industry Group Corporation, Shenyang 110850, China) |
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| Abstract: | ZGOCrl4Ni5Mo2Cu upper lock arms were found to have crack during routine inspection. The cracking cause and character were analyzed by chemical composition analysis, macro and micro observation of fracture surface, hard testing, combined with comprehensive analysis on design structure, residual stress, and the current process. The results indicate that the failure mode is hydrogen induced cracking. The co-effect of greater assembly stress and correction residual stress and hydrogen resulted in the crack of the arms. Some suggesfions were put forward to improve clapboard design structure and adjust residual |
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| Keywords: | upper lock arms assembly stress residual stress hydrogen embrittlement |
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