| 汽车悬置螺栓断裂失效分析 |
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| 引用本文： | 俞雁,毛新平,兰凤崇,李瑞峰,宋贞桢,赵喆,蒋琼,陶运来,曾肇豪. 汽车悬置螺栓断裂失效分析[J]. 汽车科技, 2012, 0(5): 70-76 |
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| 作者姓名： | 俞雁 毛新平 兰凤崇 李瑞峰 宋贞桢 赵喆 蒋琼 陶运来 曾肇豪 |
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| 作者单位： | 广州汽车集团股份有限公司汽车工程研究院;华南理工大学;广州钢铁集团珠江钢铁公司;华测检测技术股份有限公司上海金属实验室;中联重科股份有限公司 |
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| 摘 要： | 为查找某汽车安装螺栓的断裂原因,对螺栓进行了断口宏观、SEM电镜、化学成分、金相组织分析,并对同批次完整螺栓进行了力学性能测试。在各项理化试验的基础上,结合微观断口的形貌和断裂机理对螺栓的断裂原因进行了分析。结果表明：螺栓螺纹表面存在微裂纹是螺栓断裂的主要原因。
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| 关 键 词： | 螺栓 SCM435 断裂 失效分析 |
Failure Analysis of Automobile Engine Mount Bolt |
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| YU Yan,MAO Xin-ping,LAN Feng-chong,LI Rui-feng,SONG Zhen-zhen,ZHAO Zhe,JIANG Qiong,TAO Yun-lai,ZENG Zhao-hao. Failure Analysis of Automobile Engine Mount Bolt[J]. Automobile Science and Technology, 2012, 0(5): 70-76 |
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| Authors: | YU Yan MAO Xin-ping LAN Feng-chong LI Rui-feng SONG Zhen-zhen ZHAO Zhe JIANG Qiong TAO Yun-lai ZENG Zhao-hao |
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| Affiliation: | 1(1.Guangzhou Automobile Group Co.,LTD Automotive Engineering Institute,Guangzhou 510640,China;2.Guangzhou Zhujiang Iron & Steel Co.,LTD,Guangzhou 510730,China;3.South China University of Technology,Guangzhou 510640,China;4.Centre Testing International,Shanghai lab.,Shanghai 201206,China;5.Zoomlion Co.,Ltd.,Changsha 410205,China) |
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| Abstract: | In order to definite the failure reason of a mounting bolt used in an automobile,the experiments such as appearance examination,morphology and microstructure analysis,SEM micro-morphology analysis,chemical composition analysis and mechanical properties test were carried out.Based on the physics and chemistry experiments,the reasons of the bolts’ fracture were analyzed using micro-fracture mechanism.The results showed that the fracture of the bolts was mainly caused by the tiny crack of the surface. |
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| Keywords: | bolt SCM435 fracture failure analysis |
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