| 汽车板簧的断裂分析 |
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| 引用本文： | 张小荣,唐绍玉,吴贵根,姜起东.汽车板簧的断裂分析[J].理化检验(物理分册),2008,44(5):258-260. |
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| 作者姓名： | 张小荣 唐绍玉 吴贵根 姜起东 |
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| 作者单位： | 奇瑞汽车有限公司,试验技术中心,芜湖,241009 |
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| 摘 要： | 汽车板簧在路试中出现早期疲劳断裂。采用化学成分分析、硬度测试、断口分析和金相检验等方法对断裂的汽车板簧进行了分析。结果表明，焊接时，飞溅的熔滴在板簧表面形成烧伤坑并形成淬火马氏体及淬火裂纹，在路试中产生应力集中而成为疲劳源，在交变应力作用下使裂纹扩展而最终断裂。
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| 关 键 词： | 汽车板簧 焊接飞溅 疲劳 |
| 文章编号： | 1001-4012(2008)05-0258-03 |
| 修稿时间： | 2007年7月18日 |
FRACTURE ANALYSIS OF BAND SPRINGS |
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| ZHANG Xiao-rong,TANG Shao-yu,WU Gui-gen,JIANG Qi-dong.FRACTURE ANALYSIS OF BAND SPRINGS[J].Physical Testing and Chemical Analysis Part A:Physical Testing,2008,44(5):258-260. |
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| Authors: | ZHANG Xiao-rong TANG Shao-yu WU Gui-gen JIANG Qi-dong |
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| Affiliation: | (Test Technology Center of Chery Automobile Co. Ltd. , Wuhu 241009, China) |
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| Abstract: | The early fatigue fracture of band springs appeared in the road testing and the fracture reasons were analyzed by means of chemical composition analysis, hardness measurement, fracture analysis and metallographic examination. The results showed that welding spatter would form a series of micropores and quenching marstensite and quenching cracks as a result of burning. Accordingly, the obtained stress concentration was the original fatigue source. Under the function of stress alternation, the micro crack expanded until fracture. |
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| Keywords: | Band springs Welding spatter Fatigue |
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