| BJ212汽车轮壳螺栓低扭矩断裂分析 |
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| 引用本文： | 张德恩,梁益龙,唐道文,雷旻,魏福庆,张明.BJ212汽车轮壳螺栓低扭矩断裂分析[J].贵州工业大学学报(自然科学版),1999,28(4):41-45. |
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| 作者姓名： | 张德恩 梁益龙 唐道文 雷旻 魏福庆 张明 |
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| 作者单位： | 1. 贵州工业大学,冶金工程系,贵阳,550003
2. 贵州高强度螺栓厂 |
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| 摘 要： | 借助金相、扫描电等手术对低扭矩脆断的ＢＪ２１２汽车轮壳螺栓的金相组织特征，宏观和向量观断口形貌等进行了研究，结果表明，这种头部薄的螺栓，渗层和淬透层过使头我脆断抗力降低，在头部与杆的根部，由于淬火应力不均匀导致根部产生拉应力，均是导致螺栓低扭矩断裂的原因。
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| 关 键 词： | 高强度螺栓 扭矩 断裂 失效分析 |
Falure analysis on the fracture of wheel hull boits of high strength of BJ212 automabile |
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| ZHANG De-en,LIANG Yi-long,TANG Dao-wen,LEI Ming,WEI Fu-qing,ZHANG Ming.Falure analysis on the fracture of wheel hull boits of high strength of BJ212 automabile[J].Journal of Guizhou University of Technology(Natural Science Edition),1999,28(4):41-45. |
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| Authors: | ZHANG De-en LIANG Yi-long TANG Dao-wen LEI Ming WEI Fu-qing ZHANG Ming |
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| Abstract: | By means of metallographical examination and SEM,the microstructure characteristics,macro and microfractographs of the brittle broken wheel hull bolt of BJ212 automobile have been studied The results show that the thin headed screw,with excessively deep carbonitriding layer and hardening layer,has less resistance to brittle fracture in the thin area of its head At the root of the head connecting the stem,a tensile stress may emerge owing to the non even quenching stress Those are the two reasons for low torque fracture of bolt |
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| Keywords: | bolt of high strength torque fracture failure analysis |
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