| 内燃机车用柴油机连杆螺钉断裂分析 |
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| 引用本文： | 崔冬芳,胡智博,王艳华.内燃机车用柴油机连杆螺钉断裂分析[J].理化检验(物理分册),2011(3):172-174,195. |
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| 作者姓名： | 崔冬芳 胡智博 王艳华 |
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| 作者单位： | 铁道部产品质量监督检验中心; |
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| 摘 要： | 内燃机车在检修重组后运行约一个月,其柴油机的两根连杆螺钉发生断裂。采用化学成分分析、硬度测试、断口分析和金相检验等方法,对两螺钉断裂的原因进行了分析。结果表明:两螺钉的断裂均为疲劳型断裂,其中一根螺钉先行断裂,其断裂的根本原因可能是螺钉紧固处于不合理的状态所致。
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| 关 键 词： | 内燃机车 柴油机 连杆螺钉 疲劳断裂 紧固 |
Fracture Analysis of Connecting Rod Bolts of Diesel Engine for Internal Combustion Locomotive |
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| CUI Dong-fang,HU Zhi-bo,WANG Yan-hua.Fracture Analysis of Connecting Rod Bolts of Diesel Engine for Internal Combustion Locomotive[J].Physical Testing and Chemical Analysis Part A:Physical Testing,2011(3):172-174,195. |
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| Authors: | CUI Dong-fang HU Zhi-bo WANG Yan-hua |
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| Affiliation: | CUI Dong-fang,HU Zhi-bo,WANG Yan-hua(Product Quality Supervision and Inspection Center of MOR,Beijing 100081,China) |
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| Abstract: | Two connecting rod bolts of diesel engine fractured when the internal combustion locomotive operated for one month after maintenance and recombinant.The fracture reason was analyzed by means of chemical composition analysis,hardness testing,fracture analysis,metallographic examination and so on.The results showed that both bolts characterized in fatigue fracture,one of which gave the priority over another,and the fracture might be due to the unreasonable bolt prefixing. |
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| Keywords: | internal combustion locomotive diesel engine connecting rod bolt fatigue fracture prefixing |
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