| 某氢气往复式压缩机连接螺栓的断裂原因 |
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| 引用本文： | 陆颜,谈金祝,李洋,王超,罗盛华.某氢气往复式压缩机连接螺栓的断裂原因[J].机械工程材料,2021,45(1):105-108. |
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| 作者姓名： | 陆颜 谈金祝 李洋 王超 罗盛华 |
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| 作者单位： | 南京工业大学机械与动力工程学院,南京 211816;南京工业大学机械与动力工程学院,南京 211816;南京工业大学机械与动力工程学院,南京 211816;南京工业大学机械与动力工程学院,南京 211816;中国石油化工股份有限公司金陵分公司,南京 210033 |
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| 摘 要： | 某氢气往复式压缩机在正常工作一段时间后,其连接螺栓发生断裂.通过断口宏观与微观形貌观察、化学成分分析、显微组织观察、力学性能测试等方法,对该连接螺栓的断裂原因进行分析.结果表明:该连接螺栓的断裂性质为低应力高周疲劳断裂.在交变载荷作用下,微裂纹在螺栓螺纹根部高应力集中区域萌生;螺栓热处理不当导致形成回火索氏体、上贝氏体...
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| 关 键 词： | 连接螺栓 疲劳断裂 应力集中 回火索氏体 力学性能 |
Fracture Cause of Connecting Bolts in a Hydrogen Reciprocating Compressor |
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| LU Yan,TAN Jinzhu,LI Yang,WANG Chao,LUO Shenghua.Fracture Cause of Connecting Bolts in a Hydrogen Reciprocating Compressor[J].Materials For Mechanical Engineering,2021,45(1):105-108. |
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| Authors: | LU Yan TAN Jinzhu LI Yang WANG Chao LUO Shenghua |
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| Affiliation: | (College of Mechanical and Power Engineering,Nanjing Tech University,Nanjing 211816,China;Sinopec Jinling Company,Nanjing 210033,China) |
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| Abstract: | The connecting bolts in a hydrogen reciprocating compressor were ruptured after woking normally for a period of time.The fracture cause of the bolts was investigated by fracture macro-and micro-morphology observation,chemical composition analysis,microstructure observation and mechanical property tests.The results show that the fracture mode of the bolts was low stress high cycle fatigue fracture.Under alternating stresses,some microcracks originated from the high stress concentration position at the root of the screw thread of the bolt.Improper heat treatment resulted in the mixed structure of tempered sorbite,upper bainite and ferrite,leading to the decrease of the strength and hardness of the bolts and the acceleration of fatigue crack propagation.Fianlly the fatigue fracture of connecting bolts occurred. |
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| Keywords: | connecting bolt fatigue fracture stress concentration tempered sorbite mechanical property |
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