| 不锈钢螺柱的断裂失效现象及机制探讨 |
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| 引用本文： | 曹洪治,桑玮玮,马峰,陈华辉.不锈钢螺柱的断裂失效现象及机制探讨[J].润滑与密封,2011(8). |
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| 作者姓名： | 曹洪治 桑玮玮 马峰 陈华辉 |
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| 作者单位： | 中国矿业大学(北京)机电与信息工程学院材料系;河南工程学院机械工程系; |
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| 基金项目： | 中国矿业大学(北京)青年科研基金资助项目 |
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| 摘 要： | 研究常用螺柱的断裂失效现象。采用扫描电子显微镜(SEM)Hitachi S-3400N对螺柱断口形貌进行观察,采用能谱仪(EDX)对第二相夹杂物进行分析;对螺柱进行受力分析,确定扭转断裂所需的应力,发现螺柱在低于其正常切应力状态下发生了扭转断裂失效;通过应力计算、形貌观察分析螺柱的断裂失效过程机制及失效机制。结果表明:存在于螺纹表面上的裂纹是导致螺柱扭转断裂的主要原因,即在长期使用过程中,螺柱表面因疲劳产生微裂纹,在剪切外力作用下,微裂纹扩展,导致螺柱在低于正常应力状态下,发生了断裂失效。断裂过程中,材料发生了剪切、拉伸、摩擦等现象。
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| 关 键 词： | 材料失效与保护 不锈钢 断裂 疲劳 |
Fracture Failure Analysis of Stainless Steel Bolt |
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| Cao Hongzhi Sang Weiwei Ma Feng Chen Huahui,Beijing ,China.Fracture Failure Analysis of Stainless Steel Bolt[J].Lubrication Engineering,2011(8). |
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| Authors: | Cao Hongzhi Sang Weiwei Ma Feng Chen Huahui Beijing China |
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| Affiliation: | Cao Hongzhi1 Sang Weiwei2 Ma Feng1 Chen Huahui1(1.Mechanical Electronic & Information Engineering School,China University of Mining & Technology(Beijing),Beijing 100083,China,2.The Department of Mechanical Engineering,Henan Institute of Engineering,Zhengzhou Henan 451191,China) |
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| Abstract: | The fracture failure of the bolt in common use was studied.The patterns of the fracture surface and the second phase impurities were studied with SEM(Scanning Electron Microscope)and EDX(Energy Dispersive X-ray Analysis).The stress resulted in the the fracture of bolt was determined by mechanics analysis,it was found that the fracture failure happened under the normal shear stress.The failure process and mechanism of the bolt were analyzed through the morphology observation and stress calculation.The result... |
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| Keywords: | failure and protection stainless steel abruption fatigue |
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