| 铁塔脚钉断裂失效分析 |
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| 引用本文： | 郝德中,李伟航,谷志刚.铁塔脚钉断裂失效分析[J].辽宁工程技术大学学报(自然科学版),2010,29(6). |
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| 作者姓名： | 郝德中 李伟航 谷志刚 |
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| 作者单位： | 1. 辽宁工业大学,辽宁,锦州,121001
2. 锦州石化公司,辽宁,锦州,121001 |
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| 基金项目： | 辽宁省科技攻关资助项目(2008219014) |
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| 摘 要： | 针对某高压输电铁塔上的脚钉在人员登塔时发生断裂问题,采用化学成分、力学性能、宏观、金相以及扫描电镜分析等方法,对的断裂原因进行了研究与分析。研究结果表明,铁塔脚钉的断裂与脚钉的材质质量及加工方法无关,而是由于在施工过程中对脚钉螺栓使用了过大的预紧力,造成了脚钉在螺纹沟底发生了先期开裂,施工时的低温也增大了脚钉脆断倾向。研究结论否定了习惯上只注重在材料质量方面查找断裂失效原因的倾向,强调了严格施工的重要性。
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| 关 键 词： | 铁塔脚钉 预紧力 断口 断裂 |
Failure analyses on foot nails of power iron tower |
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| HAO Dezhong,LI Weihang,GU Zhigang.Failure analyses on foot nails of power iron tower[J].Journal of Liaoning Technical University (Natural Science Edition),2010,29(6). |
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| Authors: | HAO Dezhong LI Weihang GU Zhigang |
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| Institution: | HAO Dezhong1,LI Weihang2,GU Zhigang1(1.Liaoning University of Technology,Jinzhou 121001,China,2.Jinzhou Petrochemical Company,Jinzhou 121001 China) |
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| Abstract: | The foot nails,which were installed recently on a high-voltage power iron tower,were broken unexpectedly as the maintenance persons were climbing the iron tower.The failure analyses of the foot nails rupture were conducted by means of the chemical composition,mechanical properties,macrostructure,metallographic,and EDS.The results show that the failure was not caused by their material composition and machining,but resulted from the excessive preload.During the installation of the foot nails,the preload was a... |
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| Keywords: | foot nail for iron tower preload fracture rupture |
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