| 自卸车前桥断裂分析 |
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| 引用本文： | 谭国良,杨浩义,杨冬梅,谭琦瑛.自卸车前桥断裂分析[J].理化检验(物理分册),2008,44(9):498-500. |
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| 作者姓名： | 谭国良 杨浩义 杨冬梅 谭琦瑛 |
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| 作者单位： | 湖北省机电研究设计院,武汉430070 |
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| 摘 要： | 某自卸车前桥在使用过程中断裂。采用宏、微观检验、力学性能测试以及化学成分分析等方法对断裂前桥进行了分析。检验结果表明，前桥的断裂属于脆性断裂，断裂起源于前桥工字梁前侧焊接处。由于在前桥上焊接钢带时，在焊接热影响区产生了高硬度的马氏体和焊接裂纹，从而导致前桥受力时产生脆性断裂。
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| 关 键 词： | 前桥 焊接接头 焊接裂纹 脆性断裂 |
FRACTURE ANALYSIS OF FRONT AXLE OF DUMP TRUCK |
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| TAN Guo-liang,YANG Hao-yi,YANG Dong-mei,TAN Qi-ying.FRACTURE ANALYSIS OF FRONT AXLE OF DUMP TRUCK[J].Physical Testing and Chemical Analysis Part A:Physical Testing,2008,44(9):498-500. |
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| Authors: | TAN Guo-liang YANG Hao-yi YANG Dong-mei TAN Qi-ying |
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| Affiliation: | (Hubei Design and Research Institute of Machinery and Electronic Engineering, Wuhan 430070, China) |
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| Abstract: | The front axle of a dump truck broke in service. The chemical composition, microstructure and fractography of the failure axle were analyzed. The results indicated that it was a brittle fracture, and the fracture occured in the weld point on the axle where the steel belt was welded on. The high hardness martensite and the welded crack had been found in the weld point and which caused the brittle fracture of the front axle. |
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| Keywords: | Front axle welded joint welded crack brittle fracture |
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