| Q345D方管折弯开裂的原因分析 |
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| 引用本文： | 刘雪民,刘炳,马正伟.Q345D方管折弯开裂的原因分析[J].中国材料科技与设备,2009,6(1):57-58. |
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| 作者姓名： | 刘雪民 刘炳 马正伟 |
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| 作者单位： | 新疆大学机械工程学院,新疆乌鲁木齐830000 |
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| 基金项目： | 基金项目：新疆维吾尔自治区高校科研计划科学研究重点项目（XJEDU2006111） |
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| 摘 要： | Q345D钢板，在折弯成方管时，出现了焊缝对应面一侧的裂纹，利用金相显微镜进行组织分析，光谱仪测定成分，拉伸实验机测定力学性能等分析方法对试样进行了分析。分析表明：折弯开裂的主要原因是由于钢板材料的夹杂物过多、强度偏高、塑性偏低造成的。
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| 关 键 词： | 折弯开裂 夹杂物 裂纹 金相分析 |
The Cause Analysis of Bending Crack on Q345D of Square Tube |
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| LIU Xue-min,LIU Bing,MA Zheng-wei.The Cause Analysis of Bending Crack on Q345D of Square Tube[J].Chinese Materials Science Technology & Equipment,2009,6(1):57-58. |
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| Authors: | LIU Xue-min LIU Bing MA Zheng-wei |
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| Affiliation: | (College of Mechanical Engineering Xinjing University, Xinjiang, Wulumuqi,830000,China) |
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| Abstract: | The cracked on the opposite side of the sample of Q235A square tube bending were examined by smetallograhic microscope,ingredients were measured by Spectroscopy, mechanical properties were tested by Tensile test machine . Test shows that the cracked samples have more inclusions and strength , low plasticity, they are the main reason of cracking in Q235A square tube when cold bending. |
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| Keywords: | Bending crack Inclusion Crack Metallurgical analysis |
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