| 汽车防震器外筒开裂原因 |
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| 引用本文： | 易海清,许玉宇,顾伟,卢书媛,王卫忠.汽车防震器外筒开裂原因[J].理化检验(物理分册),2010(2):138-140. |
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| 作者姓名： | 易海清 许玉宇 顾伟 卢书媛 王卫忠 |
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| 作者单位： | 上海交通大学材料科学与工程学院;常熟出入境检验检疫局; |
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| 摘 要： | 采用宏观分析、化学成分分析、硬度测试、金相检验和能谱分析等方法对材料为STKM12B的机械结构用碳素钢汽车防震器外筒在组装时发生开裂的原因进行了分析。结果表明:外筒开裂为塑性开裂,装配应力过大是造成开裂的外部原因;另材料局部显微组织粗大、晶粒不均匀以及硬度偏低是导致防震器外筒组装时发生开裂的内在原因。
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| 关 键 词： | STKM 12B钢 开裂 显微组织 装配应力 脱碳 晶粒度 |
Cracking Reason Analysis of the Tube Used in Anti-shock Instrument of Automobile |
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| YI Hai-qing,XU Yu-yu,GU Wei,LU Shu-yuan,WANG Wei-zhong.Cracking Reason Analysis of the Tube Used in Anti-shock Instrument of Automobile[J].Physical Testing and Chemical Analysis Part A:Physical Testing,2010(2):138-140. |
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| Authors: | YI Hai-qing XU Yu-yu GU Wei LU Shu-yuan WANG Wei-zhong |
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| Affiliation: | 1/a>;2;1.School of Materials Science and Engineering/a>;Shanghai Jiao Tong University/a>;Shanghai 200240/a>;China/a>;2.Changshu Entry-Exit Inspection and Quarantine Bureau/a>;Changshu 215500/a>;China |
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| Abstract: | By means of chemical composition analysis,hardness test,microstructure examination and SEM/ EDS analysis,the cracking reason of the tube used in anti-shock instrument of automobile during assembling process was analyzed.The result show that the tube cracking was plastic cracking,and too big assembly stress was the major cause for the cracking.Local roase microstructure,asymmetric grain size and low hardness were the other causes which resulted in the cracking when the tube was assembled. |
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| Keywords: | STKM 12B steel cracking microstructure assemble stress decarbonization grain size |
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