| 铁路车辆铆钉拉伸断口不平整原因分析 |
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| 引用本文： | 杨川,崔国栋,高国庆.铁路车辆铆钉拉伸断口不平整原因分析[J].金属热处理,2007,32(10):92-94. |
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| 作者姓名： | 杨川 崔国栋 高国庆 |
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| 作者单位： | 西南交通大学,材料学院,四川,成都,610031 |
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| 摘 要： | 采用光学显微镜、扫描电镜对失效铁路车辆铆钉的微观组织与断口进行分析.结果表明,铆钉拉伸断口上产生凸台阶的主要原因是在槽口边缘形成的裂纹扩展到心部之前,又在中心形成新的裂纹,且在这些中心裂纹处发生塑性变形.通过调整热处理工艺与控制材料中夹杂物级别可以解决断口不平问题.
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| 关 键 词： | 铁路车辆 铆钉 拉伸断口 断口不平 铁路车辆 铆钉 拉伸断口 不平整原因 分析 Rivet Railway Vehicle Convexity Tensile Fracture 问题 夹杂物级别 材料 工艺与控制 热处理 调整 塑性变形 发生 中心裂纹 心形 裂纹扩展 |
| 文章编号： | 0254-6051（2007）10-0092-03 |
| 修稿时间： | 2007-04-08 |
Analysis on Tensile Fracture Convexity of Railway Vehicle Rivet |
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| YANG Chuan,CUI Guo-dong,GAO Guo-qing.Analysis on Tensile Fracture Convexity of Railway Vehicle Rivet[J].Heat Treatment of Metals,2007,32(10):92-94. |
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| Authors: | YANG Chuan CUI Guo-dong GAO Guo-qing |
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| Affiliation: | Materials School, Southwest Jiaotong University, Chengdu Sichuan 610031, China |
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| Abstract: | The microstructure and tensile fracture of railway vehicle rivet were analyzed by OM and SEM. The results show that the reasons for tensile fracture convexity of rivet are caused by new cracks formed in center of the rivet before border crack expanding into the center, and plastic deformation in center crack place occurs. The problem of tensile fracture convexity could be solved by optimizing heat treatment technology and controlling grade of inclusion in raw materials. |
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| Keywords: | railway vehicle rivet tensile fracture convexity |
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