| 316L板翅结构钎焊接头力学性能试验 |
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| 引用本文： | 舒双文,周帼彦,陈兴.316L板翅结构钎焊接头力学性能试验[J].焊接学报,2016,37(12):83-86. |
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| 作者姓名： | 舒双文 周帼彦 陈兴 |
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| 作者单位： | 华东理工大学 机械与动力工程学院 承压系统与安全教育部重点实验室, 上海 200237 |
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| 摘 要： | 采用高温短时拉伸试验和相应数学模型分析研究了316L T形钎焊接头的力学性能.使用扫描电镜（SEM）和能谱分析（EDS）分析了失效钎焊接头裂纹尖端和焊缝区域的微观组织及性能，进一步探讨了板翅钎焊结构的失效机理.结果表明，基于T形板试样的高温拉伸载荷位移曲线能较好地反映焊缝的起裂和裂纹扩展过程，1~2 mm/min为合理的试验加载速率取值范围；钎焊过程中焊缝区会出现明显的铁元素富集现象，为板翅结构高温失效的主要诱因.
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| 关 键 词： | 钎焊 力学性能 微观组织 失效机理 断裂能 |
| 收稿时间： | 2014/12/11 0:00:00 |
Experimental study on mechanical properties of 316L brazed joints |
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| SHU Shuangwen,ZHOU Guoyan and CHEN Xing.Experimental study on mechanical properties of 316L brazed joints[J].Transactions of The China Welding Institution,2016,37(12):83-86. |
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| Authors: | SHU Shuangwen ZHOU Guoyan and CHEN Xing |
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| Affiliation: | Key Laboratory of Pressure Systems and Safety(MOE), School of Mechanical and Power Engineering, East China University of Science & Technology, Shanghai 200237, China |
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| Abstract: | The mechanical properties of 316L brazed joints were studied by using high temperature tensile test and mathematical model analysis. To get a good understanding of the failure mechanism of brazed structure, the microstructures of crack tip and brazed seamwere studied. The results indicate that the load-displacement curves match the process of crack initializing and propagating clearly. And the suitable testing rate range is 1mm/min~2mm/min. Furthermore, the concentration phenomenon of Fe is the main cause of the fracture in plate-fin structure. |
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| Keywords: | brazing mechanical properties microstructure failure mechanism fracture of energy |
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