| MB15超塑性镁合金扩散连接试验 |
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| 引用本文： | 于彦东,张凯锋,蒋大鸣,韩文波.MB15超塑性镁合金扩散连接试验[J].焊接学报,2003,24(1):64-68. |
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| 作者姓名： | 于彦东 张凯锋 蒋大鸣 韩文波 |
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| 作者单位： | 哈尔滨工业大学,材料科学与工程学院,哈尔滨,150001 |
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| 摘 要： | 根据原子扩散理论对MBl5超塑性镁合金进行了扩散连接工艺研究。扩散连接试验前采用三种不同方法去除MBl5镁合金表面的氧化膜，从中选出最佳方法。在Gleeble-1500型热／力模拟试验机上，对超塑性MBl5镁合金进行了在不同连接工艺条件下的扩散连接，在电子万能试验机上对扩散连接接头进行了剪切强度试验，从而获得了MBl5超塑性镁合金的最佳扩散连接工艺参数。利用金相显微镜、扫描电镜(SEM)，对扩散连接接头微观组织进行分析，得出了MBl5超塑性镁合金主要是通过原子扩散和晶粒长大造成的原始焊接表面晶界的移动，促使接头表面原子充分扩散，形成牢固的连接。
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| 关 键 词： | 超塑性 扩散连接 镁合金 剪切强度 |
| 文章编号： | 0253-360X(2003)01-64-05 |
| 收稿时间： | 2002/7/19 0:00:00 |
Diffusion bonding of superplastic MB15 magnesium alloy |
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| YU Yan-dong,ZHANG Kai-feng,JIANG Da-ming and HAN Wen-bo.Diffusion bonding of superplastic MB15 magnesium alloy[J].Transactions of The China Welding Institution,2003,24(1):64-68. |
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| Authors: | YU Yan-dong ZHANG Kai-feng JIANG Da-ming and HAN Wen-bo |
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| Affiliation: | School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China,School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China,School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China and School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China |
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| Abstract: | In this paper,research on diffusion bonding of MB15 magnesium alloy was carried out according to atomic diffusion theory.Three kinds of method of removal oxide film of MB15 were used,and the best one was chose.Gleeble-1500 testing machine is used in the diffusion bonding experiment on the superplastic MB15.In addition,shear experiments of welded joints are carried out with electronic universal testing machine,and the optimum diffusion bonding parameters are obtained.The microstructures of the welded joints are analyzed through metallographic microscopy and SEM.It''s deduced that the micro-mechanism of diffusion bonding is the slide of original grain boundaries caused by atom diffusion and the growth of grains of the MB15 superplastic material,sound joint was obtained through sufficient diffusion of the surface atom of the joints. |
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| Keywords: | superplasticity diffusion bonding magnesium alloy shear strength |
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