| LT-3铝合金真空钎焊钎缝微观组织分析 |
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| 引用本文： | 冯涛,楼松年,李亚江. LT-3铝合金真空钎焊钎缝微观组织分析[J]. 机械工程材料, 2005, 29(6): 44-47 |
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| 作者姓名： | 冯涛 楼松年 李亚江 |
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| 作者单位： | 1. 上海交通大学材料科学与工程学院,上海,200030
2. 山东大学材料科学与工程学院,山东济南,250061 |
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| 摘 要： | 对LT-3铝合金真空钎焊工艺进行了研究，利用显微硬度仪、扫描电镜和X射线衍射仪对未焊接母材和钎缝中生成的相和组织进行了分析，并对钎焊接头的断口形貌进行了分析。结果表明：钎缝的显微硬度平均值要比芯层显微硬度的平均值高24．5MHV；钎缝中生成了网状的共晶组织和多种新的金属间化合物；钎缝断裂过程属于混合断裂，断口界面上可以看到多种断裂形貌。
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| 关 键 词： | LT-3铝合金 真空钎焊 显微组织 |
| 文章编号： | 1000-3738(2005)06-0044-04 |
Microstructure of Vacuum Brazing Joint of LT-3 Aluminum Alloy |
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| FENG Tao,LOU Song-nian,LI Ya-jiang. Microstructure of Vacuum Brazing Joint of LT-3 Aluminum Alloy[J]. Materials For Mechanical Engineering, 2005, 29(6): 44-47 |
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| Authors: | FENG Tao LOU Song-nian LI Ya-jiang |
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| Abstract: | The vacuum brazing technique for LT-3 aluminum alloy was studied. The microstructure of the un-welded base metal and the welding joint was analyzed by means of micro-hardness, scanning electron microscopy (SEM) and X-ray diffractometry (XRD). The fracture of the brazing joint was also analyzed. The micro-hardness value of the brazing joint was about 24. 5 MHV higher than that of the core metal There were net-shape eutectic structure and many new intermetallic compounds formed in the brazing joint The fracture analysis indicated that the fracture process belonged to a mixed fracture. |
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| Keywords: | LT-3 aluminum alloy vacuum brazing microstructure |
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