| Zn-Al-Ag钎料铜-铝钎焊接头显微组织与力学性能 |
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| 引用本文： | 张满,王鹏飞,张临财,林岳宾. Zn-Al-Ag钎料铜-铝钎焊接头显微组织与力学性能[J]. 焊接学报, 2013, 0(9): 55-58 |
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| 作者姓名： | 张满 王鹏飞 张临财 林岳宾 |
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| 作者单位： | 淮阴工学院机械工程学院, 淮安 223003;淮阴工学院江苏省介入医疗器械研究重点实验室, 淮安 223003,淮阴工学院机械工程学院, 淮安 223003,淮阴工学院江苏省介入医疗器械研究重点实验室, 淮安 223003,淮阴工学院江苏省介入医疗器械研究重点实验室, 淮安 223003 |
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| 基金项目： | 江苏省淮阴工学院青年科研基金资助项目(HGC1017) |
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| 摘 要： | 研究了Ag元素对Zn-Al钎料显微组织的影响,添加Ag元素能够细化Zn-Al钎料显微组织.结合钎焊接头力学性能、钎焊接头显微组织以及断口形貌,分析了Zn-Al-Ag钎料铜-铝钎焊接头的断裂机理.在外力作用下,钎缝显微组织中脆硬的块状CuAl2相与其周围组织难以实现同步协调变形,在CuAl2相边缘容易产生应力集中,从而萌生裂纹源,这是Zn-Al-Ag钎料铜-铝钎焊接头发生断裂的主要原因.添加Ag元素后,钎缝中块状CuAl2相尺寸变小,应力集中倾向降低,对应的钎焊接头强度提高.当Ag元素添加量为3.3%(质量分数)时,钎焊接头强度达到最高,其对应的断口形貌中韧窝状形貌大而深.
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| 关 键 词： | Zn-Al-Ag钎料 铜-铝钎焊 显微组织 力学性能 |
| 收稿时间： | 2012-06-29 |
Microstructure and mechanical properties of Cu/Al joint brazed with Zn-Al-Ag filler metal |
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| ZHANG Man,WANG Pengfei,ZHANG Lincai and LIN Yuebin. Microstructure and mechanical properties of Cu/Al joint brazed with Zn-Al-Ag filler metal[J]. Transactions of The China Welding Institution, 2013, 0(9): 55-58 |
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| Authors: | ZHANG Man WANG Pengfei ZHANG Lincai LIN Yuebin |
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| Affiliation: | Department of Mechanical Engineering, Huaiyin Institute of Technology, Huaian 223003, China;Jiangsu Provincial Key Laboratory for Interventional Medical Devices, Huaiyin Institute of Technology, Huaian 223003, China,Department of Mechanical Engineering, Huaiyin Institute of Technology, Huaian 223003, China,Jiangsu Provincial Key Laboratory for Interventional Medical Devices, Huaiyin Institute of Technology, Huaian 223003, China and Jiangsu Provincial Key Laboratory for Interventional Medical Devices, Huaiyin Institute of Technology, Huaian 223003, China |
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| Abstract: | The effects of Ag on the microstructure of Zn- Al filler metals were studied,and it was found that Ag addition could refine the microstructure of Zn-Al filler metals.The fracture mechanism of brazed joint was analyzed based on the microstructure, mechanical properties and fractograph.The results show that brittle blocky CuAl2 phases could not synchronously and coordinately deform with the surrounding phases under external forces.The stress concentration occurred easily on the boundary of CuAl2 phases and resulted in cracking which led to joint fracture.By adding Ag,the CuAl2 phase became finer and the joint strength increased.When Ag content was 3.3wt.% in the filler metal,the joint strength reached the highest.Meanwhile, the dimples were large and deep in the fractured surface. |
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| Keywords: | Zn-Al-Ag filler metal Cu /Al brazing microstructure mechanical property |
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