| 铝/钢异种金属火焰钎焊接头组织和性能 |
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| 引用本文： | 杨金龙,薛松柏,薛鹏,戴玮,吕兆萍,张满.铝/钢异种金属火焰钎焊接头组织和性能[J].焊接学报,2015,36(1):63-66. |
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| 作者姓名： | 杨金龙 薛松柏 薛鹏 戴玮 吕兆萍 张满 |
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| 作者单位： | 1.南京航空航天大学材料科学与技术学院, 南京 210016 |
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| 基金项目： | 国家自然科学基金资助项目(51375233) |
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| 摘 要： | 通过扫描电镜、能谱分析和X射线衍射等方法研究了火焰钎焊时Zn-xAl钎料的润湿性能、铝/钢钎焊接头界面显微组织、金属间化合物层以及接头抗剪强度.结果表明,Zn-xAl钎料配合改性CsF-RbF-AlF3钎剂,可以有效地去除母材表面氧化膜,从而提高钎焊接头力学性能.随着Al元素含量增加,钎料铺展性和填缝性随之提高,但是钎焊接头强度先升后降,Al元素含量为15%时,钎焊接头力学性能最佳.钎焊接头显微组织分析结果表明,金属间化合物主要为Fe4Al13相. Zn-xAl钎料中Al元素含量较低时,界面层由富锌相和Fe4Al13相组成.随着Al元素含量的增加,在Zn-25Al钎焊接头界面出现第二层金属间化合物Fe2Al5相.
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| 关 键 词： | 火焰钎焊 铝合金 不锈钢 显微组织 抗剪强度 |
| 收稿时间： | 2014/10/9 0:00:00 |
Microstructure and mechanical properties of aluminum/stainless steel brazed joint with torch brazing |
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| YANG Jinlong,XUE Songbai,XUE Peng,DAI Wei,LV Zhaoping and ZHANG Man.Microstructure and mechanical properties of aluminum/stainless steel brazed joint with torch brazing[J].Transactions of The China Welding Institution,2015,36(1):63-66. |
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| Authors: | YANG Jinlong XUE Songbai XUE Peng DAI Wei LV Zhaoping and ZHANG Man |
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| Affiliation: | 1.College of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China2.Zhejiang Xinrui Welding Material Company Limited, Shengzhou 312452, China3.College of Mechanical Engineering, Huaiyin Institute of Technology, Huaian 223003, China |
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| Abstract: | The wettability, microstructure, intermetallic compound (IMC) layer and mechanical properties of aluminum/stainless steel joints brazed with Zn-xAl filler metals were investigated by means of scanning electron microscope, energy dispersive X-ray spectrometer and X-ray diffraction. The results indicate that the oxide film on the base metal could be effectively removed by the modified CsF-RbF-AlF3 flux, and the excellent mechanical properties of the brazed joints were obtained. The spreading area as well as the clearance filling ability of Zn-xAl filler metal was both improved with by increasing the content of Al in the filler metals. However, the shear strength of the joint increased first and decreased afterwards, and the best mechanical property of brazed joint is obtained when the content of Al is 15%. It has been found that when the content of Al is low, the interfacial layer is composed of Zn-rich and Fe4Al13 phase. As for the excessive amount of Al, additional Fe2Al5 phase is visible at the interface. |
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| Keywords: | torch brazing aluminum stainless steel microstructure shear strength |
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