| Joining of metal bars by a new process of transformation-diffusion brazing |
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| 引用本文： | 张贵锋 张建勋 裴怡. Joining of metal bars by a new process of transformation-diffusion brazing[J]. 中国焊接, 2006, 15(1): 16-19 |
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| 作者姓名： | 张贵锋 张建勋 裴怡 |
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| 作者单位： | Welding Research Institute, Xi＇ an Jiaotong University, Xi ＇ an, 710049. |
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| 摘 要： | Within the bonded interface of metal bars joint produced by conventional solid state bonding process （ such as flash welding, resistance butt welding, friction welding and so on）, the inclusions are often present, which degrade the ductility of joint. A new process of transformation-diffusion brazing is proposed, in which an amorphous foil containing melting point depressant is preplaced between the interfaces to be joined, and the assembly is repeatedly heated/cooled without holding time at peak temperature. A low carbon steel bars, BNi-2 amorphous foil and resistance butt welding machine were used. The results show that surfuce contamination can be disrupted by the dissolution of base metal into molten interlayer in comparison with conventional process, and the ductility of joint can be improved by increasing the times of temperature cycles on line. In addition, transformation-diffusion brazing can be done with relatively simple and inexpensive system in comparison with transient liquid phase bonding.
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| 关 键 词： | 金属条 钎焊 扩散连接 瞬态液相连接 |
Joining of metal bars by a new process of transformation-diffusion brazing |
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| Zhang Guifeng,Zhang Jianxun,Pei Yi. Joining of metal bars by a new process of transformation-diffusion brazing[J]. China Welding, 2006, 15(1): 16-19 |
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| Authors: | Zhang Guifeng Zhang Jianxun Pei Yi |
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| Abstract: | Within the bonded interface of metal bars joint produced by conventional solid state bonding process (such as flash welding,resistance butt welding,friction welding and so on),the inclusions are often present,which degrade the ductility of joint. A new process of transformation-diffusion brazing is proposed,in which an amorphous foil containing melting point depressant is preplaced between the interfaces to be joined,and the assembly is repeatedly heated/cooled without holding time at peak temperature. A low carbon steel bars,BNi-2 amorphous foil and resistance butt welding machine were used. The results show that surface contamination can be disrupted by the dissolution of base metal into molten interlayer in comparison with conventional process,and the ductility of joint can be improved by increasing the times of temperature cycles on line. In addition,transformation-diffusion brazing can be done with relatively simple and inexpensive system in comparison with transient liquid phase bonding. |
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| Keywords: | metal bars inclusion transient liquid phase bonding transformation-diffusion brazing |
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