| 铝合金/不锈钢钨极氩弧熔-钎焊接头界面层的微观结构分析 |
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| 引用本文： | 林三宝,宋建岭,杨春利,马广超.铝合金/不锈钢钨极氩弧熔-钎焊接头界面层的微观结构分析[J].金属学报,2009,45(10). |
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| 作者姓名： | 林三宝 宋建岭 杨春利 马广超 |
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| 作者单位： | 哈尔滨工业大学现代焊接生产技术国家重点实验室,哈尔滨,150001 |
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| 基金项目： | 国家自然科学基金项目50874033;;中国机械工程学会焊接学会创新思路预研奖学金A类课题项目资助~~ |
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| 摘 要： | 运用OM,SEM和EDS分析了铝合金/不锈钢TIG熔-钎焊接头界面层的结构特征,并通过微压痕和SEM原位拉伸实验测试了其力学性能.研究结果表明:界面处形成了厚度不均一的锯齿状金属间化合物层,厚度为4—9μm,满足界面层的要求(≤10μm);界面反应层包括两类化合物层,即焊缝一侧的τ5层和钢基体一侧θ+η+τ5层,在界面处首先形成τ5相,抑制了粗大枝晶状θ+η二元相的生长.微压痕测试得出:τ5层平均硬度值为HV1025,θ+η+τ5层硬度值为HV835.τ5层压痕处产生裂纹,表明τ5相是一种硬脆相.SEM原位拉伸实验显示,界面层起裂于θ+η相,在外力作用下沿θ+η+τ5层迅速开裂,界面层抗拉强度达到120 MPa.
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| 关 键 词： | 铝合金 不锈钢 钨极氩弧熔-钎焊 界面层 金属间化合物 |
MICROSTRUCTURE ANALYSIS OF INTERFACIAL LAYER WITH TUNGSTEN INERT GAS WELDING-BRAZING JOINT OF ALUMINUM ALLOY/STAINLESS STEEL |
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| LIN Sanbao,SONG Jianling,YANG Chunli,MA Guangchao.MICROSTRUCTURE ANALYSIS OF INTERFACIAL LAYER WITH TUNGSTEN INERT GAS WELDING-BRAZING JOINT OF ALUMINUM ALLOY/STAINLESS STEEL[J].Acta Metallurgica Sinica,2009,45(10). |
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| Authors: | LIN Sanbao SONG Jianling YANG Chunli MA Guangchao |
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| Affiliation: | LIN Sanbao,SONG Jianling,YANG Chunli,MA Guangchao State Key Laboratory of Advanced Welding Production Technology,Harbin Institute of Technology,Harbin 150001 |
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| Abstract: | Against the background of the required weight reduction in transportation through lightweight construction,the application of hybrid structures,where aluminum alloy and steel are jointed together,has a high technical and economical potential.But jointing of material combinations of aluminum alloy and steel is problematic by fusion welding since brittle intermetallic compounds (IMCs) are formed between aluminum alloy and steel.Nowadays,tungsten inert gas(TIG) welding-brazing offers a great potential for alum... |
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| Keywords: | aluminum alloy stainless steel tungsten inert gas welding-brazing interfacial layer intermetallic compound |
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