[1]张贵锋,邝吉涛,宗 凯,等.铝（铜）/不锈钢异种金属大直径搅拌摩擦钎焊界面组织特征与工具的去膜效果[J].焊管,2019,42(2):11-18.[doi:10.19291/j.cnki.1001-3938.2019.2.003]
　ZHANG Guifeng,KUANG Jitao,ZONG Kai,et al.Interfacial Microstructure Feature and Mechanically Disrupting Oxide Film of Tool during Friction Stir Brazing of Al(Cu)/Stainless Steel Dissimilar Assemblies[J].,2019,42(2):11-18.[doi:10.19291/j.cnki.1001-3938.2019.2.003]
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铝（铜）/不锈钢异种金属大直径搅拌摩擦钎焊
界面组织特征与工具的去膜效果()
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《焊管》[ISSN:1001-3938/CN:61-1160/TE]

卷:
42
期数:
2019年第2期
页码:
11-18
栏目:
试验与研究
出版日期:
2019-02-28

文章信息/Info

Title:
Interfacial Microstructure Feature and Mechanically Disrupting
Oxide Film of Tool during Friction Stir Brazing of
Al(Cu)/Stainless Steel  Dissimilar Assemblies
文章编号:
10.19291/j.cnki.1001-3938.2019.2.003
作者:
张贵锋1; 邝吉涛1; 宗 凯1; 唐英利2
1. 西安交通大学金属材料强度国家重点实验室  焊接研究所，西安 710049；
2. 西安市轻工业研究所，西安 710001
Author(s):
ZHANG Guifeng1;  KUANG Jitao1;  ZONG Kai1;  TANG Yingli2
1. Institute of Welding, State Key Laboratory for Mechanical Behavior of Materials, Xi’an Jiaotong University, Xi’an 710049, China；
2. Xi’an Light Industry Research Institute, Xi’an 710001, China
关键词:
搅拌摩擦焊; 搅拌摩擦钎焊; 异种金属焊接; 剪切强度比; 剪切去膜与混合
Keywords:
friction stir welding;  friction stir brazing;  dissimilar metal joining;  shear strength ratio;  mixing by shear
分类号:
TG456
DOI:
10.19291/j.cnki.1001-3938.2019.2.003
文献标志码:
A
摘要:
为了同时消除搅拌摩擦搭接焊过程中搅拌针的磨损与匙孔、增大单次焊道的焊合面积，开发了无针工具并预置钎料的搅拌摩擦钎焊（FSB）新工艺。为进一步证明FSB可利用旋转工具借助机械途径破除界面氧化膜、改善润湿性，选折了表面氧化膜难破除的不锈钢（SUS）作为下板的两种异质金属组合（Al/SUS与Cu/SUS），采用Φ40 mm大直径无针工具与Zn箔钎料施焊。微观组织分析发现，Al/SUS组合在不锈钢界面侧形成了6~7 μm连续金属间化合物层，并在Al侧形成了约20 μm混有少量粒状物（含Fe）的混合层；特别是铜作上板的Cu/SUS组合，众多粒径约2 μm不锈钢微粒被搅拌混入上板Cu材中，形成厚约5 μm的复合材料式界面层。上述结果表明，FSB无针工具在直接搅拌上板表面的同时，又能间接搅拌焊接界面以破除界面氧化膜；同时界面处的搅拌破膜效果与上板的软化程度、屈服强度等因素有关。
Abstract:
Friction stir brazing（FSB） using a pinless tool and preplaced braze was developed by the present authors to eliminate pin wear and keyhole and to enlarge bonded area for one pass. FSB of Al/stainless steel（Al/SUS） and Cu/stainless steel（Cu/SUS） assemblies（stainless steel as the lower plate） using a large pinless tool（Φ40 mm） and Zn foil braze were performed to clarify the ability of the pinless tool to disrupt oxide film on the surface of the stainless steel. The results of microscopic analysis indicate that the continuous intermetallic compound layer of 6~7 μm of Al/SUS assembly was formed on SUS side, while several Fe-containing particles were embedded into Al side up to 20 μm in thickness direction. Especially for Cu/SUS assembly, a number of small SUS particles of 2 μm size were embedded into Cu matrix, forming a composite structure of 5 μm thickness. The microstructure feature confirmed that the large pinless tool was able to disrupt oxide film on SUS, and the disrupting effect was related to shear strength ratio between top and bottom base metals.

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备注/Memo

备注/Memo:
收稿日期：2018-11-2
基金项目： 陕西省技术创新引导专项（基金）——吸纳成果转化项目“铝厚板与坚硬异种材料的分步搅拌摩擦钎焊法制备双金属复合板”（项目编号2017CGZH—XNGJ—01）。
作者简介：张贵锋（1965—），男，博士，教授，主要研究方向为异种金属搅拌摩擦焊方法、液相扩散焊（TLP）方法、复合材料的先进环保制备方法与钎焊技术。
更新日期/Last Update: 2019-03-20