铝/镀锌钢异种金属旁路分流MIG电弧熔钎焊界面区组织与接头性能

苗玉刚; 吴斌涛; 韩端锋; 徐向方

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铝/镀锌钢异种金属旁路分流MIG电弧熔钎焊界面区组织与接头性能

苗玉刚, 吴斌涛, 韩端锋, 徐向方

文章导航 > 焊接学报 > 2014 > 35(9): 6-10

苗玉刚, 吴斌涛, 韩端锋, 徐向方. 铝/镀锌钢异种金属旁路分流MIG电弧熔钎焊界面区组织与接头性能[J]. 焊接学报, 2014, 35(9): 6-10.

引用本文:

苗玉刚, 吴斌涛, 韩端锋, 徐向方. 铝/镀锌钢异种金属旁路分流MIG电弧熔钎焊界面区组织与接头性能[J]. 焊接学报, 2014, 35(9): 6-10.

MIAO Yugang, WU Bintao, HAN Duanfeng, XU Xiangfang. Characteristics of joint and interface layer during bypasscurrent MIG welding-brazing of aluminum and steel dissimilar metals[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2014, 35(9): 6-10.

Citation:

MIAO Yugang, WU Bintao, HAN Duanfeng, XU Xiangfang. Characteristics of joint and interface layer during bypasscurrent MIG welding-brazing of aluminum and steel dissimilar metals[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2014, 35(9): 6-10.

铝/镀锌钢异种金属旁路分流MIG电弧熔钎焊界面区组织与接头性能

1.
哈尔滨工程大学水下机器人技术重点实验室, 哈尔滨 150001
2.
哈尔滨工程大学船舶工程学院, 哈尔滨 150001

基金项目: 国家自然科学基金资助项目(51005049);哈尔滨市高新技术产业专项资金资助项目(ZX2012ZC006015)

Characteristics of joint and interface layer during bypasscurrent MIG welding-brazing of aluminum and steel dissimilar metals

1.
National Key Laboratory of Science and Technology on Underwater Vehicle, Harbin Engineering University, Harbin 150001, China
2.
College of Shipbuilding Engineering, Harbin Engineering University, Harbin 150001, China

摘要: 以2 mm厚6061铝合金与镀锌钢板为试验材料,进行旁路分流MIG电弧熔钎焊工艺试验.采用金相显微镜、扫描电镜和拉伸试验机对接头组织及力学性能进行研究,分析了不同焊接速度时界面层组织和接头性能的变化规律.结果表明,随焊接速度增加焊接热输入减少,界面温度下降,元素扩散速度降低,导致接头界面结合层变薄.另外接头强度随焊接速度与界面层厚度增加呈现先增加后减小的趋势,最高强度达135.32 MPa.当焊接速度较低时,界面温度高,易形成脆性金属间化合物,导致其接头性能下降;高速焊接时,铝/钢界面反应不充分,甚至存在未钎合和气孔等缺陷,影响了接头性能.
- 旁路分流 /
- MIG电弧熔钎焊 /
- 异种金属 /
- 焊接速度 /
- 界面层
Abstract: By pass-current MIG welding-brazing was conducted with 2 mm thick 6061 aluminum alloy plates and galvanized steel plates. The microstructure and mechanical properties of lap joints were investigated by optical microscopy, scanning electron microscope with energy dispersive spectrometer and tensile testing. The effect of welding speed on interface layer and joint characteristics during by pass-current MIG welding-brazing of aluminum alloy to steel was analyzed. The results show that with the increase of welding speed, the welding heat input reduced, and the interface temperature dropped which decreased the diffusion of elements and finally reduced the thickness of interface layer. In addition, the tensile strength of joint tended to increase at first and then reduce with the increase of welding speed, and reached a maximum of 135.32 MPa. When the welding speed was low, the high interface temperature increased the possibility of forming brittle intermetallic compounds which would reduce the performance of the resultant joint. On the contrary, defects such as incomplete brazing and pores in the interface because of insufficient reaction could occur at higher welding speed.
- bypass-current MIG welding-brazing /
- dissimilar metals /
- welding speed /
- interface /

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铝/镀锌钢异种金属旁路分流MIG电弧熔钎焊界面区组织与接头性能

1. 哈尔滨工程大学水下机器人技术重点实验室, 哈尔滨 150001

2. 哈尔滨工程大学船舶工程学院, 哈尔滨 150001

基金项目: 国家自然科学基金资助项目(51005049);哈尔滨市高新技术产业专项资金资助项目(ZX2012ZC006015)

收稿日期: 2014-03-18

关键词:

摘要: 以2 mm厚6061铝合金与镀锌钢板为试验材料,进行旁路分流MIG电弧熔钎焊工艺试验.采用金相显微镜、扫描电镜和拉伸试验机对接头组织及力学性能进行研究,分析了不同焊接速度时界面层组织和接头性能的变化规律.结果表明,随焊接速度增加焊接热输入减少,界面温度下降,元素扩散速度降低,导致接头界面结合层变薄.另外接头强度随焊接速度与界面层厚度增加呈现先增加后减小的趋势,最高强度达135.32 MPa.当焊接速度较低时,界面温度高,易形成脆性金属间化合物,导致其接头性能下降;高速焊接时,铝/钢界面反应不充分,甚至存在未钎合和气孔等缺陷,影响了接头性能.

English Abstract

Characteristics of joint and interface layer during bypasscurrent MIG welding-brazing of aluminum and steel dissimilar metals

1. National Key Laboratory of Science and Technology on Underwater Vehicle, Harbin Engineering University, Harbin 150001, China

2. College of Shipbuilding Engineering, Harbin Engineering University, Harbin 150001, China

Received Date: 2014-03-18

Keywords:

Abstract: By pass-current MIG welding-brazing was conducted with 2 mm thick 6061 aluminum alloy plates and galvanized steel plates. The microstructure and mechanical properties of lap joints were investigated by optical microscopy, scanning electron microscope with energy dispersive spectrometer and tensile testing. The effect of welding speed on interface layer and joint characteristics during by pass-current MIG welding-brazing of aluminum alloy to steel was analyzed. The results show that with the increase of welding speed, the welding heat input reduced, and the interface temperature dropped which decreased the diffusion of elements and finally reduced the thickness of interface layer. In addition, the tensile strength of joint tended to increase at first and then reduce with the increase of welding speed, and reached a maximum of 135.32 MPa. When the welding speed was low, the high interface temperature increased the possibility of forming brittle intermetallic compounds which would reduce the performance of the resultant joint. On the contrary, defects such as incomplete brazing and pores in the interface because of insufficient reaction could occur at higher welding speed.

苗玉刚, 吴斌涛, 韩端锋, 徐向方. 铝/镀锌钢异种金属旁路分流MIG电弧熔钎焊界面区组织与接头性能[J]. 焊接学报, 2014, 35(9): 6-10.

引用本文:

苗玉刚, 吴斌涛, 韩端锋, 徐向方. 铝/镀锌钢异种金属旁路分流MIG电弧熔钎焊界面区组织与接头性能[J]. 焊接学报, 2014, 35(9): 6-10.

Citation:

MIAO Yugang, WU Bintao, HAN Duanfeng, XU Xiangfang. Characteristics of joint and interface layer during bypasscurrent MIG welding-brazing of aluminum and steel dissimilar metals[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2014, 35(9): 6-10.

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铝/镀锌钢异种金属旁路分流MIG电弧熔钎焊界面区组织与接头性能

Characteristics of joint and interface layer during bypasscurrent MIG welding-brazing of aluminum and steel dissimilar metals

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铝/镀锌钢异种金属旁路分流MIG电弧熔钎焊界面区组织与接头性能

1. 哈尔滨工程大学水下机器人技术重点实验室, 哈尔滨 150001 2. 哈尔滨工程大学船舶工程学院, 哈尔滨 150001

English Abstract

Characteristics of joint and interface layer during bypasscurrent MIG welding-brazing of aluminum and steel dissimilar metals

1. National Key Laboratory of Science and Technology on Underwater Vehicle, Harbin Engineering University, Harbin 150001, China 2. College of Shipbuilding Engineering, Harbin Engineering University, Harbin 150001, China

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目录

1. 哈尔滨工程大学水下机器人技术重点实验室, 哈尔滨 150001

2. 哈尔滨工程大学船舶工程学院, 哈尔滨 150001

1. National Key Laboratory of Science and Technology on Underwater Vehicle, Harbin Engineering University, Harbin 150001, China

2. College of Shipbuilding Engineering, Harbin Engineering University, Harbin 150001, China