Resistance Element Welding with Concealed Rivet Cover Joining 5052 Aluminum Alloy to DP780 Duplex Steel

Wang Yijin; Wang Chao; Dong Shijie; Luo Ping

doi:10.15980/j.tzzz.2020.04.018

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Resistance Element Welding with Concealed Rivet Cover Joining 5052 Aluminum Alloy to DP780 Duplex Steel
Vol. 40, Issue 4, Pages: 426-430(2020)
Published： 2020 ，
DOI： 10.15980/j.tzzz.2020.04.018

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[1]王义金,王超,董仕节,罗平.铝/钢异种金属的沉头铆钉电阻单元焊工艺研究[J].特种铸造及有色合金,2020,40(04):426-430.

Wang Yijin, Wang Chao, Dong Shijie, et al. Resistance Element Welding with Concealed Rivet Cover Joining 5052 Aluminum Alloy to DP780 Duplex Steel. [J]. Special Casting & Nonferrous Alloys 40(4):426-430(2020)
[1]王义金,王超,董仕节,罗平.铝/钢异种金属的沉头铆钉电阻单元焊工艺研究[J].特种铸造及有色合金,2020,40(04):426-430. DOI： 10.15980/j.tzzz.2020.04.018.

Wang Yijin, Wang Chao, Dong Shijie, et al. Resistance Element Welding with Concealed Rivet Cover Joining 5052 Aluminum Alloy to DP780 Duplex Steel. [J]. Special Casting & Nonferrous Alloys 40(4):426-430(2020) DOI： 10.15980/j.tzzz.2020.04.018.

摘要

采用沉头铆钉与沉头孔配合的电阻单元焊工艺连接了钢和铝合金

在Q235/5052Al界面形成了FeAl3金属间化合物。在DP780/Al界面形成了Fe

和FeAl

金属间化合物。焊接电流对熔核直径、拉剪力、铝热影响区平均硬度以及铝板的承载面积有显著影响。确定了3种主要的失效模式:界面失效断裂模型、熔核拔出失效断裂模型和铝热影响区失效断裂模型。在焊接电流为18kA时

获得了最佳的接头力学性能

拉剪力达到5 712N

且失效模式为熔核拔出失效。

Abstract

Resistance element welding（REW）with a concealed rivet cover was used to join steel and aluminum alloy.The intermetallic compound（IMC）of FeAl

is formed at the Q235/Al interface.The IMCs of Fe

and FeAl

are formed at the DP780/Al interface.The welding current has significant influence on the nugget size

peak load

average hardness of aluminum heat affected zone（HAZ）as well as the bearing area of the aluminum plate.Three major failure modes were identified:interfacial failure model

nugget pullout failure model and aluminum HAZ fracture model.At the welding current of 18kA

the desirable mechanical properties of the joint can be obtained at 5 712N with nugget pullout failure model.

关键词

异种金属电阻单元焊微观组织拉剪性能

Keywords

Dissimilar MetalsResistance Element WeldingMicrostructureTensile-Shear Performance

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