Dissimilar metal joining of aluminum to steel by MIG arc brazing using flux cored wire

被引：97

作者：

Murakami, T ^{[1
]}

Nakata, K

Tong, HJ

Ushio, M

机构：

[1] Osaka Univ, Joining & Welding Res Inst, Ibaraki, Osaka 5670047, Japan

[2] DAIHEN Corp, Welding Res & Mech Engn Dept, Osaka 5660021, Japan

来源：

ISIJ INTERNATIONAL | 2003年 / 43卷 / 10期

关键词：

dissimilar metal joining; arc brazing; aluminum; steel; intermetallic compound;

D O I：

10.2355/isijinternational.43.1596

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

Dissimilar metal joining of aluminum to steel, which is difficult due to the formation of the brittle intermetallic compound at the interface of the welded joint, by DC pulsed MIG arc brazing in a lap joint with the flux cored AI-Si filler wire has been investigated for the application of the weight saving of automobiles. The major compound formed at the interface between steel and weld metal was determined to be Al7.4Fe2Si as the Al-Fe-Si ternary compound. The composition control of weld metal can suppress the growth of the intermetallic compound layer less than the thickness of 2.5 mum. In this condition, the transverse tensile strength of the welded joint was about 80 MPa, 70 % of that of Al base metal due to the fracture at HAZ on the aluminum side. The mechanism of the suppressed growth of the intermetallic compound layer during MIG arc brazing has been discussed.

引用

页码：1596 / 1602

页数：7

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