Dissimilar Metal Joining of Aluminum to Steel by MIG Arc Brazing Using Flux Cored Wire

Taichi Murakami; Kazuhiro Nakata; Hongjun Tong; Masao Ushio

doi:10.2355/isijinternational.43.1596

Dissimilar Metal Joining of Aluminum to Steel by MIG Arc Brazing Using Flux Cored Wire

Taichi Murakami, Kazuhiro Nakata, Hongjun Tong, Masao Ushio

ENV - Frontier Science for Advanced Environment

Research output: Contribution to journal › Article › peer-review

120 Citations (Scopus)

Abstract

Dissimilar metal joining of aluminum to steel, which is difficult due to the formation of the brittle inter-metallic compound at the interface of the welded joint, by DC pulsed MIG arc brazing in a lap joint with the flux cored Al-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 Al_7.4Fe₂Si 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 μm. In this condition, the transverse tensile strength of the welded joint was about 80 MPa, 70 % of that of AI 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.

Original language	English
Pages (from-to)	1596-1602
Number of pages	7
Journal	ISIJ International
Volume	43
Issue number	10
DOIs	https://doi.org/10.2355/isijinternational.43.1596
Publication status	Published - 2003

Keywords

Aluminum
Arc brazing
Dissimilar metal joining
Intermetallic compound
Steel

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10.2355/isijinternational.43.1596

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title = "Dissimilar Metal Joining of Aluminum to Steel by MIG Arc Brazing Using Flux Cored Wire",

abstract = "Dissimilar metal joining of aluminum to steel, which is difficult due to the formation of the brittle inter-metallic compound at the interface of the welded joint, by DC pulsed MIG arc brazing in a lap joint with the flux cored Al-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 μm. In this condition, the transverse tensile strength of the welded joint was about 80 MPa, 70 % of that of AI 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.",

keywords = "Aluminum, Arc brazing, Dissimilar metal joining, Intermetallic compound, Steel",

author = "Taichi Murakami and Kazuhiro Nakata and Hongjun Tong and Masao Ushio",

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AU - Murakami, Taichi

AU - Nakata, Kazuhiro

AU - Tong, Hongjun

AU - Ushio, Masao

PY - 2003

Y1 - 2003

N2 - Dissimilar metal joining of aluminum to steel, which is difficult due to the formation of the brittle inter-metallic compound at the interface of the welded joint, by DC pulsed MIG arc brazing in a lap joint with the flux cored Al-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 μm. In this condition, the transverse tensile strength of the welded joint was about 80 MPa, 70 % of that of AI 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.

AB - Dissimilar metal joining of aluminum to steel, which is difficult due to the formation of the brittle inter-metallic compound at the interface of the welded joint, by DC pulsed MIG arc brazing in a lap joint with the flux cored Al-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 μm. In this condition, the transverse tensile strength of the welded joint was about 80 MPa, 70 % of that of AI 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.

KW - Aluminum

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KW - Intermetallic compound

KW - Steel

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Dissimilar Metal Joining of Aluminum to Steel by MIG Arc Brazing Using Flux Cored Wire

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Keywords

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