Kobe Steel, Ltd.

Hidekazu Ido

Katsushi Matsumoto

Mikako Takeda

Jun Katoh

Wataru Urushihara

Tsuyoshi Matsumoto

Seiji Sasabe

Yasuaki Sugizaki

There are provided a flux cored wire for joining dissimilar materials with each other, capable of enhancing a bonding strength upon joining an aluminum-base material with a steel-base material, and excellent in bonding efficiency, a method for joining the dissimilar materials with each other, and a bonded joint obtained by the method. In particular, there is provided a method for joining dissimilar materials with each other, in the case of melt weld-bonding of high-strength dissimilar materials with each other, that is, the high-strength steel member with the high-strength 6000 series aluminum alloy member and in the case of the steel member being a galvanized steel member. In one mode, use is made of a flux cored wire wherein the interior of an aluminum alloy envelope is filled up with a flux, the flux has fluoride composition containing a given amount of AlFwithout containing chloride, and the aluminum alloy of the envelope contains Si in a range of 1 to 13 mass %. If such a flux cored wire is use, it is possible to obtain a high bonding strength in the case of melt weld-bonding of high-strength dissimilar materials with each other, that is, the high-strength steel member with the high-strength 6000 series aluminum alloy member.

Flux-cored wire for different-material bonding and method of bonding different materials

To provide a steel-aluminum welded material and a spot welding method therefor having high weld strength. The steel-aluminum welded materialincludes a steel materialand an aluminum materialhaving predetermined widths. The area of a nuggetof a spot-welded part is determined as a function of the thickness of the aluminum material, and the area of a part of the nuggetcorresponding to a part having a thickness in a range between 0.5 and 10 &#x3bc;m of an interface reaction layeris defined as a function of the thickness of the aluminum material

Joined body of dissimilar materials comprising steel material and aluminum material, and joining method therefor

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Kobe, Japan

Hidekazu Ido