Method of welding dissimilar metal materials and welded body of dissimilar metal materials

摘要

A method of welding dissimilar metal materials, wherein a high melting-point material and a low melting-point material which are dissimilar metal materials having melting points different from each other are positioned to a planned welding position, and a rotatable tool is pressed to and then inserted into the high melting-point material to thereby perform a friction-stir-welding between the high melting-point material and the low melting-point material to each other. The friction-stir-welding between the high melting-point material and the low melting-point material is performed by disposing an intervening piece made from a same material as the high melting-point material between the rotatable tool and the high melting-point material.