Patent ID: 8308051
Filing Date: 2012-11-13
Classification: B23K,Y10T

Abstract:
1. A method of welding dissimilar metal materials, comprising: preparing a rotatable tool; positioning a high melting-point material and a low melting-point material which are dissimilar metal materials having melting points different from each other to a planned welding position; pressing the rotatable tool to the high melting-point material and then inserting the rotatable tool thereinto while rotating the rotatable tool; and performing a friction-stir-welding between the high melting-point material and the low melting-point material to each other, wherein 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, and wherein the high melting-point material and the intervening piece are an iron material, and the low melting-point material is either one of an aluminum material or a magnesium material.