METHOD FOR JOINING DISSIMILAR MATERIAL AND JOINT STRUCTURE OF DISSIMILAR MATERIAL

PURPOSE:To provide a highly reliable joint structure of dissimilar materials having a high joining strength and heat resistance. CONSTITUTION:The joining method of dissimilar material includes the process where a flat part 4 of a round wire rod 1 to which the flat part is preliminarily formed is overlapped on the flat surface to be joined of the another kind of member 2 formed by the material dissimilar from that of the round wire rod 1 through a joining improving member 3, and the process where the alloyed layer 8 is formed by reacting the joining improving member 3, a part of the round wire rod 1 and a part of the other kind of the member 2 with each other through energizing and heating since the joined layer made of the alloy layer 8 whose melting point is higher than that of the joining improving member 3 is obtained on the interface of the part where the wire rod is obtained, the joining strength and the heat resistance are excellent, the electrical resistance is also small, leading to stable use as the electrically conductive material for a long time.