DISSIMILAR MATERIAL JOINING METHOD, DISSIMILAR MATERIAL JOINING JOINT, TUBULAR MEMBER WITH DISSIMILAR MATERIAL JOINING AUXILIARY MEMBER, AND METHOD OF MANUFACTURING THE SAME

摘要

To provide a dissimilar material joining method, a dissimilar material joining joint, and a tubular member with a dissimilar material joining auxiliary member, which can simply and certainly join different metallic material at a low cost, has a joining portion with excellent durability, and can be adopted to fields in a wide ranges; and a method of manufacturing the same.SOLUTION: In a dissimilar material joining method of joining a tubular first member made from a first metallic material, and a second member 2 made from a second metallic material different from the first metallic material, includes: a step for disposing an outside member of one of a tubular third member 3 and the first member 1, around an inside member of the other of the third member 3 made from a third metallic material different from the first metallic material and the first member 1; a step for caulking the first member 1 and the auxiliary member 3 by expanding the inside member to bulge a part of a peripheral wall of the inside member outward in a diametrical direction; and a step for joining the first member 1 and the second member 2 through the auxiliary member 3 by welding the auxiliary member 3 and the second member 2.SELECTED DRAWING: Figure 2