| 摘要 |
PROBLEM TO BE SOLVED: To provide a method that enables partial joining of one member to the other by a simple means, that attains thickness for both members and that also excels in the joining strength (adhesion). SOLUTION: In joining two metal materials 1, 2 each with a different hardness, a large number of blind bite holes 3 are preliminarily formed on the joining surface of the hard metal material 2. The bite holes 3 are set to have the cross section larger than the opening part 3a at least in a part in the depth direction. With the joining surfaces superposed of both members 1, 2, the soft metal material 1 is deformed and bitten into the bite holes 3 fillingly by being pressed in the joining direction by forging. The bite holes 3 are desirably formed by the irradiation of an electron beam. |
