| 摘要 |
PROBLEM TO BE SOLVED: To produce a composite member capable of reducing the production cost, high in the strength of the joint part and having original characteristics of the material, to provide a method for producing it and also provide a solenoid valve using it. SOLUTION: By providing a joint part 73 with a projecting part 721 and a recessed part 71, its joining strength can be improved. Moreover, by providing corner parts with curved surface parts 74, the concentration of stress acted on the corner parts can be prevented, so that the fatigue strength to tension or bending can be improved. Furthermore, since shrinkage occurs in a composite member 70 by executing baking, force acting in the direction of the arrow F is generated. Therefore, the recessed part 721 in a 2nd material part 72 is tightened from the projecting part 711 in a 1st material part 71 around it, by which the strength to tension or bending stress acting on the joint part 73 can be improved.
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