| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a product in which weld defects, such as oxide that occurs on the outer circumference or the inner surface of a friction-welded joint part, is eliminated, the reliability of which in joining is improved, the cost of which is low, and which consumes a small amount of energy. <P>SOLUTION: By performing friction welding while applying a liquid flux or spraying a vaporized flux to the joint surface, the molten metal on the joint surface is cleaned and the surface tension is reduced, and therefore, the effect to push out the oxide to the outside of the joint surface is brought about and diffusion joining is performed by the Kirkendall effect, and thereby, the joint strength is improved and it is made possible to reduce weight and cost. <P>COPYRIGHT: (C)2013,JPO&INPIT |
