| 摘要 |
<p>PROBLEM TO BE SOLVED: To prevent recesses on the surface caused by the application of excessive electromagnetic stirring force on the molten zone at the time of remelting a primary coating layer formed on the surface of a base metal by thermal spraying or the like by induction heating. SOLUTION: At the time of subjecting a primary coating layer 11 on the surface of a base metal 10 to induction heating by an inductor 12, the penetrating depthδof induced current is regulated to >=1.5 times the thickness (d) of the primary coating layer 11, by which the degree in which the induced current density reduces as it is deepen from the surface is made gentle, thus, the induced current density I0 in the surface of the primary coating layer is made low, and electromagnetic stirring force operating on the molten metal is made small to block the excessive flow of the molten metal, so that the generation of defects such as recesses on the surface can be prevented.</p> |
