Method of overlaying by laser beam and overlaying structure

摘要

A method of overlaying by a laser beam, comprises the steps of: relatively moving and irradiating a laser beam with respect to a base metal and simultaneously putting an other metal material than the base metal material on the base metal surface; and forming an overlay layer by melting the other metal material, wherein the overlay operation is performed in such a manner that an inclined angle theta with respect to the base metal surface of the beginning end portion surface becomes a range of 8 DEG < theta <27 DEG .