| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a method for repairing a metal member, which can substantially equalize the hardness of a base metal to the hardness of a build-up welded part in a metal member that is repaired by build-up welding to suppress unevenness of the surface roughness of the metal member. <P>SOLUTION: The method for repairing a metal member applies build-up welding to a hole of a metal member in which the hole is generated, using a welding material having a hardness lower than that of the metal member as a base metal and formed of the same sort of material as the base metal. The build-up welded part rapidly cools down in solidification and causes refinement in the crystal grain thereof, thus, the hardness of the base metal and the hardness of the build-up welded part are substantially equalized by the hardening in the refinement of the crystal grain. <P>COPYRIGHT: (C)2013,JPO&INPIT |
