| 摘要 |
PROBLEM TO BE SOLVED: To provide a build-up welding method for forming a build-up welded portion having excellent wear resistance, corrosion resistance and thermal shock resistance on the surface of a base material, and to provide the build-up welded portion formed by the method. SOLUTION: The build-up welding method for forming a build-up welded portion having excellent wear resistance, corrosion resistance and thermal shock resistance includes build-up welding a nickel-base alloy or a stainless steel alloy on the surface of a base material 11 having not less than 1.5 mm thickness by using a welding machine 27 for performing MIG welding or MAG welding under such a condition that an amplitude of weaving is≥7 mm and≤20 mm, a frequency of weaving is≤7 times/second, a welding speed is≥2 mm/second and≤17 mm/second and a dilution rate from the base material 11 of the build-up welded portion is≤10 mass%. It is preferable that a welding heat input by the welding machine is≥400 Joule/mm and≤1,100 Joule/mm. COPYRIGHT: (C)2008,JPO&INPIT |
