Patent ID: 8992698
Filing Date: 2015-03-31
Classification: B23K,C22C,G21C

Abstract:
1. A welding metal, comprising iron and, by mass percent based on a total mass of the welding metal: from 0.02% to 0.10% of C; from 0.5% or less (excluding 0%) of Si; from 1.0% to 1.9% of Mn; from 2.7% to 8.0% of Ni; from 0.7% or less (excluding 0%) of Cr; from 0.05% to 0.8% of Mo; from 0.010% to 0.060% of Ti; from 0.010% or less (excluding 0%) of N; and from 0.015% to 0.060% of O, wherein: a total content of Cr and Mo is 0.8% or less (excluding 0%); an A value defined by formula (1) is 3.8% to 9.0%: an X value defined by formula (2) is 0.5 or greater: a surface area percentage of carbide particles having a circle-equivalent diameter of 0.20 μM or greater in the welding metal is 4.0% or less; and the number of carbide particles having a circle-equivalent diameter of 1.0 μm or greater is 1000 particles/mm