Ni BASE COATED ARC WELDING ROD FOR 9 Ni STEEL WELDING

摘要

PROBLEM TO BE SOLVED: To provide a Ni base alloy coated arc welding rod for 9% Ni steel welding, with which the excellent welding workability in high inlet heat, the excellent crack resistance of the welded metal, and the good mechanical property in the welding of a thin sheet are obtd. ;SOLUTION: In an Ni base coated arc welding rod, 55-75 wt.% Ni is contained in a core wire, and further, Cu is added to one side or both of the core wire and the coated agent, the amount of which is 0.1-1.0 wt.% in the core wire and 0.011-1.1 pts.wt. in the coated agent to 100 pts.wt. of the core wire so that Cu content in the coated agent to the Cu content in the core wire +100 pts.wt. of core wire becomes 0.1-1.1. Further, as the coated agent, slag agent containing metal powder or alloy powder composed of one or more kinds from among Al, Si, Ti, metallic carbonates, metallic fluorides, silicate compounds and pottasium compounds is coated on the core wire.;COPYRIGHT: (C)2000,JPO