FLUX CORED WIRE FOR WELDING CR-MO LOW-ALLOY HEAT RESISTANT STEEL

摘要

PURPOSE: To provide a flux cored wire for welding Cr-Mo low-alloy heat resistant steel where the excellent workability is secured for the all position welding, and the weld metal having the high strength and high toughness at the same time is obtained. ;CONSTITUTION: The flux cored wire for the welding where the Ar-CO₂ mixed gas or the Ar-O₂ mixed gas is used as the shielding gases for welding, and the flux containing ≥90% metallic powder is filled in a steel outer shell has the composition consisting of, by weight to the total weight of the wire, 0.04-0.15% C, 0.30-1.00% Si, 0.65-1.80% Mn, 2.00-3.60% Cr, and 0.90-1.20% Mo as the essential components. Use of the flux cored wire for welding Cr-Mo low-alloy heat resistant steel having the composition consisting of two or more kinds of 0.10-0.75% V, 0.02-0.10% Nb and ≤0.006% B, and the balance Fe with inevitable impurities sufficiently satisfies the mechanical property of the weld metal.;COPYRIGHT: (C)1996,JPO