Nickel-based welding rod for welding nickel, chrome and iron alloy steel

Abstract

The invention belongs to a nickel-based welding rod for welding nickel, chrome and iron alloy steel. The welding rod comprises, by weight, 2.5<=Mn<=4.0, 15.0<=Cr<=18.0, 2.0<=Fe<=5.0, 0.4<=Ti<=1.0, 1.5<=Nb<=2.5, Co<=0.05, Cu<=0.30, C<=0.04, S<=0.010, P<=0.025, Si<=0.20, and the balance welding cores of Ni; ingredients of coating comprise, by weight, 22% to 37% of rutile powder, 15% to 30% of cryolite powder, 20% to 35% of marble powder, 2% to 5% of ilmenite powder, 3% to 8% of barium carbonate, 0.5% to 1% of sodium alginate, 0.2% to 0.6% of sodium carbonate, 4% to 8% of electrolytic manganese, 7% to 10% of ferroniobium powder and binders. The nickel-based welding rod for welding nickel, chrome and iron alloy steel has the advantages that the welding technology is good, welded joints are bright, the molding is attractive, and the weld bead height and the welded joint infiltration angle are appropriate;comprehensive mechanical properties of deposited metals are particularly outstanding at the room temperature and at the ultralow temperature and the high temperature particularly; and welded bodies can be used safely and reliably in an operating temperature ranging from minus 196 DEG C ultralow temperature to 980 DEG C, and the like.

Description

technical field [0001] The invention relates to an electric welding electrode for welding, especially a nickel-chromium-iron alloy (UNS N06600, UNSN06601) which meets the requirements of ENi6062 in GB / T13814-2008 and is specially used for welding heat resistance, high temperature corrosion resistance, and high temperature durability. ) welding rod, the welding body processed by this welding rod can be used safely and reliably in the working temperature range from -196°C to 980°C; especially suitable for Inconel600 used in aerospace, petrochemical, food processing equipment, heat treatment equipment and other fields Butt joints and their welding to dissimilar materials like stainless steel. Background technique [0002] Nickel-based alloys refer to a class of alloys that have comprehensive properties such as high strength and certain oxidation and corrosion resistance at high temperatures of 650-1000 °C. Nickel-based alloys are based on nickel and contain other alloying elem...

AI Technical Summary

Problems solved by technology

[0006] The solution of the present invention is that the melting point of nickel-based alloys is higher than that of iron-based alloys, and the welding rods trial-produced with ordinary acidic or alkaline slag-based coating formulas often have poor arc stability, large slag viscosity, and molten pool Poor fluidity, uneven coverage of slag shells; hard slag shells, difficult slag removal, and unclean residue cleaning; uneven weld formation, poor surface brightness, etc.