Nickel base welding rod of Ni-Cr-Mo alloy system

Abstract

The invention introduces a nickel base welding rod of a Ni-Cr-Mo alloy system. The nickel base welding rod comprises a core wire and a coating and is characterized in that the core wire is an ERNiCrMo-3 core wire; and the coating comprises 20-40% of marble, 25-35% of fluorite, 2-5% of bentonite, 1-4% of ferrosilicon, 1-4% of manganese metal, 0-2% of sodium carbonate, 1-3% of quartz, 1-3% of strontium carbonate, 2-5% of barium fluoride, 5-10% of barium carbonate, 2-6% of potassium titanate, 2-5% of ferrotitanium, 3-6% of niobium powder and 1-4% of chromium metal. The nickel base welding rod produced by the invention is relatively high in strength, has deposited metal tensile strength which is up to more than 760MPa, is better in low-temperature impact toughness, has an impact powder average value of more than 40J at minus 196 DEG C, and is favorable in welding technological efficiency, stable in arcing during welding, easy in operation, good in formation of welding seams, convenient in deslagging, simple in production process and lower in cost.

Description

technical field [0001] The invention relates to a welding material, in particular to a nickel-based welding rod of nickel-chromium-molybdenum alloy system. Background technique [0002] In recent years, nickel-based alloys have been used more and more widely. Nickel-based alloys refer to alloys based on nickel (Ni≥50%), containing other alloying elements, and resistant to corrosion in some media. There are mainly nickel, nickel-molybdenum (nickel-molybdenum-iron) alloy, nickel-chromium (nickel-iron) alloy, nickel-chromium-molybdenum and nickel-iron-chromium and so on. Nickel-based alloys are mainly used in extreme environments with harsh service conditions and high safety requirements that are difficult for general steel. With the continuous and rapid development of my country's economy, the equipment manufacturing industry has become a pillar industry of the national economy. The prominent features of the development of the equipment manufacturing industry are: the parame...

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Problems solved by technology

[0003]There are only two domestic patents on nickel-based electrodes: ZL 2009 1 0227721.5 (a nickel-based electrode, nickel-chromium-iron alloy system) and ZL 2009 1 0227586.4 (a Nickel-based welding rods for AC welding, nickel-molybdenum alloy system) are all applied by the No. 725 Research Institute of China Shipbuilding Industry Corporation, and a patent for nickel-based flux-cored welding wire has been retrieved from foreign patents for nickel-based welding materials: Flux cored arc welding method of inconel 625 (KR20050024107 20050323), no relevant patents for nickel-based electrodes were found

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