Powder core wire material for high chrome molybdenum alloy arc spraying

Abstract

The invention relates to a high-hardness high-sulfur-corrosion-resistant electric arc spraying powder core wire which belongs to electric arc spraying powder cored wires which resist high-temperature oxidation and corrosion and used for the surface protection of metal materials. The high-hardness high-sulfur-corrosion-resistant electric arc spraying powder core wire belongs to the field of hot spraying in material processing engineering and is mainly used for the high-temperature corrosion, erosion and abrasion resistance of four tubes of a general coal-powder boiler of a coal-fired power station boiler, the corrosion prevention and the abrasion resistance of a converter smoke hood and a flue in a steel works and the repair of various axles, crankshafts, plunger pistons, paper-making drying cylinders, and the like. The high-hardness high-sulfur-corrosion-resistant electric arc spraying powder core wire is characterized by comprising the powder core components according to percentages by weight of 22-29 percent of crome metal, 5-9 percent of metallic molybdenum, 2.5-10 percent of metallic nickel, 4.0-6.5 percent of metallic aluminum, 0.5-1 percent of carbon, 1.0-3.0 percent of rare-earth, and metallic iron. A preparation method of the high-hardness high-sulfur-corrosion-resistant electric arc spraying powder core wire adopts the prior processes of firstly rolling a low-carbon cold-rolled strip into a U shape, adding powder core powders which account for 30-40 percent of the gross weight of spraying wires into the U-shaped groove, closing the U-shaped groove and wrapping the powder cores in the U-shaped groove, drawing gradually and lightening through a wire-drawing die to lead the diameter to reach 3.0mm.

Description

technical field [0001] A high-hardness and high-sulfur corrosion-resistant electric arc spraying powder core wire material belongs to the thermal spraying field in material processing engineering. Anti-corrosion and wear-resistant of converter hood and flue in steel mills, repair of various shafts, crankshafts, plungers, paper drying cylinders, etc. Background technique [0002] With the development of modern industry, the performance requirements for the surface of mechanical product parts are getting higher and higher, and it is required to be able to work reliably and continuously under the conditions of high speed, high temperature, high pressure, heavy load and corrosive media, which puts forward new requirements for manufacturing technology. challenge. This challenge not only promotes the development of the surface engineering discipline, but also calls for the extensive application of advanced surface engineering (such as: composite surface engineering, nano-surface ...

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Problems solved by technology

[0006] The problem to be solved by the present invention is: the high temperature oxidation resistance and high temperature corrosion resistance-abrasion resistance of the arc spray coating prepared by the present invention are significantly improved compared with the pipe wall surface not sprayed with this product, so as to solve the problem of converter smoke in steel mills. High temperature oxidation corrosion and erosion wear problems in the hood and flue to ensure the safe operation of the converter in the steelmaking plant

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