High-chromium type high temperature oxidation-resistant arc spraying powder core threaded material

Abstract

The invention relates to a high-chromium anti-high temperature oxidation electric arc spraying powder core wire, which belongs to anti-high temperature oxidation electric arc spraying powder core wire used on the surface of a metal material. The invention belongs to the field of hot spraying for processing materials and is mainly used for protecting and repairing the flue of the converter and the coal powder boiler of the boiler of an electric plant. The anti-high temperature oxidation electric arc spraying powder core wire is characterized in that the weight percentages of the components of the powder core are as follows: 70 to 90 percent of metal chromium; 4 to 9 percent of ferroboron; 0 to 5 percent of metal aluminum, and the rest is metal nickel. The preparation method adopts the prior art that a 430 stainless steel belt is firstly rolled into a U shape; then the powder of the powder core accounted for 39 percent of the weight of a spraying wire is added into a U-shaped slot; the opening of the U-shaped slot is closed so as to coat the powder core t inside the opening; a drawing die is used for gradually pulling and lightening; a diameter reaches 3.0mm. An electric arc spraying prepared by the product has the advantages of high anti-high temperature oxidation performance and high rigidity, thus being capable of meeting the working situation requirements for the gas hood of the converter to run.

Description

technical field [0001] The invention relates to a high-temperature oxidation-resistant arc-sprayed powder core wire material on the surface of a metal material, which belongs to the field of thermal spraying in material processing engineering. The invention is mainly applied to the protection and repair of the water-cooled wall of the converter fume hood in a steelmaking plant. Background technique [0002] The main function of waste heat boiler hoods in steelworks is to cool down the high-temperature flue gas for easy recovery; at the same time, the heat exchange between high-temperature flue gas and boiler cooling water is used to generate steam for use in steel mills and living areas. Because the converter hood is directly above the converter mouth, the working conditions are harsh, and the flue gas temperature is as high as 1100-1400 °C, and contains CO, CO 2 , S and other harmful gases and a large amount of dust mainly composed of metal oxides can easily cause high-temp...

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Problems solved by technology

[0004] The problem to be solved by the present invention is: the arc spraying coating prepared by the present invention has good high-temperature oxidation resistance and high-temperature corrosion-abrasion resistance, solves the problems of high-temperature oxidation corrosion and erosion wear on the pipe wall of the converter smoke hood, and ensures that the converter in the steelmaking plant safe operation of

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