Powder core wire materials for preparing micro crystal and nanocrystalline coatings containing CrB by arc spraying

Abstract

The invention provides a CrB-containing microcrystal and nanocrystalline powder core wire for arc spraying. The powder core wire belongs to the field of hot spraying in material processing engineering, and is mainly used in the industrial fields for anticorrosion and wear resistance and so on. The microcrystal and the nanocrystalline crystalline state alloy is a crystalline state material with small grains formed by restructuring the internal structure of an amorphous state material at a high temperature, and is integration of high strength, hardness, toughness, wear resistance and corrosion resistance, but no patent report on the microcrystal and nanocrystalline powder core wire is seen at home and abroad. The invention is a CrB-containing microcrystal and nanocrystalline powder core wire and is characterized by comprising the following powder core components in percentage by mass: 50 to 70 percent of chromium boride, 10 to 25 percent of Mo, 10 to 15 percent of TiC and the balance being Fe powder. The coating prepared by the powder core wire can be decomposed to generate microcrystal and nanocrystalline during high-temperature spraying, and the coating is uniform in structure, high in hardness with HV0.1 more than1,100, and good in wear resistance, and the relative wear resistance can reach 15.8 times of that of Q235 steel.

Description

technical field [0001] The invention is a CrB-containing microcrystalline and nanocrystalline powder core wire material for arc spraying, which belongs to the field of thermal spraying in material processing engineering. It can be used in various industrial fields such as anti-corrosion and anti-wear. Background technique [0002] With the rapid growth of my country's economy, the demand for electricity will increase. In the power structure, my country's firepower equipment accounts for more than 3 / 4 of the total installed capacity, and the situation of excessive firepower will last for a long period of time. Therefore, accelerating the development of high-efficiency, low-pollution thermal power units and accelerating the development of clean coal combustion technology is the development direction of my country's thermal power technology. According to the analysis data of my country's power plant operation, boiler accidents are the most among the equipment accidents in pow...

AI Technical Summary

Problems solved by technology

[0009] The ultimate goal to be achieved by the present invention is to prepare an arc spray coating with a CrB-containing microcrystalline and nanocrystalline arc spray powder core wire material of the present invention, so that the coating has high-temperature oxidation resistance and high-temperature corrosion-abrasion resistance Good, solve the problem of high temperature oxidation corrosion and erosion wear on the tube wall of the converter hood, and ensure the safe operation of the converter in the steelmaking plant

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