Novel amorphous state hard surface alloy drug core wire material

Abstract

The invention provides a novel amorphous state hard surface alloy drug core wire material for electric arc spraying. The drug core powder in the drug core wire material is formed by mixing amorphous state powder, rareearthsi, manganese metal, chromium carbide, high-carbon ferrochromium, ferromolybdenum, tungsten carbide, ferrovanadium, chromium nitride, ferrotitanium and polyiron, and drawing the mixture with an H08A metal strip into hard surface alloy drug core wire materials of different diameters. According to the novel amorphous state hard surface alloy drug core wire material, mineral powder is replaced by the amorphous state powder, so that the moisture absorption-preventing performance and the processing property of the spraying drug core wire material are improved; the wear resistance and the corrosion resistance of a spraying coating are improved; the bonding strength between the coating and a basal body is improved. The novel amorphous state hard surface alloy drug core wire material can be used for not only electric arc spraying, but also open arc welding, is mainly used for pre-maintanence of a water wall pipe, a superheater pipe, a reheater pipe, a coal economizer pipe, ferrous metallurgy equipment, a high-temperature resistant and corrosion-resistant steal structure and the like of a power station boiler, and aims to prolong the service life of steal mechanical equipment under a severe working condition.

Description

[0001] technical field [0002] The invention relates to a new type of amorphous hard surface alloy spraying drug core wire material, which belongs to the technical field of application of amorphous materials. Background technique [0003] The water-cooled wall tubes, superheater tubes, reheater tubes, and economizer tubes (referred to as the "four tubes" of boilers) of power plant boilers have been operating under high-temperature corrosion and wear conditions for a long time. During the operation of the boiler, the high-temperature corrosive gas containing S generated by the combustion will accelerate the oxidation and corrosion of the tube wall; the dust and ash particles formed by the combustion will wash the surface of the furnace tube under the action of the air flow, causing wear and tear, reducing the "four tubes" of the boiler. lifespan. In order to improve the service life of the "four tubes" of the boiler, arc spraying is often used to spray a layer of high w...

AI Technical Summary

Problems solved by technology

This type of arc sprayed hardfacing alloy core wire material has the following obvious deficiencies: ① Poor moisture resistance, TiO2, SiO2 have certain moisture absorption , easy to cause corrosion of the sprayed core wire; ② needle-shaped holes are prone to appear in the sprayed coating, and the process performance is poor. It will cause splashing and affect the performance of the spraying process; ③The bonding strength between the sprayed coating and the substrate is low, and the corrosion resistance is average

Due to the accumulation of H atoms to form needle-like pores caused by H2, the bonding strength between the sprayed coating and the substrate is low, and the corrosion resistance of the coating is low

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