Electric arc spraying method

Abstract

The invention relates to an electric arc spraying method. The electric arc spraying method comprises the following steps that S1, construction preparation is conducted; S2, pretreatment is conducted on the surface to be sprayed, specifically, sand blasting treatment is conducted on the surface of a workpiece through pneumatically-controlled sand blasting equipment, and the roughness of the workpiece reaches 90-120 microns; S3, pretreatment is conducted on a metal wire, specifically, the metal wire is cleaned through a rust remover, straightened through a straightening machine after being cleaned and dried, and polished after being straightened, so that the surface of the metal wire is smooth; S4, electric arc spraying is conducted; S5, coating hole sealing is conducted; and S6, coating inspection is conducted, specifically, the appearance surface obtained after spraying is inspected. According to the electric arc spraying method, the metal wire is cleaned, dried, straightened and polished before spraying, so that the outer surface of the workpiece obtained after spraying is smooth, a coating is uniform, flat and compact, the coating and a base body are well combined, bubbling, cracking, pitted surfaces and peeling are avoided, and accordingly the corrosion resistance and structural strength of the workpiece are improved.

Description

technical field [0001] The invention relates to the technical field of arc spraying, in particular to an arc spraying method. Background technique [0002] Arc spraying is a technology that uses an electric arc that burns between two continuously fed metal wires to melt metal, atomizes the molten metal with high-speed airflow, and accelerates the atomized metal particles so that they are sprayed to the workpiece to form a coating. . [0003] In the existing technology, it is necessary to select a suitable metal wire as a raw material before spraying. However, due to long-term exposure of the metal wire to the air, not only will an oxide layer be formed on its surface, but also the metal wire is easily stained with oil and dust. After spraying with this metal wire, the arc sprayed coating on the surface of the workpiece will appear uneven, blistering, peeling and pockmarked, which reduces the effect of arc spraying and is not conducive to large-area anti-corrosion and wear o...

AI Technical Summary

Problems solved by technology

[0003] In the existing technology, it is necessary to select a suitable metal wire as the raw material before spraying. However, due to the long-term exposure of the metal wire to the air, not only will an oxide layer be formed on its surface, but also the metal wire is easily stained with oil and dust.

After spraying with this metal wire, the arc sprayed coating on the surface of the workpiece will appear uneven, blistering, peeling and pockmarked, which reduces the effect of arc spraying and is not conducive to large-area anti-corrosion and wear or processing errors. surface repair

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