Powder core wire for electric arc spraying and preparing method of powder core wire

Abstract

The invention belongs to the technical field of alloy material preparing, and particularly relates to a powder core wire for electric arc spraying and a preparing method of the powder core wire. B powder and Zn powder serve as raw materials for preparing Zn-B alloy powder, Mg powder, Al powder and B powder serve as raw materials, Mg-Al alloy powder is prepared, and after the Al powder, the Zn powder, the Zn-B alloy powder and the B2O3 powder are heated and melted, a Zn-Al alloy belt is prepared through continuous casting, hot rolling, coiling and other procedures and is bent and dried, and then a dry U-shaped groove is prepared through drying; and then, the Zn powder, the Al powder, the Mg-Al alloy powder and the rare earth powder are mixed and dried to be added into the dry U-shaped groove, after the dry U-shaped groove is sealed, the wire is prepared through level-by-level drawing, and then the powder core wire for electric arc spraying is obtained. The obtained wire is high in hardness and good in mechanical performance, reliable wire feeding can be achieved during spraying, long-time stable spraying can be guaranteed, and the coating obtained after spraying has good mechanicalperformance, excellent corrosion resisting performance and high density.

Description

technical field [0001] The invention belongs to the technical field of alloy material preparation, and in particular relates to a powder core wire material for arc spraying and a preparation method thereof. Background technique [0002] Arc spraying technology is the most suitable for large-scale promotion of thermal spraying technology. Its principle is to use electric arc to heat the sprayed wire to a molten or semi-melted state, and then spray and deposit it on the surface of the pretreated substrate at a certain speed to form a coating. Floor. At present, there are two kinds of wire materials used in arc spraying: metal solid wire and powder-filled powder core wire. However, the principle of arc spraying determines that it can only be sprayed with conductive wire, so many high hardness, high Solid wires with wear resistance, poor ductility, and non-conductivity are difficult to apply to arc spraying. Therefore, arc spraying wires are usually powder core wires. [0003]...

AI Technical Summary

Problems solved by technology

[0005] The technical problem mainly solved by the present invention: for the traditional Zn-Al base alloy spraying powder core wire, the pure Zn strip is usually used as the outer skin, and the Al powder and other mixed powders are used as the filler, and the hardness and rigidity of the Zn strip are extremely low. , the wire material made is soft and easy to deform, thus affecting the reliable wire feeding during spraying, resulting in the problem that the spraying cannot be stabilized for a long time, and a powder core wire material for arc spraying and its preparation method are provided