Laser alloy coating, preparation method and laser alloying method

Abstract

The invention discloses a laser alloy coating, a preparation method and a laser alloying method. The laser alloy coating comprises the following raw materials in parts by mass: 20-30 parts of SiO2, 20-25 parts of TiC, 20-25 parts of Ta, 20-25 parts of W, 20-25 parts of Hf, 20-25 parts of Al, 20-25 parts of Si, 20-25 parts of Be, 15-25 parts of bentonite, 6-10 parts of lac and 300-400 parts of absolute ethyl alcohol. Defects such as pores, inclusions and cracks are effectively avoided. The preparation method comprises the following steps: separately crushing SiO2, TiC, Ta, W, Hf, Al, Si, Be and bentonite till the granularity is smaller than 3 microns; then uniformly mixing the raw materials to obtain alloy power; dissolving the lac with a part of absolute ethyl alcohol into an ethanol solution of the lac; and finally, uniformly stirring the alloy powder, the ethanol solution of the lac and the other part of absolute ethyl alcohol. The laser alloying method comprises the steps: putting a mold in the laser alloy coating for a certain time; then taking out the mold; and then performing fusing treatment by a laser in introducing argon to finish laser alloying of the surface of the mold.

Description

technical field [0001] The invention belongs to the technical field of material surface treatment and strengthening, and in particular relates to a laser alloy coating, a preparation method and a laser alloying method. Background technique [0002] Hot work molds are subjected to variable stress and impact at high temperatures, and the molding temperature of the workpiece is often above 1000°C. It also has to withstand high temperature oxidation, burning, and thermal shock caused by thermal changes under strong water cooling conditions. When in service, it needs to bear the loads of high stress, thermal shock, thermal wear and corrosion, so the life of the mold is very low. In order to improve the life, the main method currently used is surface strengthening. Conventional methods include quenching, carburizing, nitriding, etc., but the effects of these methods are very limited, because the hot work mold works in a high temperature environment, and the traditional quenching ...

AI Technical Summary

Problems solved by technology

[0005] Aiming at the above-mentioned deficiencies in the prior art, the present invention provides a laser alloy coating to solve the technical problems of defects such as pores, inclusions, and cracks in the existing alloy components, and provides a corresponding preparation method thereof, and at the same time provides a method for using the laser alloy Laser alloying method for paint to solve the problem of short service life of hot work dies with surface treatment in the prior art