Alloy coating and its preparation method and alloying process of mold surface

Abstract

The invention discloses an alloy coating and a preparation method thereof and an alloying process of a mould surface. The alloy coating comprises the following raw materials in parts by mass: 20-30 parts of SiO2, 20-25 parts of Al2O3, 20-25 parts of Nb, 20-25 parts of Mo, 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 shell-lac and 300-400 parts of absolute ethanol. Defects, such as pores, inclusions and cracks, can be effectively avoided. The preparation method comprises the following steps of: separately crushing SiO2, Al2O3, Nb, Mo, Hf, Al, Si, Be and bentonite till the grain size is smaller than 3 microns; then uniformly mixing the components to obtain alloy powder; dissolving the shell-lac with a part of absolute ethanol to prepare an ethanol solution of the shell-lac; and finally, uniformly stirring the alloy powder, the ethanol solution of the shell-lac and the other part of absolute ethanol with a stirrer to obtain the alloy coating. The alloying process of the mould surface comprises the following steps of: putting a mould in an electron beam alloy coating for a while; and then performing electron beam bombardment on the mould surface in a protective gas atmosphere with pulsed electron beam equipment.

Description

technical field [0001] The invention belongs to the technical field of material surface treatment and strengthening, and in particular relates to an alloy coating, a preparation method thereof, and an alloying process of a mold surface. 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 trad...

AI Technical Summary

Problems solved by technology

[0005] Aiming at the above-mentioned deficiencies in the prior art, the present invention provides an alloy coating to solve the technical problems of defects such as pores, inclusions, and cracks in the existing alloy components, and correspondingly provides its preparation method. Alloying process on the surface of the mold to solve the problem of short service life of hot-working molds with surface treatment in the prior art