Preparation method of photo-thermal conversion coating for laser quenching

Abstract

The invention discloses a preparation method of a photo-thermal conversion coating for laser quenching. The preparation method comprises a formulation process and a preparation process. According to the invention, a component formula, in which silicon dioxide is used as a carrier dispensing agent, aluminum oxide and titanium nitride are used as blackening agents, cerium dioxide and praseodymium oxide are used as metallographic structure refining agents, shell-lac is used as an adhesive, and absolute ethyl alcohol is used as a quick-drying solvent, is adopted, technical schemes of conventionalequipment and a simple mixed process are utilized, the problems and defects of low photo-thermal conversion efficiency, low cost, uneven heating, small adhesion force and easiness in falloff existingin the prior art are overcome, and the photo-thermal conversion coating prepared by adopting the preparation method of the photo-thermal conversion costing for laser quenching is used for laser quenching to achieve the purposes of increasing the photo-thermal conversion efficiency, reducing the cost, heating uniformly and enhancing the adhesion force.

Description

technical field [0001] The invention relates to a method for preparing a coating, specifically referring to the preparation of a photothermal conversion coating for laser quenching that is coated on the surface of a metal material to be processed in a laser quenching process for converting laser radiation light energy into heat energy method. Background technique [0002] During the laser surface quenching treatment, in order to avoid the low absorption rate of the laser radiation light energy on the metal surface, before quenching, it is necessary to coat a layer of photothermal conversion coating on the treated metal surface to improve the photothermal conversion rate of the metal surface. Existing technologies, such as Patent No. 200810228064.1 "A new light-to-heat conversion coating for laser surface modification", due to the coarse particles, 1000-1500 mesh, resulting in large differences in coating thickness and uneven heating of the metal surface; aluminum oxide The ...

AI Technical Summary

Problems solved by technology

Existing technologies, such as Patent No. 200810228064.1 "A new light-to-heat conversion coating for laser surface modification", due to the coarse particles, 1000-1500 mesh, resulting in large differences in coating thickness and uneven heating of the metal surface; aluminum oxide The proportion of the high proportion leads to high heat insulation damping, low heat conduction, and low light-to-heat conversion rate; water-based solvents are easy to oxidize and corrode the metal surface, causing uneven heating of the metal surface; and the water is not volatile, and the drying time is long, making the preset coating The cost of working hours of the layer is high; the binder polyvinyl alcohol has low adhesion when heated, and the coating is easy to foam and fall off when heated, resulting in poor heating of the metal surface and low light-to-heat conversion rate; some materials in the component formula are expensive and difficult to obtain; Therefore, the prior art has the problems and deficiencies of low light-to-heat conversion rate, high cost, uneven heating, low adhesion and easy to fall off.