Novel photothermal conversion paint for laser quenching and preparation method thereof

Abstract

The invention belongs to the field of paint for a laser process, and particularly relates to novel photothermal conversion paint for laser quenching and a preparation method thereof. The novel photothermal conversion paint is prepared from the following raw materials in parts by weight: 15 to 20 parts of silicon carbide, 10 to 15 parts of micron aluminum powder, 10 to 15 parts of carbon nano tubes, 3 to 5 parts of graphite, 5 to 10 parts of chromic oxide, 5 to 10 parts of photosensitive polyurethane, 5 to 10 parts of waterborne acrylate emulsion and 30 to 40 parts of absolute ethyl alcohol. The novel photothermal conversion paint effectively solves some common problems that in the laser quenching process of the existing coating, the light absorbance rate is low; the heat conduction is poor; the coating adhesive force is low; the coating drying is slow; solutions can easily corrode the metal surface; the coating particles are large, so that the quenching thickness and hardness are not uniform; the quenching effect is not ideal, and the like. Particularly, the laser paint has high photosensitivity; the light absorbance of the metal surface can be obviously improved.

Description

technical field [0001] The invention belongs to the field of coatings for laser technology, and in particular relates to a novel photothermal conversion coating for laser quenching and a preparation method thereof. Background technique [0002] Laser quenching is a quenching technology that uses laser to heat the surface of the material above the phase transition point. As the material itself cools, austenite transforms into martensite, thereby hardening the surface of the material; laser quenching has been successfully applied to the metallurgical industry, The surface strengthening of wearing parts in the machinery industry and petrochemical industry, especially in improving the service life of wearing parts such as rolls, guides, gears, and cutting edges, has a remarkable effect and has achieved great economic and social benefits. In recent years, it has also been more and more widely used in the surface strengthening of parts such as molds and gears. [0003] Laser melt...

AI Technical Summary

Problems solved by technology

The disadvantage of this technology is that the roughness of the workpiece surface is damaged to a certain extent, and generally requires subsequent machining to restore

However, the existing laser coatings are more or less high in price and cost; low in light-to-heat conversion; rough in texture and large in particle size, and are prone to melting or micro-melting of the metal surface due to unstable laser energy; Low adhesion; Unfavorable factors such as pollution during quenching, uneven quenching, burning or back spraying, irritating odor, troublesome configuration, cumbersome operation, and difficulty in obtaining materials