Anti-carburizing paint and preparation method thereof

Abstract

The invention discloses an anti-carburizing paint, which is prepared from the following ingredients (by weight): 20% of boric acid, 15% of Li-bentonite, 25% of kaolin, 12% of aluminium dihydrogen phosphate, 3% of Basic Zinc Yellow and 25% of water. The invention also discloses a preparation method of the above anti-carburizing paint. The anti-carburizing paint can be removed through washing after carburizing heat treatment. Thus, the problem that a traditional anti-carburizing paint is hard to peel away after carburizing heat treatment is solved. In the formula of the anti-carburizing paint of the invention, an inorganic high-temperature-resistant material is used as an anticarburizer. After the anticarburizer is brushed on the surface of a workpiece, an anti-carburizing coating has good caking property, will not be peeled or flow at high temperature, and will not influence the carburizing atmosphere.

Description

technical field [0001] The invention relates to an anti-carburization coating. The invention also relates to a preparation method of the above-mentioned anti-carburization coating. Background technique [0002] Gears and other mechanical parts generally need to be carburized on the working surface or force-bearing surface after machining, and then quenched or other heat treatment to improve their mechanical properties, chemical properties and processing properties. In order to prevent the surface of the secondary processing in the subsequent process from producing brittleness and hardness and damage the processing tool, it is necessary to perform anti-carburization treatment on the surface of the workpiece during carburizing. The anti-carburization methods of steel parts mainly include mechanical processing method, copper plating method and anti-carburization coating method. The machining method is to increase the machining allowance of the workpiece, and remove the carburi...

AI Technical Summary

Problems solved by technology

Generally, anti-seepage coatings mainly use silicate and glass powder as film-forming substances. This type of coating is difficult to peel off after carburizing and heat treatment, and needs to be removed by shot blasting or sandblasting, which increases production costs and prolongs the production cycle.

In addition, for workpieces with complex structures, the anti-carburization coating painted on the inside of the workpiece is extremely difficult to remove by shot blasting or sandblasting