Preparation method of induction cladding coating for improving wear resistance of gray cast iron

Abstract

The invention provides a preparation method of an induction cladding coating for improving abrasion resistance of gray cast iron. The method includes: step 1, subjecting the surface of a gray cast iron substrate to sand blasting treatment, ultrasonically cleaning with anhydrous alcohol for 15min, and drying; step 2, adopting a silver brazing flux as a binding agent, and using distilled water for uniformly mixing alloy powder and the silver brazing flux according to a ratio of 10:1 to obtain mixed powder; step 3, according to a cold coating method, applying the mixed powder to the gray cast iron substrate surface treated in the step 1, and using a 3D printing plastic mould for shaping to form an iron-based preset coating in thickness of 2mm; step 4, coating the surface of the iron-based preset coating with clay to serve as a heat insulation medium; step 5, adopting an induction cladding method for coating preparation of the gray cast iron substrate. By adoption of the technical scheme,the problem of failure in preparation of the abrasion-resistant induction cladding coating on the surface of the gray cast iron in the prior art is solved.

Description

technical field [0001] The invention relates to the technical field of gray cast iron coating preparation, in particular to an induction cladding coating preparation method for improving the wear resistance of gray cast iron. Background technique [0002] Due to the high carbon content of gray cast iron, white structures that lead to cracking / peeling of the coating are likely to appear at the bonding interface between the cladding layer and the substrate; because graphite in gray cast iron exists in the form of flakes, its ends have sharp angles that can damage the substrate Due to the splitting effect, it is difficult to strengthen the performance through heat treatment; at the same time, the gray cast iron has a low melting point and is close to the cladding material, which makes it difficult to control the process parameters. Realize preparation of induction cladding coating with wear resistance on the surface of gray cast iron. Contents of the invention [0003] Accor...

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Problems solved by technology

[0003] According to the above-mentioned technical problem that it is difficult to realize the preparation of wear-resistant coating on the surface of gray cast iron in the existing technology, a preparation method of induction cladding coating for improving the wear resistance of gray cast iron is provided

The present invention mainly utilizes the iron-based coating formed by sandblasting and ultrasonic cleaning of the gray cast iron matrix and using silver brazing agent as a binder and alloy powder to carry out induction cladding, thereby realizing melting of the cladding material and solving the problem of gray cast iron It is difficult to strengthen the performance through heat treatment, which enhances its hardness, wear resistance and corrosion resistance.

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