High-temperature anti-oxidation coating for heat treatment of carbon steel and preparation method of high-temperature anti-oxidation coating

Abstract

The invention relates to a high-temperature anti-oxidation coating for heat treatment of carbon steel and a preparation method of the high-temperature anti-oxidation coating, and belongs to the fieldof surface treatment of metal materials. The coating has a mass ratio of borax, magnesia, quartz glass powder, titanium oxide and dolomite at (5-5.2): (10-10.5):(2-2.5):(3-3.5):(1-1.2), and the preparation method comprises the steps: (1) mixing the raw material powder, and preparing a binder; (2) pouring the binder into the mixed powder, performing stirring, and coating the mixed paste on the surface of a substrate; and (3) performing sufficient drying and coagulating on the paste so as to form the high-temperature anti-oxidation coating. The high-temperature anti-oxidation coating has a simple process and low cost, and a dense anti-oxidation coating can be formed on the steel, so that contact of the steel with a heating atmosphere is prevented, and oxidative decarburization of a workpieceis prevented well during high-temperature heating treatment; and the coating peels off after heat treatment is conducted, so that direct use or subsequent machining of the workpiece is not affected.

Description

technical field [0001] The invention belongs to the field of surface treatment of metal materials, and in particular relates to a high-temperature anti-oxidation coating for heat treatment of carbon steel and a preparation method thereof. Background technique [0002] Carbon steel is an important class of steel materials. It is not only widely used in national defense construction, but also plays an important role in economic life. Carbon steel plays an important role in the national economy by virtue of its strong advantages and huge usage. [0003] Carbon steel must be heated to a high temperature to complete processes such as quenching, annealing, normalizing, rolling and die forging. But in the process of high temperature heating, its oxidation burning loss is more serious. Oxidative decarburization destroys the surface quality of the material, and at the same time damages the structure of the material and greatly reduces its performance. In order to prevent oxidative...

AI Technical Summary

Problems solved by technology

In order to prevent oxidative decarburization, the existing technology has to adopt vacuum heat treatment or atmosphere protection heat treatment in industrial production. These two heat treatment methods require special heat treatment equipment, and the equipment is expensive and technically difficult, which makes the cost of heat treatment significantly increased.

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