High-temperature resistant coating and preparation method thereof

Abstract

The invention relates to a high-temperature resistant coating which comprises the following components according to weight percentage: 45-70 of quartz powder, 20-45 of water glass, 4-6 of water-soluble resin and 4-8 of water. A preparation method of the high-temperature resistant coating comprises the steps: directly putting all the components together and evenly stirring the same to prepare the product. The high-temperature resistant coating has simple production process, low production cost and strong maneuverability. After the high-temperature resistant coating is coated on surfaces of a steel billet and a metal part, the surfaces of the steel billet and the metal part and heating burner gas can be effectively isolated and protected, thereby the fire consumption of metal in the heating process is reduced, and the metal yield rate is improved.

Description

technical field [0001] The invention relates to a coating, in particular to a high-temperature resistant coating and a preparation method thereof. Background technique [0002] Hot rolling is to heat the billet, and then the billet is rolled by the continuous rolling mill to produce a finished product with a size that meets the specifications. Heat treatment is to heat the metal material or parts to the set process temperature and then use different cooling methods to cool the material to achieve the desired mechanical properties and structure. [0003] In actual production, hot rolling and heat treatment also have the following problems: [0004] (1) For special structural steel, in order to meet some specific use requirements of steel, a relatively high content of carbon, phosphorus, sulfur, copper and other elements (single or multiple elements are added to the steel) is deliberately added to the steel. These relatively high-content elements exist in the steel alone or ...

AI Technical Summary

Problems solved by technology

For surface peeled blanks, the surface grains are coarse, which is more likely to cause local overheating or overburning

In addition, if the billet is not peeled cleanly and the defects of the billet are exposed, the defects that could be rolled and welded can not be welded after being heated and oxidized, resulting in rolling waste, resulting in rolling cracks and failure of normal production

[0005] (2) For high-alloy steels and high-temperature alloys, some iron-based and nickel-based metal materials are difficult to deform, and the deformation temperature range is narrow, and the thermal processing process is difficult

[0006] (3) For products with decarburization depth requirements on the surface of high-carbon alloy steel and parts, the depth of decarburization layer can be guaranteed by controlling the heating furnace gas, which cannot meet the requirements of technical standards

However, the flame cleaning metal loss is large (blank metal loss reaches 2%), and the investment cost of equipment is high

[0010] Another method is to coat a layer of high-temperature-resistant coating on the surface of the metal material, but the heat-resistant temperature of the existing high-temperature-resistant coating is ≤ 1050 ° C, which cannot meet the high temperature requirement of billet heating greater than 1050 ° C

In addition, due to the high price, it is not suitable for the surface protection of heat treatment of metal parts with low added value.