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Anti-oxidation coating applied to high-temperature steel and preparation method thereof

A technology for anti-oxidation coatings and steel, applied in alkali metal silicate coatings, coatings, etc., can solve the problems of low anti-oxidation temperature, expensive coatings, and inapplicability

Inactive Publication Date: 2019-02-01
北京隆源纳欣科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are limitations in the development and use of this kind of anti-oxidant coating. One is that the anti-oxidation temperature of the coating is too low, about 1000°C. Special steel, etc.), the cost of coating is too high, there is no universal applicability
Chinese patent CN200610076257.0 uses phosphate to prepare an anti-oxidation coating, but the use temperature is suitable for 1200 ° C, not suitable for high temperatures above 1300 ° C
[0007] At present, the performance of domestic high-temperature anti-oxidation coatings is obviously behind that of some developed countries. Due to the strict confidentiality of product formulas in developed countries, these coatings are expensive and difficult to buy in the domestic market.

Method used

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Examples

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preparation example Construction

[0016] 5. A method for preparing a water-based high-temperature-resistant and anti-oxidation inorganic coating as claimed in claim 1, characterized in that: comprising the following steps: 30-50 parts of inorganic binder, 10-40 parts of bauxite, 50-50 parts of water 100 parts, 3-5 parts of chromium oxide, 20-50 parts of magnesia, 20-50 parts of feldspar, 0-10 parts of industrial aluminum powder, 1-2 parts of additives. Add them to the mixing pot one by one, stir at high speed for 30-50 minutes, heat the mixed mixture in a ball mill jar and mill it for 24 hours, until the fineness of the mixture is less than 30 microns.

[0017] 6. The auxiliary agent according to claim 1 is one or more of defoamer, dispersant, wetting agent, leveling agent and thickener.

[0018] 7. The feldspar and boron carbide as claimed in claim 1 are paint grade, and the fineness is greater than 1200 mesh.

Embodiment 1

[0020] Coating ratio: inorganic binder 30; bauxite 25; water 60; magnesia 30; chromium oxide 0.5; feldspar 35; additive 0.8

[0021] Coating process: use a pressure spray gun to spray on the surface of the steel billet, with a thickness of about 500um, and dry at room temperature for 24 hours.

[0022] Heating equipment: silicon molybdenum rod heating furnace, in the environment of air as the medium.

[0023] Heating conditions: 1000 ° C for 2 hours, after the heat preservation is completed, it is out of the furnace, and the coating is intact.

Embodiment 2

[0025] Coating ratio: inorganic binder 40; bauxite 30; water 70; magnesia 40; chromium oxide 1.5; feldspar 35; additive 1.5; industrial aluminum powder 5

[0026] Coating process: use a pressure spray gun to spray on the surface of the steel billet, with a thickness of about 500um, and dry at room temperature for 24 hours.

[0027] Heating equipment: silicon molybdenum rod heating furnace, in the environment of air as the medium.

[0028] Heating conditions: 1200 ° C for 2 hours, after the heat preservation is completed, it is out of the furnace, and the coating is intact.

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Abstract

The invention discloses an anti-oxidation coating applied to high-temperature steel and a preparation method thereof, and belongs to the technical field of preparation of a high-temperature anti-oxidation coating. Based on the research of heat treatment of steel substrate, an anti-oxidation coating applied to high-temperature steel is developed. The anti-oxidation coating is especially suitable for long-term heat preservation process of carbon steel and silicon steel. The anti-oxidation coating applied to high-temperature steel is characterized in that: the coating comprises the following ingredients (by weight): an inorganic adhesive 30-50, bauxite 10-40, water 50-100, chromium oxide 3-5, magnesia 20-50, feldspar 20-50, industrial aluminum powder 0-10, and an auxiliary agent 1-2. The coating can be applied by the construction process such as spray coating, brush coating, roller coating and the like. The coating is applied on the surface of a workpiece to be heated and undergoes heat treatment with heating of the workpiece, thus effectively preventing high temperature oxidation of the workpiece during the heat treatment process.

Description

technical field [0001] The invention belongs to the technical field of high-temperature oxidation-resistant coatings. Based on the research on heat treatment of steel substrates, a high-temperature oxidation-resistant coating is developed, which is especially suitable for long-term thermal insulation and heat treatment processes of carbon steel and silicon steel. technical background [0002] Surface oxidation of steel materials will occur in high-temperature oxidizing atmospheres. Oxidation not only causes steel loss, but also leads to the depletion of alloy elements in steel, which affects the quality and mechanical properties of steel products. As we all know, before rolling, the steel billet generally needs to be heated or soaked in a heating furnace with a certain temperature and an oxidizing atmosphere. Since the billet is heated in the heating furnace for a long time, the surface of the billet undergoes a strong oxidation reaction with the oxygen in the atmosphere at ...

Claims

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Application Information

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IPC IPC(8): C09D1/02C09D1/04C09D1/00C09D7/61C09D7/48
CPCC09D1/00C09D1/02C09D1/04C09D7/48C09D7/61
Inventor 谢松洋李先民
Owner 北京隆源纳欣科技有限公司
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