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Anti-oxidation coating applied to 9crmocob steel thermal processing and application method

An anti-oxidation coating and thermal processing technology, applied in the direction of anti-corrosion coatings, coatings, etc., can solve the problems of easy surface oxidation, lower yield and increased production cost, and achieve moderate surface tension, strong chemical bonding, and improved The effect of adhesion

Active Publication Date: 2021-05-04
NORTHEASTERN UNIV LIAONING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to solve the above-mentioned problems in the prior art, the present invention provides an anti-oxidation coating applied to the thermal processing of 9CrMoCoB steel, which is used to solve the problem that the surface is prone to oxidation during the thermal processing of 9CrMoCoB steel, resulting in low yield and high production cost.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] The present embodiment provides a kind of antioxidation coating that is applied to 9CrMoCoB steel in thermal processing, and the basic composition of this coating has powder (Al 2 o 3 , SiO 2 , B 4 C and SiC), binder (aluminum dihydrogen phosphate aqueous solution), additive (CeO 2 ). Among them: SiO 2 35g, Al 2 o 3 22g, B 4 C 20g, SiC 15g and CeO 2 3g, the particle size of the powder is 0.2 microns or less. Add the above-mentioned powder and additives into a volume of 25 mL of aluminum dihydrogen phosphate aqueous solution (concentration is 1.35 g / cm 3 ), stirred evenly (put into a ball mill and stirred at 150r / min for 8h) to prepare an anti-oxidation coating, which was designated as Coating-1.

[0047] Put the above-prepared coating-1 into the spray gun, and use the spray gun to spray on the surface of the 9CrMoCoB steel workpiece sample, the average thickness is controlled below 100μm, the spray gun spray pressure is fixed at 0.2Mpa, and it is naturally d...

Embodiment 2

[0050] The present embodiment provides a kind of antioxidation coating that is applied to 9CrMoCoB steel in thermal processing, and the basic composition of this coating has powder (Al 2 o 3 , SiO 2 , B 4 C and SiC), binder (aluminum dihydrogen phosphate aqueous solution), additive (CeO 2 ). Among them: SiO 2 35g, Al 2 o 3 22g, B 4 C 25g, SiC 15g and CeO 2 1g, the particle size of the powder is 0.2 microns or less. Add the above-mentioned powder and additives into a volume of 25mL of aluminum dihydrogen phosphate aqueous solution (concentration is 1.31g / cm 3 ), stirred evenly (put into a ball mill and stirred at 150r / min for 8h) to prepare an anti-oxidation coating, which was recorded as Coating-2.

[0051] Put the above-prepared coating-2 into the spray gun, and use the spray gun to spray on the surface of the 9CrMoCoB steel workpiece sample. The average thickness is controlled below 100μm, the spray gun spray pressure is fixed at 0.2Mpa, and it is naturally dried...

Embodiment 3

[0054] The present embodiment provides a kind of antioxidation coating that is applied to 9CrMoCoB steel in thermal processing, and the basic composition of this coating has powder (Al 2 o 3 , SiO 2 , B 4 C and SiC), binder (aluminum dihydrogen phosphate aqueous solution), additive (CeO 2 ). Among them: SiO 2 35g, Al 2 o 3 20g, B 4 C 20g, SiC 25g and CeO 2 5g, the particle size of the powder is 0.2 microns or less. Add the above-mentioned powder and additives into a volume of 25mL of aluminum dihydrogen phosphate aqueous solution (concentration is 1.34g / cm 3 ), stirred evenly (put into a ball mill and stirred at 150r / min for 8h) to prepare an anti-oxidation coating, which was recorded as Coating-3.

[0055] Put the above-prepared coating-3 into the spray gun, and use the spray gun to spray on the surface of the 9CrMoCoB steel workpiece sample. The average thickness is controlled below 100μm, the spray gun spray pressure is fixed at 0.2Mpa, and it is naturally dried...

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Abstract

The invention relates to the technical field of thermal processing of 9CrMoCoB steel, in particular to an anti-oxidation coating applied to thermal processing of 9CrMoCoB steel and a use method. The anti-oxidation coating of the present invention includes powder and a binder, and the powder and the binder are evenly mixed to make the anti-oxidation coating, wherein the powder comprises by weight parts: SiO 2 30‑40 parts, Al 2 o 3 20‑25 copies, B 4 C 20‑25 parts, SiC 15‑25 parts. Using Al 2 o 3 , SiO 2 , B 4 C and SiC are used as the powder part of the anti-oxidation coating, so that the anti-oxidation coating has the following excellent physical and chemical properties: chemical stability, corrosion resistance, oxidation resistance, surface tension, wetting performance and other characteristics.

Description

technical field [0001] The invention relates to the technical field of thermal processing of 9CrMoCoB steel, in particular to an anti-oxidation coating applied to thermal processing of 9CrMoCoB steel and a use method. Background technique [0002] Electricity has become an indispensable energy source in today's society. my country's electricity source is still dominated by thermal power generation. Although the proportion of nuclear power, wind power and solar power generation has increased, thermal power generation still accounts for 70% of the total power generation, and coal used for power generation accounts for 50% of the total coal consumption. about. In order to achieve the strategic goal of energy saving and emission reduction, it is very important for thermal power plants to develop power generation equipment with high parameters, low pollution and high thermal efficiency. At present, my country's thermal power units are developing towards ultra-super steam turbine...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D1/00C09D7/61C09D5/08
CPCC09D1/00C09D5/08C09D7/61
Inventor 姜周华耿鑫李晓凯彭雷朕侯昱李花兵刘福斌李星李博洋
Owner NORTHEASTERN UNIV LIAONING