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SiAlON-Al2O3-based high-temperature-resistant anti-oxidant coating for stainless steel

An anti-oxidation coating and high-temperature-resistant technology, applied in anti-corrosion coatings, coatings, etc., can solve the problems of poor chemical stability, easy cracking and falling off, etc., achieve low thermal expansion rate, not easy to crack and fall off, and enhance the effect of high temperature oxidation resistance

Inactive Publication Date: 2017-05-24
长兴天晟能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the problems of poor chemical stability and easy cracking and falling off of existing stainless steel high-temperature anti-oxidation coatings, and to provide a SiAlON-Al coating with good high temperature resistance and adhesion 2 o 3 High temperature and oxidation resistant coatings for base stainless steel

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] A SiAlON-Al 2 o 3 High-temperature resistant and anti-oxidation coatings for base stainless steel, consisting of the following raw materials in parts by weight: SiAlON-Al 2 o 3 30 parts of powder, 1 part of nano-zirconia powder, 20 parts of composite binder, 0.5 part of potassium fluoroborate, 0.5 part of boron carbide, the particle size of each of the above components is 300-500 mesh.

[0033] Among them, SiAlON-Al 2 o 3 The powder is prepared by the following method:

[0034] (1) The weight parts are respectively 20 parts of microcrystalline muscovite and 10 parts of aluminum powder mixed uniform base material, place in the ball mill jar, use absolute ethanol as medium ball mill 8h, wherein base material and absolute ethanol mass ratio are 1.5:1;

[0035] (2) Dry the mixture after ball milling in step (1) at 50°C, and then dry mix for 30 minutes;

[0036] (3) Compress the dry-blended mixture with a pressure of 100MPa, keep the pressure for 2 hours, then place i...

Embodiment 2

[0045] A SiAlON-Al 2 o 3 High-temperature resistant and anti-oxidation coatings for base stainless steel, consisting of the following raw materials in parts by weight: SiAlON-Al 2 o 3 40 parts of powder, 2 parts of nano-zirconia powder, 25 parts of composite binder, 1 part of potassium fluoroborate, 1 part of boron carbide, the particle size of each of the above components is 300-500 mesh.

[0046] Among them, SiAlON-Al 2 o 3 The powder is prepared by the following method:

[0047] (1) The weight parts are respectively 22 parts of microcrystalline muscovite and 12 parts of aluminum powder mixed uniform base material, placed in a ball mill jar, with absolute ethanol as the medium ball milling 9h, wherein the mass ratio of base material to absolute ethanol 1.7:1;

[0048] (2) Dry the mixture after ball milling in step (1) at 70°C, and then dry mix for 35 minutes;

[0049] (3) Compress the dry-blended mixture with a pressure of 110 MPa, keep the pressure for 3 hours, then ...

Embodiment 3

[0058] A SiAlON-Al 2 o 3 High-temperature resistant and anti-oxidation coatings for base stainless steel, consisting of the following raw materials in parts by weight: SiAlON-Al 2 o 3 50 parts of powder, 3 parts of nano-zirconia powder, 30 parts of composite binder, 1.5 parts of potassium fluoroborate, 1.5 parts of boron carbide, the particle size of each of the above components is 300-500 mesh.

[0059] Among them, SiAlON-Al 2 o 3 The powder is prepared by the following method:

[0060] (1) The base material that is respectively 25 parts of microcrystalline muscovite and 15 parts of aluminum powder by weight is placed in a ball mill jar, and ball milled with absolute ethanol as a medium for 10 hours, wherein the mass ratio of base material to absolute ethanol 2:1;

[0061] (2) Dry the mixture after ball milling in step (1) at 80°C, and then dry mix for 40 minutes;

[0062] (3) Compress the dry-blended mixture with a pressure of 120 MPa, keep the pressure for 4 hours, t...

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Abstract

The invention discloses a SiAlON-Al2O3-based high-temperature-resistant anti-oxidant coating for stainless steel. The SiAlON-Al2O3-based high-temperature-resistant anti-oxidant coating for the stainless steel consists of the following raw materials in parts by weight: 30 to 50 parts of SiAlON-Al2O3 powder, 1 to 3 parts of nano-zirconium oxide powder, 20 to 30 parts of a composite adhesive, 0.5 to 1.5 parts of potassium fluoborate and 0.5 to 1.5 parts of boron carbide. According to the SiAlON-Al2O3-based high-temperature-resistant anti-oxidant coating for the stainless steel, the SiAlON-Al2O3 material is taken as filler, so that the high temperature resistance and the chemical stability of the coating are improved; the composite adhesive is prepared by adopting phthalocyanine resin prepolymer, so that the stability and the viscidity of the adhesive at a high temperature are improved, and a coating does not crack or fall off easily. The coating provided by the invention can be sprayed or brushed onto the surface of a steel blank at room temperature to 500 DEG C; after heat machining is completed, the coating can fall off naturally during a cooling process.

Description

technical field [0001] The invention relates to the technical field of coatings, in particular to a SiAlON-Al 2 o 3 High temperature and oxidation resistant coatings for base stainless steel. Background technique [0002] In the current steel rolling process, whether it is ordinary steel or special steel, during heat treatment processes such as rolling, forging, quenching, annealing, and normalizing, surface oxidation is prone to occur under high temperature, and it will also be accompanied by alloy elements. depletion and decarbonization. This phenomenon directly restricts the improvement of rolled steel yield and affects the surface quality of finished steel. At present, there are high-temperature coating method, vacuum method and protective atmosphere method to prevent iron and steel products from oxidation and burning. The vacuum method and the protective atmosphere method are to place the steel products in a vacuum environment or an inert gas protection environment ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D179/04C09D5/08C09D7/12C08G73/06
CPCC08G73/0672C08K3/00C08K3/22C08K3/34C08K2003/2244C08K2201/003C08K2201/011C09D5/08C09D7/61C09D179/04
Inventor 佘海中
Owner 长兴天晟能源科技有限公司
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