SiAlON-SiC common steel heat treatment anti-oxidant coating and using method thereof

An anti-oxidation coating and ordinary steel technology, applied in fire-resistant coatings, coatings, etc., can solve the problems of easy cracking and peeling, poor chemical stability, etc., and achieve the effects of not easy cracking and peeling, low thermal expansion rate, and shortened sintering holding time.

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 the existing ordinary steel heat treatment anti-oxidation coating, and provide a SiAlON-SiC ordinary steel heat treatment anti-oxidation coating with good high temperature resistance and adhesion

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] A kind of SiAlON-SiC ordinary steel heat treatment anti-oxidation paint, is made up of the raw material of following weight part: SiAlON-SiC powder body 30 parts, Cr 2 o 3 3 parts, 20 parts of composite binder, 0.5 part of potassium fluoroborate, 0.5 part of boron carbide, and the particle size of the above components is 300 mesh.

[0033] Among them, SiAlON-SiC powder is prepared by the following method:

[0034] (1) The parts by weight are 12 parts of Si powder, 15 parts of Al powder and 10 parts of SiO 2 SiC powder and 30 parts of SiC powder are uniformly mixed base material, placed in a ball mill tank, ball milled with water for 2.5 hours, and then freeze-dried, wherein the mass ratio of base material to water is 1.5:1;

[0035] (2) Compress the dried mixture in step (1) under a pressure of 40 MPa, and hold the pressure for 2 hours;

[0036] (3) Put the compressed mixture in a microwave high-temperature atmosphere furnace, first raise the temperature to 1300°C an...

Embodiment 2

[0045] A kind of SiAlON-SiC ordinary steel heat treatment anti-oxidation paint, is made up of the raw material of following weight part: SiAlON-SiC powder body 40 parts, Cr 2 o 3 4 parts, 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 400 mesh.

[0046] Among them, SiAlON-SiC powder is prepared by the following method:

[0047] (1) The parts by weight are 14 parts of Si powder, 17 parts of Al powder, and 12 parts of SiO 2 SiC powder and 35 parts of SiC powder were uniformly mixed as a base material, placed in a ball mill jar, ball milled with water for 2.5 hours, and then freeze-dried, wherein the mass ratio of base material to water was 1.7:1;

[0048] (2) Compress the dried mixture in step (1) under a pressure of 45 MPa, and keep the pressure for 2.5 hours;

[0049] (3) Place the compressed mixture in a microwave high-temperature atmosphere furnace, first raise the temperature t...

Embodiment 3

[0058] A kind of SiAlON-SiC ordinary steel heat treatment anti-oxidation paint, is made up of the raw material of following weight part: SiAlON-SiC powder body 50 parts, Cr 2 o 3 5 parts, 30 parts of composite binder, 1.5 parts of potassium fluoroborate, 1.5 parts of boron carbide, and the particle size of the above components is 500 mesh.

[0059] Among them, SiAlON-SiC powder is prepared by the following method:

[0060] (1) The parts by weight are 16 parts of Si powder, 19 parts of Al powder and 15 parts of SiO 2 SiC powder and 40 parts of SiC powder were uniformly mixed as a base material, placed in a ball mill jar, milled with water for 3 hours, and then freeze-dried, wherein the mass ratio of base material to absolute ethanol was 2:1;

[0061] (2) Compress the dried mixture in step (1) under a pressure of 50 MPa, and hold the pressure for 3 hours;

[0062] (3) Put the compressed mixture in a microwave high-temperature atmosphere furnace, first raise the temperature to...

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Abstract

The invention discloses a SiAlON-SiC common steel heat treatment anti-oxidant coating and a using method thereof. The SiAlON-SiC common steel heat treatment anti-oxidant coating consist of the following raw materials in parts by weight: 30 to 50 parts of SiAlON-SiC powder, 3 to 5 parts of Cr2O3, 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-SiC common steel heat treatment anti-oxidant coating, the SiAlON-SiC 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-SiC ordinary steel heat treatment anti-oxidation coating and its application method. 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 fo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D179/04C09D5/20C09D7/12C08G73/06
CPCC08G73/0672C08K3/00C08K3/22C08K3/34C08K2003/2251C08K2201/014C09D5/18C09D5/20C09D7/61C09D179/04
Inventor 佘海中
Owner 长兴天晟能源科技有限公司
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