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High-temperature-resistant anti-oxidation paint for common steel and use method of high-temperature-resistant anti-oxidation paint

An anti-oxidation coating and high-temperature-resistant technology, which is applied in the direction of fire-proof coatings and coatings, can solve the problems of easy cracking and falling off, poor chemical stability, etc., and achieve the effects of not easy cracking and falling off, low thermal expansion rate, and shortening the sintering holding time

Active Publication Date: 2016-12-14
浙江钜安拓新材料有限公司
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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 common steel high temperature resistant and anti-oxidation coatings, and provide a common steel high temperature resistant and anti-oxidation coating with good high temperature resistance and cohesiveness

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] A high-temperature anti-oxidation coating for ordinary steel, which is composed of the following raw materials by weight: Al 2 O 3 -30 parts of SiAlON-SiC powder, Cr 2 O 3 3 parts, 20 parts of composite binder, 0.5 parts of potassium fluoroborate, 0.5 parts of boron carbide, the particle size of the above components is 300 mesh.

[0033] Where Al 2 O 3 -SiAlON-SiC powder is prepared by the following method:

[0034] (1) Put the base material with 20 parts of fused corundum, 20 parts of alumina powder, 10 parts of Si powder and 5 parts of β-SiAlON powder by weight respectively, and place them in a ball mill tank, and use water as a medium to ball mill for 1 hour. The mass ratio of base material to water is 1.5:1;

[0035] (2) Dry the ball milled mixture in step (1) at 80°C, and then dry blend for 20 minutes;

[0036] (3) Press the dry-mixed mixture at a pressure of 70 MPa, hold the pressure for 2 hours, and then bake it at 180°C for 5 hours, then place it in a microwave high-te...

Embodiment 2

[0045] A high-temperature anti-oxidation coating for ordinary steel, which is composed of the following parts by weight of raw materials: Al 2 O 3 -SiAlON-SiC powder 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 the above components is 400 mesh.

[0046] Where Al 2 O 3 -SiAlON-SiC powder is prepared by the following method:

[0047] (1) Put 30 parts of fused corundum, 25 parts of alumina powder, 15 parts of Si powder and 7 parts of β-SiAlON powder into a uniformly mixed base material, put them in a ball mill tank, and use water as a medium for ball milling for 1.5 hours , The mass ratio of base material to water is 1.7:1;

[0048] (2) Dry the ball-milled mixture in step (1) at 90°C, and then dry-mix for 25 minutes;

[0049] (3) Press the dry-mixed mixture at a pressure of 75MPa, hold the pressure for 2.5h, then bake it at 190℃ for 6h, then place it in a microwave high-temperature atmosphere fu...

Embodiment 3

[0058] A high-temperature anti-oxidation coating for ordinary steel, which is composed of the following parts by weight of raw materials: Al 2 O 3 -SiAlON-SiC powder 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, the particle size of the above components is 500 mesh.

[0059] Where Al 2 O 3 -SiAlON-SiC powder is prepared by the following method:

[0060] (1) Put 40 parts of fused corundum, 30 parts of alumina powder, 20 parts of Si powder and 10 parts of β-SiAlON powder into a uniformly mixed base material, place them in a ball mill tank, and use water as a medium for ball milling for 2 hours. The mass ratio of base material to water is 2:1;

[0061] (2) Dry the ball milled mixture in step (1) at 100°C, and then dry blend for 30 minutes;

[0062] (3) Press the dry-mixed mixture at a pressure of 80 MPa, hold the pressure for 3 hours, and then bake it at 200°C for 8 hours, then place it in a microwave high-temp...

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Abstract

The invention discloses a high-temperature-resistant anti-oxidation paint for common steel and a use method of the high-temperature-resistant anti-oxidation paint. The high-temperature-resistant anti-oxidation paint and the use method aim at solving the problems that existing high-temperature-resistant anti-oxidation paint for common steel is poor in chemical stability and likely to crack and shed. The high-temperature-resistant anti-oxidation paint for common steel is prepared from, by weight, 30-50 parts of Al2O3-SiAlON-SiC powder, 3-5 parts of Cr2O3, 20-30 parts of a composite adhesive, 0.5-1.5 parts of potassium fluoborate and 0.5-1.5 parts of boron carbide. By adopting the Al2O3-SiAlON-SiC material as filler of the high-temperature-resistant anti-oxidation paint for common steel, the high temperature resistance and chemical stability of the high-temperature-resistant anti-oxidation paint for common steel are improved; by adopting a phthalocyanine resin prepolymer to prepare the composite adhesive, the stability and adhesiveness of the adhesive at a high temperature are improved, a coating is not likely to crack or shed, and the high temperature oxidation resisting capability of the coating is improved. The high-temperature-resistant anti-oxidation paint for common steel can be sprayed and brushed on the surface of billet steel at the room temperature to 500 DEG C; after processing is finished, the coating can shed naturally in the cooling process, and the dephosphorization difficulty is lowered.

Description

Technical field [0001] The invention relates to the technical field of coatings, in particular to a high-temperature resistant and anti-oxidation coating for ordinary steel and a use method thereof. Background technique [0002] In the current steel rolling process, whether it is ordinary steel or special steel, during the heat treatment process such as rolling, forging, quenching, annealing, and normalizing, surface oxidation is prone to occur under the action of high temperature, and it is also accompanied by alloying elements. Depletion and decarbonization. This phenomenon directly restricts the improvement of rolled steel yield and affects the surface quality of finished steel. At present, methods to prevent oxidative burning of steel products include high temperature coating method, vacuum method and protective atmosphere method. Vacuum method and protective atmosphere method is to place steel products in a vacuum environment or inert gas protection environment for heating...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D179/00C09D7/12C08G73/00
CPCC08G73/00C08K3/22C08K3/34C08K3/38C08K2003/2251C08L2201/08C09D5/18C09D7/61C09D179/00
Inventor 王家邦涂柏顺
Owner 浙江钜安拓新材料有限公司
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