SiC-MgO-SiAlON ordinary steel heat treatment antioxidant coating and application method thereof

An anti-oxidation coating and ordinary steel technology, applied in the coating field, 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 reducing the difficulty of phosphorus removal.

Inactive Publication Date: 2017-05-17
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 SiC-MgO-SiAlON 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 SiC-MgO-SiAlON common steel heat treatment anti-oxidation paint, is made up of the raw material of following weight part: Al 2 o 3 -SiAlON-SiC powder 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, SiC-MgO-SiAlON powder is prepared by the following method:

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

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

[0036] (3) The dry-blended mixture was pressed into shape at a pressure of 70MPa, kept under pressure for 2h, then baked at 180°C for 5h, then placed i...

Embodiment 2

[0045] A kind of SiC-MgO-SiAlON common steel heat treatment anti-oxidation paint, is made up of the raw material of following weight part: 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 each of the above components is 400 mesh.

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

[0047] (1) Put 30 parts by weight of fused corundum, 25 parts of magnesium oxide powder, 15 parts of Si powder and 7 parts of β-SiAlON powder into the base material, put it in a ball mill tank, and use water as the medium for ball milling for 1.5 hours , wherein the mass ratio of base material to water is 1.7:1;

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

[0049] (3) The dry-blended mixture was pressed into shape at a pressure of 75 MPa, kept under pressure for 2.5 hours, then baked at 190°C f...

Embodiment 3

[0058] A kind of SiC-MgO-SiAlON common steel heat treatment anti-oxidation paint, is made up of the raw material of following weight part: 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, and the particle size of the above components is 500 mesh.

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

[0060] (1) Put 40 parts by weight of fused corundum, 30 parts of magnesium oxide powder, 20 parts of Si powder and 10 parts of β-SiAlON powder into the base material, put it in a ball mill tank, and use water as the medium for ball milling for 2 hours. Wherein the mass ratio of base material to water is 2:1;

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

[0062] (3) The dry-blended mixture was pressed into shape at a pressure of 80MPa, kept under pressure for 3h, then baked at 200°C for 8h, th...

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Abstract

The invention relates to the technical field of coatings, and discloses a SiC-MgO-SiAlON ordinary steel heat treatment antioxidant coating and an application method thereof. A SiC-MgO-SiAlON material is adopted as filler of the coating, and the high temperature resistance and chemical stability of the coating are improved; and a phthalocyanine resin prepolymer is adopted for preparing a composite binder, the stability and stickiness of the binder at the high temperature are improved, a coating is not prone to cracking and falling off, and the high-temperature oxidization resisting capacity of the coating is enhanced. The surface of a steel blank with the room temperature being 500 DEG C can be coated or brushed with the coating, after heat machining is completed, the coating can naturally fall off in the cooling process, and the dephosphorization difficulty is reduced. The coating is prepared from, by weight, 30-50 parts of SiC-MgO-SiAlON powder, 3-5 parts of Cr2O3, 20-30 parts of the composite binder, 0.5-1.5 parts of potassium fluoborate and 0.5-1.5 parts of boron carbide.

Description

technical field [0001] The invention relates to the technical field of coatings, in particular to a SiC-MgO-SiAlON ordinary steel heat treatment anti-oxidation coating and a using method thereof. 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 environmen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21D1/72
CPCC21D1/72
Inventor 佘海中
Owner 长兴天晟能源科技有限公司
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