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High efficiency self-stripping high temperature oxidation-prevention/decarbonization coating material

A coating material, anti-oxidation technology, applied in the field of coating materials, to achieve the effect of preventing oxidation/decarburization and strong adhesion

Inactive Publication Date: 2005-06-29
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, solving the contradiction between high temperature oxidation resistance / decarburization resistance and spalling of high temperature anti-oxidation coatings is still a problem that researchers are working hard to solve.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The weight ratio of binder: water glass is 1:1

[0025] glass powder

Quartz sand

silica sand

al 2 o 3

C

20％

33％

23％

24％

10％

[0026] The weight ratio of binder: water glass is 1:1.

[0027] Used to treat 9SiCr molds, the heat treatment process is 920℃ / 1h+water quenching. With the anti-oxidation / decarburization coating of the present invention, after heat treatment, the protective surface of the mold has a metallic luster; analysis and analysis show that there is no oxidation and decarburization on the protected surface; after quenching, the coating naturally peels off.

[0028] For 9SiCr steel, 1 # and 2 # Coatings can effectively prevent the surface oxidation of steel parts, 2 # After the paint is subjected to high temperature, it is easier to peel off, and the surface of the protected sample is smoother with less residue.

Embodiment 2

[0030] 2.1 # Sample: ingredient ratio

[0031] glass powder

Quartz sand

silica sand

Al 2 o 3

C

15％

31％

20％

24％

10％

[0032] The volume ratio of binder: polyvinyl alcohol + absolute ethanol is 1:2.

[0033] glass powder

Quartz sand

silica sand

al 2 o 3

C

15％

31％

22％

22％

10％

[0034] The volume ratio of binder: polyvinyl alcohol + absolute ethanol is 1:2

[0035] Used for heat treatment of Cr12MoV molds to prevent oxidation / decarburization. The surface of the mold is protected by the anti-oxidation / decarburization coating of the present invention. After the mold is heat-treated at 1150°C / 1.5h+oil quenching, the protected surface has a metallic luster. Analysis shows that no oxidation or decarburization occurs on the protected surface. After quenching, the coating naturally peels off.

[0036] For Cr12MoV die steel, 1 # Can ef...

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PUM

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Abstract

The invention relates to a coating material for metal heat treatment process, especially a protective coating material for preventing oxidation / decarburization of steel workpieces during heat treatment heating. Composed of binder and its formula by weight percentage is: 10-20% glass powder, 33-30% quartz sand, 23-20% silica sand, 24-20% Al2O3, 2-10% C; this high-efficiency self-stripping High-temperature anti-oxidation / decarburization coating material, widely applicable to anti-oxidation / decarburization of various steels when heated at 800-1200°C / 4-10 hours, and can be naturally peeled off in the subsequent cooling process. The surface of the steel workpiece after heat treatment still has the original metallic luster, and the surface layer of the steel workpiece still maintains the original chemical composition; this coating material is easy to use, has excellent anti-oxidation / decarburization effects, strong natural peeling ability, and wide applicability .

Description

Technical field: [0001] The invention relates to a coating material for metal heat treatment process, especially a protective coating material for preventing oxidation / decarburization of steel workpieces during heat treatment heating. Background technique: [0002] Heat treatment technology is an effective method to improve and adjust the mechanical properties of steel workpiece materials. However, when heated in an oxidizing atmosphere, the surface and surface oxidation / decarburization of the steel workpiece material will cause the surface hardness of the workpiece to decrease, and the workpiece will suffer early fatigue damage, which will damage the surface quality of the material and the overall quality of the workpiece. [0003] The use of anti-oxidation coating is one of the methods to prevent oxidation / decarburization of steel workpieces during heat treatment and heating. This method is convenient, simple and inexpensive. However, solving the contradiction between hig...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21D1/68
Inventor 贺跃辉任斌汤义武陈立宝李智刘峰晓江垚林小芹
Owner CENT SOUTH UNIV
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