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Decarburization-resistant coating

An anti-decarburization and coating technology, applied in the field of metal heat treatment materials, can solve the problems of increasing the removal of scale and decarburization layer treatment processes, affecting the economic benefits of steel materials, tissue damage, etc., and achieves good self-stripping , reduce machining allowance, prevent oxidation and decarburization effect

Inactive Publication Date: 2015-12-23
JINAN HAOZE ENVIRONMENTAL PROTECTION TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Iron and steel materials are often oxidized during thermal processing, resulting in substrate corrosion and surface decarburization, which not only damages the structure of the material, but also increases the process of removing scale and decarburization, which seriously affects the production of steel materials. economic benefits

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment １

[0016] by weight Na 2 O nSiO 2 50 parts, Al 2 o 3 40 parts, Cr 2 o 3 40 servings.

[0017] Na 2 O nSiO 2 where n is 1.8.

[0018] The thickness is 2.5mm.

[0019] The coating of the present invention is used for workpiece protection, put into a furnace and heated to austenitization, and then quenched after heat preservation. The surface of the workpiece after quenching is as smooth as new, and the protected surface is free from oxidation and decarburization. The coating can effectively prevent oxidation and decarburization of steel at 850-1300°C, and has good self-stripping property when cooling.

[0020] Example 2

Embodiment 2

[0022] Na 2 O nSiO 2 where n is 3.

[0023] The thickness is 0.5mm.

[0024] The coating of the present invention is used for workpiece protection, put into a furnace and heated to austenitization, and then quenched after heat preservation. The surface of the workpiece after quenching is as smooth as new, and the protected surface is free from oxidation and decarburization. The coating can effectively prevent oxidation and decarburization of steel at 850-1300°C, and has good self-stripping property when cooling.

[0025] Example 3

Embodiment 3

[0027] Na 2 O nSiO 2 where n is 1.2.

[0028] The thickness is 2mm.

[0029] The coating of the present invention is used for workpiece protection, put into a furnace and heated to austenitization, and then quenched after heat preservation. The surface of the workpiece after quenching is as smooth as new, and the protected surface is free from oxidation and decarburization. The coating can effectively prevent oxidation and decarburization of steel at 850-1300°C, and has good self-stripping property when cooling.

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Abstract

The invention discloses a decarburization-resistant coating. The decarburization-resistant coating consists of Na2O.SiO2, Al2O3 and Cr2O3. The decarburization-resistant coating adopts relatively cheaper industrial raw materials, is reasonable in formula and great in high temperature resistance, can greatly reduce oxidization decarburization during thermal treatment, can automatically fall off from the surface of a base body after the heating of a workpiece is finished, and thus has great application prospects.

Description

technical field [0001] The invention relates to the technical field of materials for metal heat treatment process, in particular to an anti-decarburization coating. Background technique [0002] Iron and steel materials are often oxidized during thermal processing, resulting in substrate corrosion and surface decarburization, which not only damages the structure of the material, but also increases the process of removing scale and decarburization, which seriously affects the production of steel materials. economic benefits. How to realize the non-oxidative decarburization treatment of the workpiece is a problem that has been pursued in the industry. [0003] The use of anti-oxidation coating is one of the methods to prevent oxidative decarburization during heat treatment of steel workpieces. It has very practical significance to develop anti-oxidation coatings with high temperature resistance and low price. Contents of the invention [0004] The object of the present in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21D1/70
Inventor 冉德焕
Owner JINAN HAOZE ENVIRONMENTAL PROTECTION TECH CO LTD
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