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Anti-carburizing painting capable of being removed through washing after quenching and preparation method thereof

A technology of anti-carburizing coatings and materials, applied in the field of anti-carburizing coatings, can solve problems such as low temperature resistance, affecting carburizing quality, interfering with carburizing atmosphere, etc., achieves strong acid resistance, excellent coating performance, and does not affect carburizing The effect of carbon atmosphere

Inactive Publication Date: 2015-12-09
NANJING KERUN LUBRICANTS +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the water-based resin as the main component of this coating is an organic substance that is not resistant to high temperatures, and it will decompose during the carburizing process, which will interfere with the carburizing atmosphere and affect the carburizing quality.

Method used

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  • Anti-carburizing painting capable of being removed through washing after quenching and preparation method thereof
  • Anti-carburizing painting capable of being removed through washing after quenching and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] An anti-carburization coating that can be washed and removed after quenching, consisting of 26% boric acid, 3% lithium-based bentonite, 5% kaolin, 8% titanium dioxide, 25% aluminum dihydrogen phosphate, 1% It is formulated with zinc chrome yellow and 32% water.

[0026] Use the anti-carburizing coating of embodiment 1 to carry out anti-carburizing treatment to the gear that material is 20CrNi2Mo, and carburizing process is 940 ℃ of heating 110h, and carburizing layer depth is 4.1-4.8mm, direct quenching after carburizing, the workpiece after quenching After soaking in water at 50°C for 3 hours, the anti-carburization coating on the surface of the workpiece peeled off completely. The structure of its surface after the anti-carburizing coating of embodiment 1 is brushed on the workpiece is as follows: figure 1 shown. Because the anti-carburizing coating of embodiment 1 has good anti-seepage effect, can effectively prevent carbon atoms from penetrating into the workpiece...

Embodiment 2

[0029] An anti-carburization coating that can be washed and removed after quenching, consisting of 25% boric acid, 5% lithium-based bentonite, 10% titanium dioxide, 15% aluminum dihydrogen phosphate, 5% chrome yellow and 40 % of water prepared.

Embodiment 3

[0031] An anti-carburizing coating that can be washed and removed after quenching, consisting of 35% boric acid, 3% lithium-based bentonite, 14% titanium dioxide, 16% aluminum dihydrogen phosphate, and 2% tetrabasic zinc Yellow and 30% water.

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Abstract

The invention discloses an anti-carburizing painting capable of being removed through washing after quenching. The anti-carburizing painting is prepared from, by mass, 25%-35% of boric acid, 15%-25% of filling, 15%-25% of aluminum dihydrogen phosphate, 1%-5% of tinting pigment and 30%-40% of water. The invention further discloses a preparation method of the anti-carburizing painting capable of being removed through washing after quenching. The anti-carburizing painting can be removed through washing after carburizing heat treatment, so that the problem that a traditional anti-carburizing painting is difficult to peel off after the carburizing heat treatment is solved. An inorganic heat-resisting material serves as an anti-carburizing agent in the formula of the anti-carburizing painting, so that an anti-carburizing coating formed after the anti-carburizing agent is brushed on the surface of a workpiece is good in cohesiveness, capable of not peeling and capable of not flowing at a high temperature, and the carburizing atmosphere is not influenced.

Description

technical field [0001] The invention relates to an anti-carburization coating, in particular to an anti-carburization coating which can be washed and removed after quenching, and also relates to a preparation method of the anti-carburization coating which can be washed and removed after quenching. Background technique [0002] Gears and other mechanical parts generally need to be carburized on the working surface or force-bearing surface after machining, and then quenched or other heat treatment to improve their mechanical properties, chemical properties and processing properties. In order to prevent the surface of the secondary processing in the subsequent process from producing brittleness and hardness and damage the processing tool, it is necessary to perform anti-carburization treatment on the surface of the workpiece during carburizing. The anti-carburization methods of steel parts mainly include mechanical processing method, copper plating method and anti-carburization...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21D1/70
Inventor 聂晓霖刘昊祝剑剑黄国都
Owner NANJING KERUN LUBRICANTS
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