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Anti-decarbonizing agent for bearing steel thermal treatment for preparing bearing and preparation method thereof

An anti-decarburization agent and bearing steel technology, which is applied in the field of anti-decarburization agent for heat treatment of bearing steel, can solve the problems of poor comprehensive performance of high-temperature protective coatings, achieve the effects of reducing oxidation, improving processing efficiency, and reducing steel decarburization

Active Publication Date: 2014-08-27
广德中隆轴承有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] One of the technical problems to be solved by the present invention is that the comprehensive performance of the existing high-temperature protective coating for bearing steel is not good, especially when it is higher than 1200 ° C, it is used for high-carbon chromium bearing steel and has the functions of anti-oxidation and anti-decarburization at the same time. Provide an anti-decarburization agent for heat treatment of bearing steel used in the preparation of bearings at a high temperature to protect against the defects of coatings

Method used

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  • Anti-decarbonizing agent for bearing steel thermal treatment for preparing bearing and preparation method thereof
  • Anti-decarbonizing agent for bearing steel thermal treatment for preparing bearing and preparation method thereof
  • Anti-decarbonizing agent for bearing steel thermal treatment for preparing bearing and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] The bearing steel heat treatment anti-decarburization agent for preparing bearings is prepared from the following raw materials in parts by weight:

[0021]

[0022] The preparation method of the above bearing steel heat treatment anti-decarburization agent for bearings is to first heat water to 60-70°C, add borax and stir to dissolve, after it is completely dissolved, add defoamer, stir well and then gradually add modulus 1.5 water glass and stir well.

[0023] Use Φ10 GCr15 bearing round steel samples to conduct experiments. The initial steel samples have no decarburized layer, and the height of each sample is 50mm. The samples are first heated in a heating furnace to 400°C-500°C to remove the oil on the surface. , wash the residual dirt and rust on the surface with dilute hydrochloric acid solution, then wash it with ultrasonic vibration water three times, and dry it for later use.

[0024] Heat the anti-decarburization agent for heat treatment of bearing steel u...

Embodiment 2

[0026] The bearing steel heat treatment anti-decarburization agent for preparing bearings is prepared from the following raw materials in parts by weight:

[0027]

[0028] All the other are the same as Example 1, and the results are shown in Table 1.

Embodiment 3

[0030] The bearing steel heat treatment anti-decarburization agent for preparing bearings is prepared from the following raw materials in parts by weight:

[0031]

[0032] All the other are the same as Example 1, and the results are shown in Table 1.

[0033] Table 1

[0034] sample

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Abstract

The invention discloses an anti-decarbonizing agent for bearing steel thermal treatment for preparing a bearing. The anti-decarbonizing agent is prepared from the following raw materials in parts by weight: 5-10 parts of borax, 5-15 parts of water glass with modulus of 1.5, 1-3 parts of defoamer and 72-89 parts of water. The preparation method comprises the following steps: first, heating water to 60-70 DEG C; adding borax to stir and dissolve; adding the defoamer till borax is fully dissolved; and uniformly stirring and gradually adding water glass with modulus of 1.5 to obtain the anti-decarbonizing agent. The anti-decarbonizing agent disclosed by the invention can form a compact chemical protective film on the surface of bearing steel to prevent a decarbonizing layer from being formed on the surface of the bearing steel due to thermal treatment, so that the grinding allowance can be reduced by 20-30%, thereby improving the processing efficiency. As the compact chemical protective film on the surface of a steel product can isolate corrosion of oxygen and water vapor in a put process after thermal treatment, anti-rust treatment is reduced or avoided. The anti-decarbonizing agent disclosed by the invention is particularly suitable for thermal treatment of a mesh belt furnace.

Description

technical field [0001] The invention relates to the technical field of bearing preparation, in particular to an anti-decarburization agent for heat treatment of bearing steel used for preparing bearings. Background technique [0002] The bearing steel used to prepare bearings is hypereutectoid steel, and the carbon content ranges from 0.95% to 1.05%. Any part of the steel with a carbon content lower than 0.95% should be regarded as decarburization. Decarburization is divided into full decarburization layer and partial decarburization layer. The fully decarburized layer is the area where all carbon is lost after the surface of the steel is decarburized, showing all the ferrite structure. Partially decarburized layer refers to the area where part of the carbon is lost after the surface of the steel is decarburized, that is, the area where the structure is different from the matrix structure except for the entire decarburized layer. Including sub-layer (pearlite + ferrite) an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21D1/68
Inventor 陈奇辉
Owner 广德中隆轴承有限公司
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