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Gas nitriding treatment method of 11Cr17 stainless steel slip sheet

A technology of gas nitriding and treatment method, which is applied in the direction of coating, metal material coating process, solid-state diffusion coating, etc., which can solve the problems of environmental pollution caused by salt bath treatment liquid, unfavorable industrial production of enterprises, and large production cost. Achieve the effects of low production cost, improved service life and low environmental pollution

Active Publication Date: 2012-06-27
浙江百达精工股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the performance and efficiency of the above-mentioned salt bath nitriding method are very high, the salt bath treatment liquid pollutes the environment more seriously, and it also brings relatively large production costs in the subsequent treatment of waste liquid, which is not conducive to enterprises. industrial production of

Method used

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  • Gas nitriding treatment method of 11Cr17 stainless steel slip sheet
  • Gas nitriding treatment method of 11Cr17 stainless steel slip sheet

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] a) Degreasing and cleaning: Use degreasing agent, aviation kerosene or alcohol to degrease and clean the 11Cr17 stainless steel slide to remove surface oil;

[0025] b) Depassivation film treatment: Put the above-mentioned degreased and cleaned 11Cr17 stainless steel slide into the nitriding furnace, vacuumize, then pass in nitrogen to break the air to normal pressure, stop nitrogen, and use nitrogen to exhaust the nitriding furnace After the air inside is more conducive to removing the passivation film, replace the air in the furnace with nitriding, then raise the temperature of the furnace to 300°C, and control the temperature at 300°C to 350°C, and start adding the film remover dropwise Carry out depassivation film treatment 120min to above-mentioned sliding sheet, wherein the speed of dripping film removal agent is 90~140 drop / min, and described film removal agent is the citric acid methanol solution that mass concentration is 5%, removes Passivation film on the sur...

Embodiment 2

[0028] a) degreasing, cleaning: adopt 5% degreasing agent aqueous solution to carry out degreasing cleaning to 11Cr17 stainless steel sliding piece, remove surface greasy dirt, above-mentioned degreasing agent aqueous solution is alkaline degreasing agent aqueous solution;

[0029] b) Depassivation film treatment: Put the above-mentioned degreased and cleaned 11Cr17 stainless steel slide into the nitriding furnace, vacuumize, then pass in nitrogen to break the air to normal pressure, stop nitrogen, and use nitrogen to exhaust the nitriding furnace After the air in the furnace is removed, it is more conducive to the removal of the passivation film. After the air in the furnace is replaced by nitriding, the temperature of the furnace is raised to 350°C, and the temperature is controlled at 350°C to 400°C, and the film remover is added dropwise. Carry out depassivation film treatment 100min to above-mentioned sliding sheet, wherein the speed of dripping film removing agent is 60~1...

Embodiment 3

[0032] a) Degreasing and cleaning: Use alcohol to degrease and clean the 11Cr17 stainless steel slide to remove surface oil;

[0033] b) Depassivation film treatment: Put the above-mentioned degreased and cleaned 11Cr17 stainless steel slide into the nitriding furnace, vacuumize, then pass in nitrogen to break the air to normal pressure, stop nitrogen, and use nitrogen to exhaust the nitriding furnace After the air in the furnace, it is more beneficial to remove the passivation film. After replacing the air in the furnace with nitriding, the temperature of the furnace is raised to 400°C, and the temperature is controlled at 400°C to 450°C, and the film removal is started. depassivation film treatment on the slide for 30 minutes, wherein the speed of dropping the film remover is 50-80 drops / min, and the film remover is a citric acid methanol solution with a mass concentration of 30%. , to remove the passivation film on the surface of the slide;

[0034] c) Nitriding treatment:...

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Abstract

The invention relates to a gas nitriding treatment method of 11Cr17 stainless steel slip sheet, belonging to the technical field of stainless steel treatment. The invention aims at solving the problems of large erosion on the equipment and products and large environmental pollution of the nitriding method of 11Cr17 stainless steel slip sheet in the prior art. The method of the invention comprisesthe steps of: degreasing and cleaning the slip sheet, performing a passive film removal treatment at 300-450 DEG C to remove the passive film on the surface of the slip sheet; continuously filling ammonia, performing a first stage nitriding treatment at 450-530 DEG C, and performing a second stage nitriding treatment at 530-580 DEG C, and cooling to obtain a nitrided 11Cr17 stainless steel slip sheet. The method of the invention has the advantages of simple technique process, low production cost, small environmental pollution, small erosion on the nitriding equipment and capability of prolonging the service life of the equipment; besides, the obtained product has good quality performance and high erosion resistance.

Description

technical field [0001] The invention relates to a stainless steel slide, in particular to a gas nitriding treatment method for a 11Cr17 stainless steel slide, belonging to the technical field of stainless steel treatment. Background technique [0002] The air-conditioning compressor is an important part of the air-conditioning refrigeration system, and one of the most important components of the air-conditioning compressor is the sliding vane (or scraper). The sliding vane and the piston are in contact with each other and are easily worn. Therefore, properties such as good sliding properties, wear resistance, and corrosion resistance are required. Since traditional air conditioner compressors generally have the characteristics of non-frequency conversion, low power, and use of fluorine-containing refrigerants, the sliding vane can meet the design requirements of wear resistance and service life without surface treatment. The improvement of the air-conditioning ratio puts fo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C8/26C23C8/02
Inventor 魏成刚史红立张启斌史建伟
Owner 浙江百达精工股份有限公司
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