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Harmless salt bath nitrocarburizing technology

A technology of nitrocarburizing and salt bath nitriding, which is applied in the field of pollution-free salt bath nitrocarburizing technology, can solve the problems of low product market competitiveness, low production efficiency, uneven nitrocarburizing quality, etc. , to achieve the effect of eliminating repetitive processes, improving work efficiency and improving performance

Inactive Publication Date: 2016-06-29
CHONGQING XUXINYUE NC MACHINERY CO LTD
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Problems solved by technology

[0003] At present, the nitrocarburizing process is complicated and there is no unified standard, resulting in uneven quality of the produced nitrocarburizing. Many repeated processes also make the production efficiency low, increase the labor burden of workers, and make the market competitiveness of the product is not high.

Method used

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Embodiment Construction

[0014] The technical solution disclosed by the present invention is a pollution-free salt bath nitrocarburizing process, which is characterized in that it includes the following steps: 1) cleaning;

[0015] 2) Preheat the workpiece to 300-350°C;

[0016] 3) Salt bath nitriding: carry out salt bath nitriding at a temperature of 525-580°C, and keep warm for 70-180min;

[0017] 4) Oxidation: Oxidation is carried out at a temperature of 350-400 ° C, and the temperature is kept for 5-10 minutes;

[0018] 5) Polishing: light mechanical polishing, lapping or vibration finishing to obtain the required surface roughness;

[0019] 6) Secondary oxidation: carry out secondary oxidation at 350-400°C;

[0020] 7) cleaning;

[0021] 8) Dipping oil.

[0022] The invention has simple process, avoids many repetitive procedures, improves work efficiency, and can improve various aspects of performance of workpieces.

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Abstract

The invention discloses a harmless salt bath nitrocarburizing technology. The technology comprises 1, cleaning, 2, workpiece preheating to a temperature of 300-350 DEG C, 3, salt bath nitridation: carrying out salt bath nitridation at a temperature of 525-580 DEG C and carrying out thermal insulation for 70-180min, 4, oxidation: carrying out oxidation at a temperature of 350-400 DEG C and carrying out thermal insulation for 5-10min, 5, polishing: carrying out mild mechanical polishing, comminution or vibration finish machining to obtain desired surface roughness, 6, secondary oxidation: carrying out secondary oxidation at a temperature of 350-400 DEG C, 7, cleaning and 8, immersion in oil. The technology has simple processes, is free of many repeated processes, improves work efficiency and improves workpiece performances.

Description

technical field [0001] The invention relates to a pollution-free salt bath nitrocarburizing process. Background technique [0002] Carbonitriding is the process of infiltrating carbon and nitrogen into the surface of steel at the same time. Customarily, carbonitriding is also called cyanidation. At present, medium-temperature gas carbonitriding and low-temperature gas nitrocarburizing (that is, gas nitrocarburizing) are widely used. The main purpose of medium-temperature gas carbonitriding is to improve the hardness, wear resistance and fatigue strength of steel, while low-temperature gas carbonitriding is mainly nitriding, and its main purpose is to improve the wear resistance and seizure resistance of steel. [0003] At present, the nitrocarburizing process is complicated and there is no unified standard, resulting in uneven quality of the produced nitrocarburizing. Many repeated processes also make the production efficiency low, increase the labor burden of workers, and ...

Claims

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Application Information

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IPC IPC(8): C23C8/56
Inventor 银琦
Owner CHONGQING XUXINYUE NC MACHINERY CO LTD
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