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Salt bath nitrogenization heat treatment method for metal surface

A heat treatment method, salt bath nitriding technology, applied in metal material coating process, coating, solid-state diffusion coating, etc., can solve the problems of long time, unstable deformation of the seepage layer, large deformation, etc., and achieve short time, The effect of small deformation and small deformability

Inactive Publication Date: 2008-03-19
孙国飞
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  • Claims
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AI Technical Summary

Problems solved by technology

The above-mentioned processes generally have defects such as long time, large deformation, and unstable deformation of the seepage layer.

Method used

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Embodiment Construction

[0014] Below in conjunction with embodiment the present invention is described further, but not limited to following embodiment, can according to the performance requirement of different metal parts and use occasion, select the different process conditions in following embodiment during actual application, but all do not use Any form limits the scope of the invention.

[0015] 1. Arrange and gradually clean metal parts, remove oil, rust, etc., so that the surface of metal parts is clean and free of oil stains;

[0016] 2. Clamping: Select the fixture reasonably according to the shape and size of the metal parts, hoist them in the basket and arrange the metal parts;

[0017] 3. Clean the material basket containing the metal parts again, and degrease in the degreasing tank for 30-60 minutes, the water temperature is 40-80°C, and the air flow is started to make the water move;

[0018] 4. After degreasing, wash in the clear water tank, fully wash off the residue in the degreasin...

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Abstract

The present invention relates to a metal surface salt bath nitride nitriding heat treatment method which belongs to the metal part surface heat treatment technology field. The method is performed in the following technical process: first, loading and clamping: the metal part is hung and arranged in a charging basket; second, nitriding: the metal part hung and arranged in the charging basket is positioned in a nitriding furnace, heated and charged with nitriding salt for salt bath and nitriding, and heat is preserved for 30-80 minutes in the condition that the temperature is 540-570 DEG C; third, cleaning: the nitrided metal part is cleaned, and the water temperature is controlled at 60-80 DEG C; the nitriding salt in the nitriding working process comprises carbamide, potassium chloride or barium chloride, sodium carbonate, and K 2 S, etc., according to the weight percentage, the composition of each component is respectively: 30-40 percent of carbamide, 20-28 percent of potassium chloride or barium chloride, 38-44 percent of sodium carbonate, and 0.0001-0.1 percent of K 2 S, and the sum of the weight percentage of each component is 100 percent. The present invention has the advantages of smaller deformability, short time, high efficiency, and wide application range; and also can achieve the effect of reducing the cost obviously.

Description

technical field [0001] The invention relates to a metal surface salt bath nitriding heat treatment method, which belongs to the technical field of metal parts surface heat treatment. Background technique [0002] In recent years, with the rapid development of heat treatment technology, the requirements for the surface of various metal parts are getting higher and higher. For any metal parts, fatigue resistance, wear resistance, high strength and beautiful appearance are the basic requirements for the surface of metal parts. The surface of existing metal parts The main heat treatment is gas nitriding, and its process is as follows: 1. Cleaning: cleaning dirt and oil stains on the surface of the parts; 2. Clamping: select the corresponding fixture according to the size and shape of the parts; , select the corresponding temperature and time for nitriding; 4. Oil cooling: After nitriding, use oil to cool. The above-mentioned processes generally have defects such as long time, l...

Claims

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Application Information

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IPC IPC(8): C23C8/48C23C8/10C23C8/02
Inventor 孙国飞李保明
Owner 孙国飞
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