Metal chemical heat treatment nitrogen earbon oxygen multi-element copermeation method and its mitrogen carbon oxygen multielement copermeation agent formula

A technology of chemical heat treatment and multi-component co-infiltration, which is applied in the direction of metal material coating process, coating, solid-state diffusion coating, etc., can solve the problems of unavoidable brittleness, ineffective metal corrosion resistance, limited hardness, etc.

Inactive Publication Date: 2008-10-15
王锡良
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

These four methods have their weaknesses: (1) Carburizing and carbonitriding are both processed in the austenitic state, and the temperature reaches above 800 ° C, so the large amount of deformation is its fatal weakness
In addition, since carbon is the main element, the hardness it can achieve is limited. Even if it reaches a certain hardness, it is difficult to avoid brittleness.
(2) Both nitriding and sulfur nitrogen carburizing are processed in the ferrite state, avoiding deformation (micro deformation), but because the chemical substance produced is mainly Fe 2 N, so although the hardness has been achieved, it still cannot avoid its brittleness
(3) The above four methods can increase the hardness of the metal surface, and to some extent improve the wear resistance of the metal (hardness is only one of the factors of metal resistance to wear), but they have no effect on the corrosion resistance of the metal. effect

Method used

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Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0025] specific implementation plan

[0026] The formula of the nitrogen, carbon and oxygen multiple co-infiltration agent is 30-40 parts of urea, 15-25 parts of sodium carbonate, 15-25 parts of potassium carbonate, and 20-30 parts of sodium ferrate (the unit is parts by weight).

[0027] Or 33-37 parts of urea, 18-22 parts of sodium carbonate, 18-22 parts of potassium carbonate, and 23-27 parts of sodium ferrate (the unit is parts by weight).

[0028] The reaction process and principle of nitrocarburizing are as follows:

[0029] Add 30-40 parts of urea, 15-25 parts of sodium carbonate, 15-25 parts of potassium carbonate, and 20-30 parts of sodium ferrate into the crucible, or add 33-37 parts of urea, 18-22 parts of sodium carbonate, and 18 parts of potassium carbonate. ~22 parts, 23~27 parts of sodium ferrate, (unit is part by weight). Raise the temperature to 480-580°C to make it in a molten state and form a salt bath. The reaction process is as follows:

[0030] (1) 2(...

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Abstract

The invention relates to metallochemistry heat treatment nitrogen carbon oxygen multi-element together leaking method and its multi-element together leaking agent formula. It belongs to metallochemistry heat treatment technique, concretely multi-element together leaking agent formula. Its contents (part by weight) are carbamide 30-40, sodium carbonate 15-25, potassium carbonate 15- 25, sodium ferrate 20-30, or they are respectively 33-37, 18-22, 18-22, 23-27. This is a new chemical heat treatment method--nitrogen carbon oxygen multi-element together leaking salt bath radical salt formula. It preparation is low cost, no pollution, especially fit for large-scale popularizing. The treated steel workpiece can greatly improve its hardness, wear and corrosion resistance.

Description

technical field [0001] The invention relates to metal heat treatment technology, in particular to a multi-component co-infiltration method and a multi-component co-infiltration agent formula for metal heat treatment. Background technique [0002] At present, there are few new technologies and new processes in the field of metal chemical heat treatment. Even if they appear occasionally, they are just improvements to old processes, not innovations. The existing metal chemical heat treatment methods mainly include: 1. Carburizing, 2. Nitriding, 3. Carbonitriding and 4. Sulfur and nitrogen carburizing. These four methods have their weaknesses: (1) Carburizing and carbonitriding are all processed in the austenitic state, and the temperature reaches above 800°C, so the large amount of deformation is its fatal weakness. In addition, since carbon is the main element, the hardness it can achieve is limited, and even if it reaches a certain hardness, it is difficult to avoid brittlen...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C8/52
Inventor 王锡良
Owner 王锡良
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