CN1786252A - Metal chemical heat treatment nitrogen earbon oxygen multi-element copermeation method and its mitrogen carbon oxygen multielement copermeation agent formula - Google Patents
Metal chemical heat treatment nitrogen earbon oxygen multi-element copermeation method and its mitrogen carbon oxygen multielement copermeation agent formula Download PDFInfo
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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
The invention relates to a metal heat treatment technology, in particular to a multi-element co-permeation method and a multi-element co-permeation agent formula for metal heat treatment.
Background
Few new technological and new processes are available in the field of metal chemical heat treatment, and even if the new processes are occasionally available, the new processes are improved over the old processes, so that the new processes are not innovated. The existing metal chemical heat treatment method mainly comprises the following steps: 1. carburizing 2, nitriding 3, carbonitriding 4, and nitrocarburizing. These four methods all have their weaknesses: the carburizing and carbonitriding are both carried out in the austenite state, and the temperature reaches above 800 ℃, so the large deformation is the fatal weakness. In addition, since carbon is mainly used, the hardness that can be achieved is limited, and even if a certain hardness is achieved, brittleness is difficult to avoid. The nitriding and the S-N-C co-cementation are in a ferrite stateTreatment, avoiding deformation (micro-deformation), but due to the chemical species generated being mainly Fe2N, so that the hardness is reached, but the brittleness is not avoided. The four methods can improve the hardness of the metal surface, improve the abrasion resistance of the metal to a certain degree (the hardness is only one of the factors of the abrasion resistance of the metal), but have no effect on the corrosion resistance of the metal. How to solve the problems of the wear resistance and corrosion resistance of metals by one method while overcoming the disadvantages of the above four methods is a major problem in chemical heat treatment of metals.
Disclosure of Invention
The invention aims to provide a nitrogen-carbon-oxygen multi-element co-permeation method for metal chemical heat treatment and a nitrogen-carbon-oxygen multi-element co-permeation agent formula thereof.
According to the design scheme provided by the invention, the nitrogen-carbon-oxygen multicomponent co-cementation method by metal chemical heat treatment comprises the following steps: adding 30-40 parts of urea, 15-25 parts of sodium carbonate, 15-25 parts of potassium carbonate and 20-30 parts of sodium ferrate, 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 weight part) into a crucible, heating to 480-580 ℃, and enabling the mixture to be in a molten state to form a salt bath, wherein the following reactions occur:
a、
b、
c、
d、
e、
f、
the reaction is carried out at 480-580 ℃; according to specific conditions, the reaction time is between 0.5 and 8 hours;
after the reaction, the steel member to be treated is put into the salt bath to carry out the following co-cementation reaction:
the nitriding reaction is as follows:
the carburizing reaction is as follows:
the oxidation reaction is as follows:
then the
Finally, the
The reaction is carried out at 480-580 ℃; according to specific conditions, the reaction time is between 0.5 and 8 hours, and the unit is weight parts.
The formula of the nitrogen-carbon-oxygen multicomponent co-permeation agent used in the method is as follows: 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 weight part).
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 weight part).
The invention carries out nitrogen-carbon-oxygen multicomponent co-cementation on the metal under a unique process, overcomes the defects of the prior art, and solves the abrasion resistance and the corrosion resistance of the metal at one time.
Detailed description of the preferred embodiments
The formula of the nitrogen-carbon-oxygen multicomponent co-permeation agent comprises 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 weight parts).
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 isweight part).
The reaction process and principle of nitrogen-carbon-oxygen co-cementation are as follows:
adding 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 a crucible, or adding 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 weight part). And heating to 480-580 ℃ to enable the molten salt to be in a molten state, and forming a salt bath. The reaction process is as follows:
(A)
(II)
(III)
(IV)
(V)
(VI)
The reaction is carried out at 480-580 ℃; according to specific conditions, the reaction time is between 0.5 and 8 hours.
In the chemical formulas (three), (four), (five), (N), (C), (O) are elements necessary for nitriding, carburizing and nitriding. After the above reaction, the steel member to be treated is put into the above salt bath to perform the following co-cementation reaction.
The nitriding reaction is as follows: 1.
2、
3、
the carburizing reaction is as follows:
the oxidation reaction is as follows: 1.
2、
3、
the reaction is also carried out at 480-580 ℃; according to specific conditions, the reaction time is between 0.5 and 8 hours.
In addition to the necessity of containing N, C, O element, which is rich in activity, for nitrocarb-oxycarb-co-cementation of metals, it is also of great importance that the co-cementation is pollution-free. CNO in chemical equations (three), (five), (six)-And CN-In [ O]]The conversion under (1) is the key to reduce pollution.
The principle of nitrocarburizing and carbonoxymultielement co-infiltrating is as follows: the method comprises the steps of forming a salt bath at a high temperature of 480-580 ℃ by using active N, C, O elements contained in urea, sodium carbonate and potassium carbonate base salt, and simultaneously carrying out nitrogen-carbon-oxygen multi-component co-cementation treatment on a steel workpiece by using an oxidant (sodium ferrate) for 0.5-8 hours.
Claims (4)
1. The metal chemical heat treatment nitrogen-carbon-oxygen multicomponent co-cementation method is characterized by comprising the following steps:adding 30-40 parts of urea, 15-25 parts of sodium carbonate, 15-25 parts of potassium carbonate and 20-30 parts of sodium ferrate (unit is weight part) into a crucible, heating to 480-580 ℃, and enabling the mixture to be in a molten state to form a salt bath, wherein the following reactions occur:
a、
b、
c、
d、
e、
f、
the reaction is carried out at 480-580 ℃; according to specific conditions, the reaction time is between 0.5 and 8 hours;
after the reaction, the steel member to be treated is put into the salt bath to carry out the following co-cementation reaction:
the nitriding reaction is as follows:
the carburizing reaction is as follows:
the oxidation reaction is as follows:
then the
Finally, the
The reaction is carried out at 480-580 ℃; according to specific conditions, the reaction time is between 0.5 and 8 hours.
2. The method of metal chemical heat treatment nitrogen-carbon-oxygen multicomponent co-cementation of claim 1, wherein: 33-37 parts of urea, 18-22 parts of sodium carbonate, 18-22 parts of potassium carbonate and 23-27 parts of sodium ferrate, wherein the unit is weight part.
3. The nitrocarboxycarburat co-penetrating agent formulation for use in the nitrocarburat co-penetrating method of the metalchemical heat treatment of claim 1, wherein the formulation comprises: 30-40 parts of urea, 15-25 parts of sodium carbonate, 15-25 parts of potassium carbonate and 20-30 parts of sodium ferrate.
4. The nitrocarboxycarburat co-penetration agent formulation for use in the nitrocarburat co-penetration method of the metalchemical heat treatment according to claim 3, wherein the formulation comprises: 33-37 parts of urea, 18-22 parts of sodium carbonate, 18-22 parts of potassium carbonate and 23-27 parts of sodium ferrate.
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| CNB2005101229292A CN100425728C (en) | 2005-12-05 | 2005-12-05 | Metal chemical heat treatment nitrogen earbon oxygen multi-element copermeation method and its mitrogen carbon oxygen multielement copermeation agent formula |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100425737C (en) * | 2006-08-24 | 2008-10-15 | 李亚明 | Chemical heat treatment method for steel products surface |
| CN102198591A (en) * | 2010-03-26 | 2011-09-28 | 东亚大学校产学协力团 | Manufacturing method of head rest support with high strength and light weight |
| RU2462517C2 (en) * | 2010-11-10 | 2012-09-27 | Государственное образовательное учреждение высшего профессионального образования Самарский государственный технический университет | Method of treatment of steel parts surfaces |
| CN110480272A (en) * | 2019-08-23 | 2019-11-22 | 武汉轻工大学 | Automobile wheel hub bolt processing method and automobile wheel hub bolt |
| CN111020465A (en) * | 2019-12-23 | 2020-04-17 | 成都赛飞斯金属科技有限公司 | Surface treating agent for low-temperature salt bath nitrogen-carbon-oxygen co-cementation technology and using method |
| CN111500975A (en) * | 2020-05-29 | 2020-08-07 | 江苏奕华新材料科技有限公司 | Surface treatment method for oil storage cylinder of shock absorber |
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| CN102409285A (en) * | 2011-11-25 | 2012-04-11 | 江苏海纳机电集团有限公司 | Low-temperature salt bath hardening treatment method for austenitic stainless steel |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2777910B1 (en) * | 1998-04-27 | 2000-08-25 | Air Liquide | METHOD FOR REGULATING THE CARBON POTENTIAL OF A HEAT TREATMENT ATMOSPHERE AND METHOD FOR HEAT TREATMENT IMPLEMENTING SUCH REGULATION |
| US6458218B1 (en) * | 2001-01-16 | 2002-10-01 | Linamar Corporation | Deposition and thermal diffusion of borides and carbides of refractory metals |
| JP2005126752A (en) * | 2003-10-22 | 2005-05-19 | Nippon Parkerizing Co Ltd | Automobile under carriage member with surface hardness and high corrosion resistance imparted |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100425737C (en) * | 2006-08-24 | 2008-10-15 | 李亚明 | Chemical heat treatment method for steel products surface |
| CN102198591A (en) * | 2010-03-26 | 2011-09-28 | 东亚大学校产学协力团 | Manufacturing method of head rest support with high strength and light weight |
| RU2462517C2 (en) * | 2010-11-10 | 2012-09-27 | Государственное образовательное учреждение высшего профессионального образования Самарский государственный технический университет | Method of treatment of steel parts surfaces |
| CN110480272A (en) * | 2019-08-23 | 2019-11-22 | 武汉轻工大学 | Automobile wheel hub bolt processing method and automobile wheel hub bolt |
| CN111020465A (en) * | 2019-12-23 | 2020-04-17 | 成都赛飞斯金属科技有限公司 | Surface treating agent for low-temperature salt bath nitrogen-carbon-oxygen co-cementation technology and using method |
| CN111500975A (en) * | 2020-05-29 | 2020-08-07 | 江苏奕华新材料科技有限公司 | Surface treatment method for oil storage cylinder of shock absorber |
| CN111500975B (en) * | 2020-05-29 | 2023-11-17 | 江苏奕华新材料科技有限公司 | Surface treatment method for oil storage cylinder of shock absorber |
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