CN116536618A - Novel carbonitriding process for bearing product - Google Patents
Novel carbonitriding process for bearing product Download PDFInfo
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- CN116536618A CN116536618A CN202310584093.6A CN202310584093A CN116536618A CN 116536618 A CN116536618 A CN 116536618A CN 202310584093 A CN202310584093 A CN 202310584093A CN 116536618 A CN116536618 A CN 116536618A
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- Prior art keywords
- carbonitriding
- new
- product
- bearing
- novel
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- 238000005256 carbonitriding Methods 0.000 title claims abstract description 45
- 238000000034 method Methods 0.000 title claims abstract description 42
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 claims abstract description 36
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims abstract description 30
- 238000004519 manufacturing process Methods 0.000 claims abstract description 19
- 229910021529 ammonia Inorganic materials 0.000 claims abstract description 15
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 9
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 9
- 238000010438 heat treatment Methods 0.000 claims abstract description 7
- 238000010791 quenching Methods 0.000 claims abstract description 6
- 230000000171 quenching effect Effects 0.000 claims abstract description 6
- ATUOYWHBWRKTHZ-UHFFFAOYSA-N Propane Chemical compound CCC ATUOYWHBWRKTHZ-UHFFFAOYSA-N 0.000 claims description 6
- 238000004320 controlled atmosphere Methods 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 3
- 239000001294 propane Substances 0.000 claims description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 abstract description 10
- 238000005255 carburizing Methods 0.000 abstract description 9
- 229910002092 carbon dioxide Inorganic materials 0.000 abstract description 5
- 239000001569 carbon dioxide Substances 0.000 abstract description 5
- 238000005121 nitriding Methods 0.000 abstract description 4
- 239000007789 gas Substances 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 230000007547 defect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000012159 carrier gas Substances 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C8/06—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases
- C23C8/28—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases more than one element being applied in one step
- C23C8/30—Carbo-nitriding
- C23C8/32—Carbo-nitriding of ferrous surfaces
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/18—Hardening; Quenching with or without subsequent tempering
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D6/00—Heat treatment of ferrous alloys
- C21D6/002—Heat treatment of ferrous alloys containing Cr
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/40—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for rings; for bearing races
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C8/02—Pretreatment of the material to be coated
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C8/80—After-treatment
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Solid-Phase Diffusion Into Metallic Material Surfaces (AREA)
- Rolling Contact Bearings (AREA)
Abstract
The invention discloses a new carbonitriding process for a bearing product in the technical field of bearings, which comprises the following steps: step one: feeding the parts into a travelling furnace, heating and homogenizing the temperature; step two: performing a new carbonitriding process on the product in the step one; step three: quenching the product in the second step; according to the novel carbonitriding process for the bearing product, the carbonitriding time is shortened and the carburizing and nitriding speeds are improved by using high carbon potential and high ammonia concentration in the carbonitriding stage of the product, so that the treatment time is shortened and the production efficiency is improved; and secondly, the dosage of carburizing gas methanol is reduced, the exhaust emission of carbon dioxide is reduced, and the green and efficient production process is realized.
Description
Technical Field
The invention belongs to the technical field of bearings, and particularly relates to a novel carbonitriding process for a bearing product.
Background
The bearing product is widely applied to various industries, gas carbonitriding quenching is a heat treatment method which is popular in recent years for improving the service life of the bearing, the technical process comprises furnace feeding, temperature rising, temperature equalizing, carbonitriding, quenching and furnace discharging, and the carbon potential in the carbonitriding stage is controlled to be 1.1-1.2%, and the ammonia concentration is controlled to be 3-5%.
The conventional GCr15 bearing gas carbonitriding process is carried out in a conventional carbon potential and low ammonia concentration atmosphere at present, has the defects of long treatment time and low production efficiency, and can not meet the requirements of modern markets.
Disclosure of Invention
Aiming at the situation, in order to overcome the defects of the prior art, the invention provides a novel carbonitriding process for a bearing product, and in order to solve the problems of long processing time and low production efficiency of a conventional GCr15 bearing, the invention uses high carbon potential and high ammonia concentration in the carbonitriding stage of the bearing product, improves the carburizing and nitriding speeds, reduces the processing time, improves the production efficiency, saves the dosage of carburizing gas methanol, and reduces the emission of carbon dioxide waste gas.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows: the invention provides a novel carbonitriding process for a bearing product, which comprises the following steps of:
step one: feeding the parts into a travelling furnace, heating and homogenizing the temperature;
step two: performing a new carbonitriding process on the product in the step one;
step three: and (3) quenching the product in the step two.
Further, the treatment temperature of the new process is 840+/-10 ℃ and the methanol flow is 3L/h.
Further, the carbonitriding atmosphere in the step (2) is methanol, propane and ammonia, and the carbon potential is controlled to be 1.5(+ -0.05%) of ammonia flow of 2M 3 And/h, the ammonia concentration is about 22%, and the carbonitriding time is 240+/-5 min.
Further, the production condition of the novel process is in a controlled atmosphere multipurpose furnace or a pre-vacuumized controlled atmosphere multipurpose furnace.
Further, the material of the bearing is GCr15.
The beneficial effects obtained by the method are as follows:
(1) According to the novel carbonitriding process for the bearing product, the high carbon potential and the high ammonia concentration are used in the carbonitriding stage of the product, so that the carbonitriding time is shortened, the carburizing and nitriding speeds are improved, the treatment time is shortened, and the production efficiency is improved;
(2) Secondly, the dosage of carburizing gas methanol is reduced, the exhaust emission of carbon dioxide is reduced, and the green production process is realized;
(3) Compared with the prior conventional process, the process reduces the co-permeation time by 1 hour, reduces the total treatment time by about 1 hour and improves the production efficiency by about 16 percent on the premise of ensuring the heat treatment effect of the bearing product.
Drawings
FIG. 1 is a schematic diagram of a novel carbonitriding process for preparing a bearing product in accordance with an embodiment of the present invention;
FIG. 2 is a schematic diagram of a conventional carbonitriding process in the prior art.
The accompanying drawings are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate the invention and together with the embodiments of the invention, serve to explain the invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention; all other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the examples of the present invention, unless specifically indicated, the raw materials or treatment techniques are all conventional commercially available raw materials or conventional treatment techniques in the art.
Examples
The invention provides a novel carbonitriding process for a bearing product, which comprises the following steps of:
step one: feeding the parts into a travelling furnace, heating and homogenizing the temperature;
step two: performing a new carbonitriding process on the product in the step one;
step three: and (3) quenching the product in the step two.
Wherein the treatment temperature of the new process is 840+/-10 ℃ and the flow rate of the methanol is 3L/h.
Wherein the carbonitriding atmosphere in the second step is methanol, propane and ammonia, the carbon potential is controlled to be 1.5+/-0.05%, and the ammonia flow is 2M 3 And/h, the ammonia concentration is about 22%, and the carbonitriding time is 240+/-5 min.
Wherein the production condition of the new process is a controlled atmosphere multipurpose furnace or a pre-vacuumized controlled atmosphere multipurpose furnace.
Wherein the material of the bearing is GCr15.
Performance testing
FIG. 1 is a schematic diagram of a novel carbonitriding process for preparing a bearing product according to an embodiment of the present invention, as shown in FIGS. 1 and 2; FIG. 2 is a schematic diagram of a conventional carbonitriding process in the prior art.
Compared with the existing conventional process, the novel carbonitriding process for preparing the bearing product has the advantages that the co-cementation time is reduced by 1 hour, the total treatment time is reduced by about 1 hour, and the production efficiency is improved by about 16 percent on the premise of ensuring the heat treatment effect of the bearing product.
The novel carbonitriding process for preparing the bearing product reduces the methanol consumption by 3L according to the accounting method of GB/T32151.5-2015 temperature gas emission accounting and reporting requirements:
1L methanol is used as carburizing carrier gas to generate CO 2 Emission = 1.00Kg, the process reduces carbon dioxide emission compared with the prior conventional technologyPut about 3 Kg/stove, i.e. 0.47Kg/h.
In summary, the novel carbonitriding process for the bearing product solves the problems of long processing time and low production efficiency of the conventional GCr15 bearing, and the carbonitriding time is shortened and the carburizing and nitriding speeds are improved by using high carbon potential and high ammonia concentration in the carbonitriding stage of the product, so that the processing time is shortened and the production efficiency is improved; and secondly, the dosage of carburizing gas methanol is reduced, the exhaust emission of carbon dioxide is reduced, and the green production process is realized.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
The invention and its embodiments have been described above with no limitation, and the invention is illustrated in the figures of the accompanying drawings as one of its embodiments, without limitation in practice. In summary, if one of ordinary skill in the art is informed by this disclosure, the preparation method and the embodiment similar to the technical scheme are not creatively designed without departing from the gist of the present invention, and all the preparation method and the embodiment are included in the protection scope of the present invention.
Claims (8)
1. A new process for carbonitriding a bearing product, said new process comprising the following treatment steps:
step one: feeding the parts into a travelling furnace, heating and homogenizing the temperature;
step two: performing a new carbonitriding process on the product in the step one;
step three: and (3) quenching the product in the step two.
2. The new carbonitriding process for bearing products according to claim 1, characterized in that: the treatment temperature of the new process is 840+/-10 ℃ and the flow rate of the methanol is 3L/h.
3. The new carbonitriding process for bearing products according to claim 2, characterized in that: the carbonitriding atmosphere in the step (2) is methanol, propane and ammonia.
4. A new process for carbonitriding a bearing product according to claim 3, characterized in that: the carbon potential in the step (2) is controlled to be 1.5+/-0.05%.
5. The new carbonitriding process for bearing products according to claim 4, wherein: the ammonia flow rate in the step (2) is 2M 3 And/h, ammonia concentration is about 22%.
6. The new carbonitriding process for bearing products according to claim 5, characterized in that: and (3) the carbonitriding time in the step (2) is 240+/-5 min.
7. The new carbonitriding process for bearing products according to claim 6, characterized in that: the production condition of the new process is a controlled atmosphere multipurpose furnace or a pre-vacuumizing controlled atmosphere multipurpose furnace.
8. The new carbonitriding process for bearing products according to claim 7, characterized in that: the material of the bearing is GCr15.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310584093.6A CN116536618A (en) | 2023-05-23 | 2023-05-23 | Novel carbonitriding process for bearing product |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310584093.6A CN116536618A (en) | 2023-05-23 | 2023-05-23 | Novel carbonitriding process for bearing product |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116536618A true CN116536618A (en) | 2023-08-04 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310584093.6A Pending CN116536618A (en) | 2023-05-23 | 2023-05-23 | Novel carbonitriding process for bearing product |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116536618A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106637060A (en) * | 2016-10-20 | 2017-05-10 | 洛阳Lyc轴承有限公司 | Carbonitriding heat treatment technique under new atmosphere |
| CN108277451A (en) * | 2018-01-23 | 2018-07-13 | 合肥康之恒机械科技有限公司 | A kind of GCr15 profile shafts hold Heat-Treatment of Steel technique |
| CN112301308A (en) * | 2020-11-03 | 2021-02-02 | 江苏丰东热处理及表面改性工程技术研究有限公司 | Carbonitriding heat treatment method and alloy part prepared by same |
-
2023
- 2023-05-23 CN CN202310584093.6A patent/CN116536618A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106637060A (en) * | 2016-10-20 | 2017-05-10 | 洛阳Lyc轴承有限公司 | Carbonitriding heat treatment technique under new atmosphere |
| CN108277451A (en) * | 2018-01-23 | 2018-07-13 | 合肥康之恒机械科技有限公司 | A kind of GCr15 profile shafts hold Heat-Treatment of Steel technique |
| CN112301308A (en) * | 2020-11-03 | 2021-02-02 | 江苏丰东热处理及表面改性工程技术研究有限公司 | Carbonitriding heat treatment method and alloy part prepared by same |
Non-Patent Citations (1)
| Title |
|---|
| 刘瑞良: "《表面热扩渗技术及其应用》", vol. 1, 哈尔滨工业大学出版社, pages: 38 * |
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