CN108277449B - Heat treatment method for carburizing and quenching low-carbon alloy steel workpiece - Google Patents
Heat treatment method for carburizing and quenching low-carbon alloy steel workpiece Download PDFInfo
- Publication number
- CN108277449B CN108277449B CN201810156289.4A CN201810156289A CN108277449B CN 108277449 B CN108277449 B CN 108277449B CN 201810156289 A CN201810156289 A CN 201810156289A CN 108277449 B CN108277449 B CN 108277449B
- Authority
- CN
- China
- Prior art keywords
- quenching
- workpiece
- carburizing
- temperature
- low
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000010791 quenching Methods 0.000 title claims abstract description 48
- 230000000171 quenching Effects 0.000 title claims abstract description 48
- 238000005255 carburizing Methods 0.000 title claims abstract description 40
- 238000010438 heat treatment Methods 0.000 title claims abstract description 22
- 229910001339 C alloy Inorganic materials 0.000 title claims abstract description 20
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 20
- 239000010959 steel Substances 0.000 title claims abstract description 20
- 238000000034 method Methods 0.000 claims abstract description 35
- OKTJSMMVPCPJKN-UHFFFAOYSA-N carbon Chemical compound data:image/svg+xml;base64,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 data:image/svg+xml;base64,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 [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 20
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 20
- 238000009792 diffusion process Methods 0.000 claims abstract description 16
- 238000005496 tempering Methods 0.000 claims abstract description 16
- 238000001816 cooling Methods 0.000 claims abstract description 9
- 238000004140 cleaning Methods 0.000 claims abstract description 5
- 238000007599 discharging Methods 0.000 claims abstract description 5
- 238000007514 turning Methods 0.000 claims abstract description 5
- OKKJLVBELUTLKV-UHFFFAOYSA-N methanol Chemical compound data:image/svg+xml;base64,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 data:image/svg+xml;base64,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 OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 claims description 22
- 238000002791 soaking Methods 0.000 claims description 16
- 239000007789 gas Substances 0.000 claims description 7
- 238000004321 preservation Methods 0.000 claims description 6
- IJGRMHOSHXDMSA-UHFFFAOYSA-N nitrogen Chemical compound data:image/svg+xml;base64,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 data:image/svg+xml;base64,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 N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 5
- 230000003472 neutralizing Effects 0.000 claims description 2
- 229910001873 dinitrogen Inorganic materials 0.000 claims 1
- 150000001247 metal acetylides Chemical class 0.000 abstract description 6
- 229910001566 austenite Inorganic materials 0.000 abstract description 4
- 230000002035 prolonged Effects 0.000 abstract description 2
- 238000003754 machining Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 241001391944 Commicarpus scandens Species 0.000 description 1
- 229910000677 High-carbon steel Inorganic materials 0.000 description 1
- 229910000954 Medium-carbon steel Inorganic materials 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000005262 decarbonization Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 239000003085 diluting agent Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005242 forging Methods 0.000 description 1
- 229910000529 magnetic ferrite Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910000734 martensite Inorganic materials 0.000 description 1
- 230000003334 potential Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 229910000859 α-Fe Inorganic materials 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
- C23C8/08—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 only one element being applied
- C23C8/20—Carburising
- C23C8/22—Carburising 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
- 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
- C23C8/04—Treatment of selected surface areas, e.g. using masks
-
- 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
Abstract
The invention discloses a heat treatment method for carburizing and quenching a low-carbon alloy steel workpiece, which comprises the following steps: (1) after the surface of the workpiece is cleaned, the surface of the non-working surface of the workpiece is subjected to anti-seepage treatment; (2) after heating to the temperature, preserving the heat for a period of time, and then performing carburization and diffusion treatment on the workpiece at the temperature; (3) then cooling and quenching for keeping; (4) directly discharging the part out of the furnace and air-cooling; (5) after turning a carbon layer and performing stress relief tempering, quenching the workpiece; (6) oil quenching the workpiece; (7) and finally, carrying out secondary low-temperature tempering. The process is characterized in that the workpiece processed and manufactured by the low-carbon alloy steel is subjected to surface carburization, so that the surface hardness of the workpiece is improved, the carbide of the product is reduced, and the service life of the product is prolonged. And the service performance of the product is improved by improving the carburizing and quenching process of the product. The invention overcomes the problem that the service life and the service performance of the product are influenced by excessive and overlarge carbides caused by the conventional heat treatment process, reduces the residual austenite on the surface of the product as much as possible on the premise of ensuring the performance of the product, and controls the deformation of the product.
Description
Technical Field
The invention relates to a heat treatment method of a low-carbon alloy steel workpiece, in particular to a heat treatment method for carburizing and quenching the low-carbon alloy steel workpiece.
Background
As is known, the inner gear ring is a key part in mechanical equipment, has the advantages of accurate transmission, compact structure, long service life and the like, and plays a key role in mechanical synchronization. This makes the precision requirement of internal ring gear extremely high, and the influence of the slight deviation of internal ring gear precision is huge to mechanical equipment.
In the case of a large-sized internal gear ring, the surface load is large during operation, so that the surface hardness is required to be high and the depth of a hardened layer is required to be deep. When the workpiece works, the toughness requirement of the core part is high, and the core part of the product also has enough strength. Therefore, low carbon alloy steel is generally used, because the hardenability is lower than that of high and medium carbon steel, but the surface hardness after quenching is not very high, the low carbon alloy steel is subjected to surface carburization and then quenching, so that the surface hardness is improved, and the core hardness can reach an ideal level. Therefore, the use strength of the surface is ensured, and the use toughness of the workpiece is also ensured. This is the current mainstream treatment for such internal gear rings.
The general technological process of the whole large-sized inner gear ring comprises forging, normalizing, rough machining, carburizing (anti-seepage), carburizing, high-temperature tempering, carbon layer turning, stress-relief tempering, quenching, low-temperature tempering, finish machining and the like. For a large internal gear ring, the precision requirement is extremely high, so that the difficulty of controlling the size of a product is great. In the processing technology, the heat treatment process has the greatest difficulty in controlling the service performance and the deformation size of the product.
The main processes of the current heat treatment are as follows: the low-carbon alloy steel is subjected to surface carburization, high-temperature tempering and carbon layer turning, stress-relief tempering and quenching. The product is discharged from the furnace at the carburizing stage at the temperature lower than 500 ℃, the strong carburizing potential is 1.2 +/-0.05%, and the diffusion carburizing potential is 0.8 +/-0.05%. And quenching at 820-.
The process has the following defects: 1. when the low-carbon alloy steel is discharged from a furnace at a temperature lower than 500 ℃ after carburization, a large amount of carbides are easily generated in the product, and the product is easy to break when working under the condition that a large amount of carbides exist in the product. 2. The higher carburized carbon potential also brings the risk of too coarse carbides. 3. The temperature during quenching and heat preservation is too low, so that the core hardness of the product is difficult to improve, the service life of the product is reduced, and the residual austenite on the surface of the product is improved, the surface hardness of the product is reduced, and the deformation of the product is increased.
Disclosure of Invention
The technical problem to be solved by the invention is to overcome the defects and shortcomings in the background technology and provide a heat treatment method for carburizing and quenching a low-carbon alloy steel workpiece.
In order to solve the technical problems, the technical scheme provided by the invention is as follows:
a heat treatment method for carburizing and quenching a low-carbon alloy steel workpiece comprises the following steps:
(1) after the surface of the workpiece is cleaned, the surface of the non-working surface of the workpiece is subjected to anti-seepage treatment; the surface of the non-working surface of the workpiece is subjected to anti-seepage treatment because the non-working surface does not need to have too high strength and needs to keep certain toughness.
(2) After heating to a set temperature, preserving heat for a period of time, and then performing carburization and diffusion treatment on the workpiece at the temperature; and (5) carburizing the surface of the product.
(3) Then cooling to the quenching temperature for heat preservation;
(4) directly discharging the workpiece out of the furnace and air-cooling; the reason for directly discharging the parts from the furnace for air cooling is that the temperature reduction in the furnace is slow, and a large amount of carbide is easily formed.
(5) Turning a carbon layer and performing stress relief tempering on the workpiece;
(6) quenching the workpiece;
(7) oil quenching the workpiece;
(8) and finally, carrying out secondary low-temperature tempering to fully eliminate the residual stress of the product.
And (3) neutralizing in the step (2), and introducing methanol and liquefied gas in the whole process. Methanol acts as a diluent in the carburizing process, and liquefied gas acts as a carburizing agent in the carburizing process.
In the above method, preferably, the carbon potential of the carburizing treatment is 1.0 ± 0.05%; the carbon potential of the diffusion treatment was 0.7 ± 0.05%. The carburization and diffusion carbon potentials are lower than the typical carbon potential of such processes in order to control product carbides.
In the above method, preferably, the carburizing and diffusing temperature is 920 ± 5 ℃. The product has coarse crystal grains due to overhigh temperature, and the mechanical property of the product is reduced; too low a temperature will reduce the carburization rate and increase the production cost.
In the above method, the holding time before the carburizing and diffusing treatment is preferably 40 ± 5 minutes; the time ratio of the carburizing and the diffusion treatment is 3: 2. The carbon concentration on the surface of the product is reduced due to too long diffusion time, the technical requirement cannot be met, the carbon element cannot be diffused due to too short diffusion time, and carbide is formed on the surface of the product, so the time ratio of carburizing and diffusion treatment is optimal to be 3: 2. The heat preservation time can be adjusted according to the size of the product, and the purpose is to ensure that the whole temperature of the product is uniform.
In the method, the quenching temperature is preferably 860 +/-5 ℃, and the quenching is kept for 60 +/-5 minutes. The temperature is determined according to materials, the temperature is too low, the product cannot be completely austenitized, the required hardness is difficult to achieve after quenching, and the mechanical properties of the product are influenced by the coarse crystal grains of the product when the temperature is too high. The holding time is determined according to the size of the product.
In the above method, preferably, in the step (2) and the step (3), the flow rate of methanol introduced is 3.5 ± 0.5L/h.
In the above method, preferably, in the step (6), in the quenching process, firstly, a first soaking process is adopted, the temperature is kept at 600 ± 5 ℃ for 60 ± 5 minutes, and a preheating effect is achieved, so that the workpiece is thoroughly heated at an austenitizing temperature; secondly, soaking at 820 +/-5 ℃ for 150 +/-5 minutes for the second time to austenitize the product; finally, soaking at 840 +/-5 ℃ for three times, and keeping the temperature for 5 +/-1 min, so that the surface quenching temperature of the product is increased, the core part is not heated, and the hardness of the core part of the product is controlled.
In the method, preferably, the soaking is carried out at 600 +/-5 ℃ in one time, and is protected by nitrogen; methanol and liquefied gas are introduced in the whole process in the processes of secondary soaking at 820 +/-5 ℃ and tertiary soaking at 840 +/-5 ℃, and the introduction flow rate of the methanol is 3.5 +/-0.5L/h; in the processes of secondary soaking at 820 +/-5 ℃ and tertiary soaking at 840 +/-5 ℃, the carbon potential is 0.7 +/-0.05 percent, and the product is prevented from decarbonization.
In the above method, preferably, in the step (7), the temperature of the quenching oil is 60 ± 5 ℃, and the holding time in the oil is 30 ± 5 min. The oil temperature is too high, the hardenability of the product is reduced, the core part is difficult to meet the technical requirements, and the oil temperature is too low, the cooling speed is too fast, so that the product has the risk of hardening cracks during quenching.
In the above method, preferably, in the step (8), the parameters of the secondary low-temperature tempering are respectively: the temperature is 190 plus or minus 5 ℃, and the time is 360 plus or minus 5 min; the temperature is 170 +/-5 ℃, and the time is 240 +/-5 min. And low-temperature tempering is carried out, so that the use hardness of the product is ensured, and the stress generated during quenching of the product is eliminated.
The process is characterized in that the workpiece processed and manufactured by the low-carbon alloy steel is subjected to surface carburization, so that the surface hardness of the workpiece is improved, the carbide of the product is reduced, and the service life of the product is prolonged. And the service performance of the product is improved by improving the carburizing and quenching process of the product. The invention overcomes the problem that the service life and the service performance of the product are influenced by excessive and overlarge carbides caused by the conventional heat treatment process, reduces the residual austenite on the surface of the product as much as possible on the premise of ensuring the performance of the product, and controls the deformation of the product.
Compared with the prior art, the invention has the advantages that:
1. the invention can effectively reduce the carbide of the product.
2. The invention reduces the deformation of the product as much as possible and ensures the performance requirement of the product by controlling the quenching temperature and the quenching heat preservation temperature.
3. The invention can effectively improve the service performance of the product and the service life of the product.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Figure 1 the first stage of the process of the present invention, the carburization process.
FIG. 2 is a second stage of the process of the present invention, the quenching process.
FIG. 3 is a photograph of the metallographic structure of the surface of a product treated by the process of the present invention. (surface texture without obvious carbide, magnification 200 times observation)
FIG. 4 is a photograph of the metallographic structure of the surface of a product treated by the process of the present invention. (surface texture without obvious carbide, 500 times magnification observation)
Detailed Description
In order to facilitate understanding of the invention, the invention will be described more fully and in detail with reference to the accompanying drawings and preferred embodiments, but the scope of the invention is not limited to the specific embodiments below.
Unless otherwise defined, all terms of art used hereinafter have the same meaning as commonly understood by one of ordinary skill in the art. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of the present invention.
Unless otherwise specifically stated, various raw materials, reagents, instruments, equipment and the like used in the present invention are commercially available or can be prepared by existing methods.
Example 1:
a large-sized internal gear ring produced by a certain company is carburized and quenched, the material is 18CrNiMo, after the large-sized internal gear ring is subjected to preliminary heat treatment and rough machining by the company, the surface of the large-sized internal gear ring is cleaned, and after the large-sized internal gear ring is cleaned, the surface of a non-working surface of the large-sized internal gear ring is subjected to anti-seepage treatment. And (3) carrying out a carburizing process, wherein the equipment is processed by a pit-type carburizing furnace as shown in figure 1, the carburizing temperature is 920 +/-5 ℃, and the temperature is kept for 40 minutes after the carburizing temperature is heated to the temperature, so that the integral temperature of the product is uniform. Then carburizing at 920 +/-5 ℃ for 1200 minutes, adjusting the carbon potential to 1.0 +/-0.05 percent, then performing diffusion treatment at the same temperature for 800 minutes (the time ratio of carburizing to diffusion is 3: 2), adjusting the carbon potential to 0.7 +/-0.05 percent, reducing the temperature to 860 ℃ after the carburizing and diffusion stage is finished, keeping the temperature for 60 minutes, and then directly discharging and air cooling at 860 ℃. In the carburizing and diffusing stage, methanol and liquefied gas are introduced in the whole course.
After the car carbon layer and the stress relief tempering are carried out in a client company, quenching treatment is carried out on the product, as shown in figure 2, the product is soaked at 600 +/-5 ℃ for 60 minutes, the temperature is protected by nitrogen at this stage, then soaked at 820 +/-5 ℃ for 150 minutes, finally soaked at 840 +/-5 ℃ for 5 minutes, methanol and liquefied gas are introduced into the two stages in the whole process, the carbon potential is 0.7 +/-0.05% in the processes of 820 +/-5 ℃ and 840 +/-5 ℃, the temperature of the quenching oil is 60 ℃, the quenching oil is kept for 30 minutes, and the product is stirred at a high speed in the oil. Finally, carrying out secondary low-temperature tempering at 190 ℃ for 360 min; the temperature is 170 ℃ and the time is 240 min.
The metallographic structure of the surface of the product treated by the process of the invention is shown in fig. 3 and 4.
The final detection result shows that the surface hardness is HRC61, the depth of a hardened layer is 2.55mm, the residual austenite martensite is grade 4, the core ferrite is grade 2, the carbide is grade 1, and the hot deformation of the product meets the requirements of customers.
Claims (7)
1. A heat treatment method for carburizing and quenching a low-carbon alloy steel workpiece is characterized by comprising the following steps:
(1) after the surface of the workpiece is cleaned, the surface of the non-working surface of the workpiece is subjected to anti-seepage treatment;
(2) after heating to a set temperature, preserving heat for a period of time, and then performing carburization and diffusion treatment on the workpiece at the temperature; the carbon potential of the carburization treatment is 1.0 +/-0.05%; the carbon potential of the diffusion treatment is 0.7 +/-0.05%; the heat preservation time before the carburizing and the diffusion treatment is 40 +/-5 minutes; the time ratio of the carburizing and the diffusion treatment is 3: 2;
(3) then cooling to the quenching temperature for heat preservation;
(4) directly discharging the workpiece out of the furnace and air-cooling;
(5) turning a carbon layer and performing stress relief tempering on the workpiece;
(6) quenching the workpiece; in the quenching treatment process, firstly soaking for 600 +/-5 ℃ for the first time, preserving heat for 60 +/-5 minutes, then soaking for 820 +/-5 ℃ for the second time, preserving heat for 150 +/-5 minutes, and finally soaking for 840 +/-5 ℃ for the third time, preserving heat for 5 +/-1 minutes;
(7) oil quenching the workpiece;
(8) finally, carrying out secondary low-temperature tempering;
and (3) neutralizing in the step (2), and introducing methanol and liquefied gas in the whole process.
2. The heat treatment process for carburizing and quenching a low carbon alloy steel workpiece according to claim 1, wherein in the step (2), the carburizing and diffusing temperature is 920 ± 5 ℃.
3. The heat treatment method for carburizing and quenching the low carbon alloy steel workpiece according to claim 1 or 2, wherein in the step (3), the quenching temperature is 860 ± 5 ℃, and the quenching is maintained for 60 ± 5 minutes.
4. The heat treatment method for carburizing and quenching the low-carbon alloy steel workpiece according to claim 1 or 2, wherein the flow rate of methanol introduced in the step (2) and the step (3) is 3.5 ± 0.5L/h.
5. The heat treatment method for carburizing and quenching the low-carbon alloy steel workpiece according to claim 1, characterized in that the workpiece is protected by nitrogen gas during one soaking at 600 ± 5 ℃; methanol and liquefied gas are introduced in the whole process in the processes of secondary soaking at 820 +/-5 ℃ and tertiary soaking at 840 +/-5 ℃, and the introduction flow rate of the methanol is 3.5 +/-0.5L/h; the carbon potential is 0.7 +/-0.05% in the processes of secondary soaking at 820 +/-5 ℃ and tertiary soaking at 840 +/-5 ℃.
6. The heat treatment method for carburizing and quenching the low carbon alloy steel workpiece according to claim 1 or 2, wherein in the step (7), the temperature of the quenching oil is 60 ± 5 ℃, and the holding time in the oil is 30 ± 5 min.
7. The heat treatment method for carburizing and quenching a low-carbon alloy steel workpiece according to claim 1 or 2, wherein in the step (8), the parameters of the secondary low-temperature tempering are respectively as follows: the temperature is 190 plus or minus 5 ℃, and the time is 360 plus or minus 5 min; the temperature is 170 +/-5 ℃, and the time is 240 +/-5 min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810156289.4A CN108277449B (en) | 2018-02-24 | 2018-02-24 | Heat treatment method for carburizing and quenching low-carbon alloy steel workpiece |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810156289.4A CN108277449B (en) | 2018-02-24 | 2018-02-24 | Heat treatment method for carburizing and quenching low-carbon alloy steel workpiece |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108277449A CN108277449A (en) | 2018-07-13 |
| CN108277449B true CN108277449B (en) | 2020-02-11 |
Family
ID=62808621
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810156289.4A Active CN108277449B (en) | 2018-02-24 | 2018-02-24 | Heat treatment method for carburizing and quenching low-carbon alloy steel workpiece |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108277449B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110387521A (en) * | 2019-06-20 | 2019-10-29 | 苏州佳世捷机械有限公司 | A kind of carburizing heat treatment method that metal skin hardness is modified |
| CN110184561A (en) * | 2019-07-05 | 2019-08-30 | 晋江鹏发机械有限公司 | A kind of carburizing heat treatment process of alloy steel casting |
| CN110408882B (en) * | 2019-08-26 | 2021-10-01 | 山东亨格尔智能科技有限公司 | Anti-carburizing treatment method |
| CN110938794B (en) * | 2019-12-24 | 2022-03-18 | 南京宇能机械有限公司 | Output gear carburizing process and device for wind power generation |
| CN111549314A (en) * | 2020-05-21 | 2020-08-18 | 湖南特科能热处理有限公司 | Carburizing process for low-carbon steel thin-wall part |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102776471A (en) * | 2012-07-10 | 2012-11-14 | 镇江中船设备有限公司 | Carburizing quenching technology for low-carbon alloy steel parts |
| CN104894506A (en) * | 2015-06-24 | 2015-09-09 | 南车戚墅堰机车车辆工艺研究所有限公司 | Automobile transmission gear heat treatment method |
| CN105238911A (en) * | 2015-11-16 | 2016-01-13 | 南车戚墅堰机车车辆工艺研究所有限公司 | Steel grain refining heat treatment method for heavy-load locomotive gear |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080145264A1 (en) * | 2006-12-19 | 2008-06-19 | The Timken Company | Mo-V-Ni high temperature steels, articles made therefrom and method of making |
-
2018
- 2018-02-24 CN CN201810156289.4A patent/CN108277449B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102776471A (en) * | 2012-07-10 | 2012-11-14 | 镇江中船设备有限公司 | Carburizing quenching technology for low-carbon alloy steel parts |
| CN104894506A (en) * | 2015-06-24 | 2015-09-09 | 南车戚墅堰机车车辆工艺研究所有限公司 | Automobile transmission gear heat treatment method |
| CN105238911A (en) * | 2015-11-16 | 2016-01-13 | 南车戚墅堰机车车辆工艺研究所有限公司 | Steel grain refining heat treatment method for heavy-load locomotive gear |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108277449A (en) | 2018-07-13 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108277449B (en) | Heat treatment method for carburizing and quenching low-carbon alloy steel workpiece | |
| RU2518840C2 (en) | Case-hardened steel element and method of its production | |
| JP5319866B2 (en) | Rolling member and manufacturing method thereof | |
| EP1454998B1 (en) | Vacuum carbo-nitriding method | |
| JP2005163173A (en) | Gear part and method of producing thereof | |
| JP4627776B2 (en) | High concentration carburizing / low strain quenching member and method of manufacturing the same | |
| JPWO2006118242A1 (en) | Steel member and heat treatment method thereof | |
| KR910003515B1 (en) | Case hardening method for steel parts | |
| JP5093410B2 (en) | High carbon chromium bearing steel and manufacturing method thereof | |
| KR100303166B1 (en) | Method for heat-treating a hollow cylindrical workpiece | |
| CN105002507A (en) | 17CrNiMo6 material gear machining process | |
| US6059898A (en) | Induction hardening of heat treated gear teeth | |
| CN110484858B (en) | Method for eliminating mixed crystal of gear steel | |
| JP2000204464A (en) | Surface treated gear, its production and producing device therefor | |
| JP2015531029A (en) | Method for heat treating steel components and steel components | |
| JP2013221199A (en) | Method for producing bearing ring of rolling bearing | |
| KR101738503B1 (en) | Method for heat treatment for reducing deformation of cold-work articles | |
| JPH06108226A (en) | Carburizing heat treatment of steel-made parts | |
| KR101185060B1 (en) | Ann's gear automatic transmission with heat treatment | |
| JPH0570925A (en) | Method for carbonitriding heat treatment of high strength gear small in strain | |
| JPH05140726A (en) | Manufacture of driving system machine parts having high fatigue strength | |
| JP2005113210A (en) | Heat treatment system | |
| JP2004300472A (en) | Nitriding steel component capable of obtaining high surface hardness and deep hardening depth by nitriding treatment in short time, and production method therefor | |
| KR102293648B1 (en) | Low Deformation Heat Treatment of Steel Parts | |
| CN112695269A (en) | Heat treatment process of 18Cr2Ni4WA workpiece |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |