CN114346625A - Heavy-load large-seepage-layer gear and preparation method and application thereof - Google Patents
Heavy-load large-seepage-layer gear and preparation method and application thereof Download PDFInfo
- Publication number
- CN114346625A CN114346625A CN202111486797.7A CN202111486797A CN114346625A CN 114346625 A CN114346625 A CN 114346625A CN 202111486797 A CN202111486797 A CN 202111486797A CN 114346625 A CN114346625 A CN 114346625A
- Authority
- CN
- China
- Prior art keywords
- gear
- temperature
- heavy
- layer
- tempering
- 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.)
- Pending
Links
- 238000002360 preparation method Methods 0.000 title claims abstract description 8
- 238000010438 heat treatment Methods 0.000 claims abstract description 46
- 239000010410 layer Substances 0.000 claims abstract description 36
- 238000000034 method Methods 0.000 claims abstract description 36
- 238000005496 tempering Methods 0.000 claims abstract description 35
- 238000011282 treatment Methods 0.000 claims abstract description 30
- 238000005255 carburizing Methods 0.000 claims abstract description 27
- 239000002344 surface layer Substances 0.000 claims abstract description 27
- 230000006698 induction Effects 0.000 claims abstract description 21
- 238000001816 cooling Methods 0.000 claims abstract description 20
- 238000010791 quenching Methods 0.000 claims abstract description 19
- 230000000171 quenching effect Effects 0.000 claims abstract description 19
- 238000005242 forging Methods 0.000 claims abstract description 13
- 238000004519 manufacturing process Methods 0.000 claims abstract description 13
- 239000000463 material Substances 0.000 claims description 9
- 238000005422 blasting Methods 0.000 claims description 8
- 238000012545 processing Methods 0.000 claims description 8
- 238000000137 annealing Methods 0.000 claims description 4
- 238000003672 processing method Methods 0.000 claims description 2
- 229910001566 austenite Inorganic materials 0.000 abstract description 29
- 239000003245 coal Substances 0.000 abstract description 15
- 238000005065 mining Methods 0.000 abstract description 10
- 229910000831 Steel Inorganic materials 0.000 abstract description 6
- 239000010959 steel Substances 0.000 abstract description 6
- 238000003780 insertion Methods 0.000 abstract description 4
- 230000037431 insertion Effects 0.000 abstract description 4
- 238000005265 energy consumption Methods 0.000 abstract description 2
- 239000007769 metal material Substances 0.000 abstract description 2
- 229910052804 chromium Inorganic materials 0.000 abstract 1
- 229910052748 manganese Inorganic materials 0.000 abstract 1
- 229910052759 nickel Inorganic materials 0.000 abstract 1
- 229910052721 tungsten Inorganic materials 0.000 abstract 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 11
- 229910052799 carbon Inorganic materials 0.000 description 11
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 8
- 238000003754 machining Methods 0.000 description 6
- 239000002994 raw material Substances 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 5
- 229910000734 martensite Inorganic materials 0.000 description 5
- 238000005299 abrasion Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- 239000011159 matrix material Substances 0.000 description 4
- 229910052757 nitrogen Inorganic materials 0.000 description 4
- 238000004321 preservation Methods 0.000 description 4
- 239000013078 crystal Substances 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 150000001247 metal acetylides Chemical class 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
Landscapes
- Heat Treatment Of Articles (AREA)
Abstract
The invention belongs to the field of metal materials, and particularly relates to a heavy-load large-penetration-layer gear and a preparation method and application thereof. The gear steel billet contains C: 0.13 to 0.19%, Si: 0.17 to 0.37%, Mn: 0.30-0.60%, Cr: 1.35-1.65%, Ni: 4.00-4.50%, W: 0.80-1.20%, P less than 0.001%, S less than 0.001%, and the balance Fe. The heavy-duty large-carburized layer gear is prepared through a series of treatments such as forging, carburizing, cooling, heating of the inner surface layer, spline insertion, quenching, cryogenic treatment, low-temperature tempering and the like. The method is characterized in that the prepared gear solves the problems of high energy consumption and low efficiency in the production process of the heavy-load large-carburized layer gear for the existing coal mining machine, the existing high-temperature tempering process after carburization is cancelled, and the inner surface layer is singly heated by adopting an induction coil instead of the integral heating of high-temperature tempering so as to soften the inner surface layer tissue. The temperature of the cryogenic treatment is accurately selected according to the components of the carburized layer, the content of residual austenite in the carburized layer is controlled, and the comprehensive performance of the gear is improved.
Description
Technical Field
The invention belongs to the field of metal materials, and particularly relates to a heavy-load large-penetration-layer gear and a preparation method and application thereof.
Background
The proportion of the current coal power accounts for about half of the total power generation amount, and the green production of the coal power industry is particularly important. The coal mining industry, as a related industry of coal and electricity, can make an important contribution to the carbon reduction of the coal and electricity. In the coal mining operation process, a gear which is one of key parts is impacted by heavy load, and particles such as coal particles, dust and the like fall on the surface of the gear due to severe working environment, so that abrasive wear is formed, and the service condition of the gear is further deteriorated. Therefore, the carbon content of the surface of the gear is increased by carburizing treatment, so that multi-scale carbide is formed, and the wear resistance of the gear is improved.
In order to meet the service requirement, the thickness of a carburized layer of the heavy-duty gear for the coal mining machine at least needs to exceed 2.5mm, even reaches 5 mm. The 18Cr2Ni4W steel is generally adopted to prepare a large-penetration-layer gear, and the common production method comprises the following steps: carburizing → high-temperature tempering → quenching → cryogenic treatment → low-temperature tempering. The whole production process consumes long time, consumes large power and has low efficiency. An innovative process is urgently needed, and the greenization and the high efficiency of the production process of the heavy-load large-permeability-layer gear for the coal mining machine are realized.
In order to solve the problem of overlong production time of the carburized gear, such as CN113430461A and CN113234998A, the prior patents propose a method for increasing the carburizing temperature from the viewpoint of carburizing kinetics, and the carburizing temperature is increased to be more than 960 ℃. The problem of austenite grain coarsening can be brought by the increase of the carburizing temperature, and in order to solve the problem, certain amount of microalloy elements such as Nb, V, Ti and the like are added while changing the components of the gear correspondingly, thereby increasing the consumption of alloy resources. In addition, the increase in carburizing temperature requires the carburizing furnace to withstand higher temperatures for a long time, which substantially increases the cost for purchasing a new carburizing furnace.
The ideal structure of the carburized layer of the heavy-duty gear for the coal mining machine is a fine twin crystal martensite matrix and uniformly distributed carbides, and the content of residual austenite is lower than 10 percent. In the existing process, carburizing is carried out at 915-945 ℃ for 175-232h, so that the carbon content on the surface of the gear is increased to at least 0.8%, the matrix structure of the surface layer is changed into twin crystal martensite with high hardness, and multi-scale carbide is generated in the structure, so that the wear resistance of the gear is improved. But because the carbon content is increased, the stability of austenite is improved, so the austenite content of the carburized gear surface layer is higher and can exceed 30 percent, even reach 50 percent. The strength of austenite is low, which is not beneficial to improving the wear resistance. Therefore, a high-temperature tempering process is adopted after carburization, the temperature is generally kept at 645-675 ℃ for 6-9 hours, and sometimes two times of high-temperature tempering are carried out. The purpose of high temperature tempering is to precipitate carbides from austenite in the carburized layer, to lower the stability of austenite, and to reduce the austenite content in the carburized layer to 10% or less. The purpose of quenching is to refine the structure and regulate the carbide distribution, and the temperature is generally kept at 775-850 ℃ for 3-5 h. The subzero treatment is generally cold treatment for 2-3h at-80 to-70 ℃ so as to further control or reduce the content of residual austenite on the surface layer of the gear. The principle is that the stability of austenite is related to temperature, the temperature is reduced, and the stability of austenite is weakened. The low-temperature tempering is to temper for 6-8 hours at 160-250 ℃ so as to reduce stress and improve the comprehensive performance of the gear.
The purpose of analyzing the existing production links of the heavy-duty gear for the coal mining machine is known that the effects of high-temperature tempering and cryogenic treatment are the same and are both used for reducing the content of residual austenite. Thus, the energy-consuming, time-consuming high-temperature tempering process can be eliminated. However, the method is not eliminated in the prior art because after carburization and before quenching, splines need to be inserted into the inner surface of the gear, namely, an inner gear ring is manufactured and used for assembling the gear in a coal mining machine. In order to complete spline insertion smoothly, the hardness of the inner surface of the gear needs to be lower than 40 HRC. Therefore, in the prior art, the purpose of high-temperature tempering is to reduce the hardness of the inner surface layer of the gear rather than regulating the content of residual austenite. Therefore, if a heavy-duty large-carburized layer gear for a short-flow green production coal mining machine is required, the problem of high hardness of the carburized inner surface layer is solved while the energy-consuming and time-consuming high-temperature tempering process is cancelled.
Disclosure of Invention
In order to solve the problems of high energy consumption and low efficiency in the production process of the heavy-load large-permeability-layer gear for the conventional coal mining machine, the invention adopts a preparation method of the heavy-load large-permeability-layer gear, which comprises the following steps:
(1) processing the smelted 18Cr2Ni4W material into gear blank;
(2) carburizing the gear blank, and cooling to obtain a carburized gear;
(3) heating the inner surface layer of the carburized gear to 660-720 ℃, and inserting a spline to obtain a semi-finished gear;
(4) and sequentially carrying out quenching, deep cooling treatment, low-temperature tempering and shot blasting treatment on the semi-finished gear to obtain the heavy-load large-permeability gear.
Preferably, in the step (1), the processing method comprises forging, normalizing, tempering, size processing and annealing in sequence; the forging ratio of the forging is greater than 3.
Preferably, the normalizing temperature is 940-; the tempering temperature is 650-690 ℃, and the time is 3-8 h; the annealing temperature is 200-400 ℃, and the time is 3-5 h.
Preferably, in the step (2), the temperature for carburizing is 915-945 ℃ and the time is 175-232 h. The carbon content of the carburized layer reaches 0.8 percent. After carburization, the steel is slowly cooled to about 850 ℃, and then air-cooled to room temperature.
Preferably, in the step (3), the heating depth is 5-15 mm.
Further, in the step (3), the heating mode is induction coil heating.
Further, in the step (4), the quenching temperature is 775-.
Further, in the step (4), the temperature of the deep cooling treatment is-120 to-80 ℃, and the time is 2 to 3 hours.
Further, in the step (4), the temperature of the low-temperature tempering is 160-250 ℃, and the time is 6-8 h.
The invention also provides a heavy-load large-penetration-layer gear.
Compared with the prior art, the technical scheme of the invention has the following advantages:
(1) the temperature of the cold treatment is determined by the composition of the gear, with the aim of reducing the austenite content of the carburized layer to less than 10%, and to more than 5%. Therefore, the austenite is not completely eliminated, and a small amount of 5-10% austenite is retained in the carburized layer, so that the toughness of the carburized layer is improved, and the service life of the gear is prolonged.
(2) The existing high-temperature tempering process after carburization is cancelled, and in order to compensate for the effect of reducing the hardness of the inner surface layer, the inner surface layer is independently heated by adopting an induction coil instead of the integral heating of high-temperature tempering so as to soften the structure of the inner surface layer and facilitate spline insertion.
(3) In order to control the content of the residual austenite in the carburized layer, the temperature of the cryogenic treatment is accurately selected according to the composition of the carburized layer.
Detailed Description
The present invention is further described below in conjunction with specific examples to enable those skilled in the art to better understand the present invention and to practice it, but the examples are not intended to limit the present invention.
Example 1
An 18Cr2Ni4W material is smelted by electroslag remelting, and then forging, mechanical rough machining and pre-heat treatment are carried out to prepare raw materials for carburizing. Followed by a standard carburization process. The carburizing temperature is 930 ℃, and the time is 6 hours, so that the thickness of the carburized layer reaches 3.2mm, and the carbon content is about 0.8 percent. After carburization, slowly cooling to 850 ℃, and then air cooling to room temperature. The hardness of the inner surface of the gear was 48HRC as shown in Table 1. Then carrying out induction heating treatment, wherein the maximum heating temperature is 660 ℃, and heating and then slowly cooling to room temperature. The hardness and austenite content of the inner surface layer of the gear were 39HRC and 22%, respectively, as shown in table 1.
After induction heating, inserting the spline. The whole spline arranging process is normal, and the situations of immovable arrangement and increased cutter abrasion do not occur. And (3) carrying out a quenching process after inserting the spline, wherein the austenitizing temperature is 800 ℃, and carrying out oil quenching to room temperature after heat preservation for 3 hours. Then, liquid nitrogen is adopted to carry out a cryogenic process, the temperature is-90 ℃, and the processing time is 2 hours. And finally, tempering the gear at low temperature. Tempering at 180 ℃ for 6h, taking out of the furnace, air-cooling to room temperature, and performing shot blasting treatment to obtain a finished product. And detecting whether the performance of the finished gear meets the standard requirement or not to obtain the heavy-load large-penetration-layer gear.
Example 2
An 18Cr2Ni4W material is smelted by electroslag remelting, and then forging, mechanical rough machining and pre-heat treatment are carried out to prepare raw materials for carburizing. Followed by a standard carburization process. The carburizing temperature is 930 ℃, and the time is 6 hours, so that the thickness of the carburized layer reaches 3.2mm, and the carbon content is about 0.8 percent. After carburization, slowly cooling to 850 ℃, and then air cooling to room temperature. The hardness of the inner surface of the gear was 48HRC as shown in Table 2. Then, induction heating treatment is carried out, the maximum heating temperature is 720 ℃, and the temperature is slowly cooled to the room temperature after heating. The hardness and austenite content of the inner surface layer of the gear were 36HRC and 30%, respectively, as shown in table 2.
After induction heating, inserting the spline. The whole spline arranging process is normal, and the situations of immovable arrangement and increased cutter abrasion do not occur. And (3) carrying out a quenching process after inserting the spline, wherein the austenitizing temperature is 800 ℃, and carrying out oil quenching to room temperature after heat preservation for 3 hours. Then, liquid nitrogen is adopted to carry out a cryogenic process, the temperature is-90 ℃, and the processing time is 2 hours. And finally, tempering the gear at low temperature. Tempering at 180 ℃ for 6h, taking out of the furnace, air-cooling to room temperature, and performing shot blasting treatment to obtain a finished product. And detecting whether the performance of the finished gear meets the standard requirement or not to obtain the heavy-load large-penetration-layer gear.
Example 3
An 18Cr2Ni4W material is smelted by electroslag remelting, and then forging, mechanical rough machining and pre-heat treatment are carried out to prepare raw materials for carburizing. Followed by a standard carburization process. The carburizing temperature is 930 ℃, the time is 10 hours, the thickness of the carburized layer reaches 5.2mm, and the carbon content is about 0.85 percent. After carburization, the steel is slowly cooled to 845 ℃, and then air-cooled to room temperature. The hardness of the inner surface of the gear was 49HRC as shown in Table 4. Then carrying out induction heating treatment, wherein the maximum heating temperature is 670 ℃, and heating and then slowly cooling to room temperature. The hardness and austenite content of the inner surface layer of the gear were 38HRC and 24%, respectively, as shown in table 4.
After induction heating, inserting the spline. The whole spline arranging process is normal, and the situations of immovable arrangement and increased cutter abrasion do not occur. And (3) carrying out a quenching process after inserting the spline, wherein the austenitizing temperature is 800 ℃, and carrying out oil quenching to room temperature after heat preservation for 3 hours. Then, liquid nitrogen is adopted to carry out a cryogenic process, the temperature is-95 ℃, and the processing time is 2 hours. And finally, tempering the gear at low temperature. Tempering at 180 ℃ for 6h, taking out of the furnace, air-cooling to room temperature, and performing shot blasting treatment to obtain a finished product. And detecting whether the performance of the finished gear meets the standard requirement or not to obtain the heavy-load large-penetration-layer gear.
Example 4
An 18Cr2Ni4W material is smelted by electroslag remelting, and then forging, mechanical rough machining and pre-heat treatment are carried out to prepare raw materials for carburizing. Followed by a standard carburization process. The carburizing temperature is 930 ℃, the time is 10 hours, the thickness of the carburized layer reaches 5.2mm, and the carbon content is about 0.85 percent. After carburization, the steel is slowly cooled to 845 ℃, and then air-cooled to room temperature. The hardness of the inner surface of the gear was 49HRC as shown in Table 4. Then carrying out induction heating treatment, wherein the maximum heating temperature is 700 ℃, and heating and then slowly cooling to room temperature. The hardness and austenite content of the inner surface layer of the gear were 37HRC and 24%, respectively, as shown in table 4.
After induction heating, inserting the spline. The whole spline arranging process is normal, and the situations of immovable arrangement and increased cutter abrasion do not occur. And (3) carrying out a quenching process after inserting the spline, wherein the austenitizing temperature is 800 ℃, and carrying out oil quenching to room temperature after heat preservation for 3 hours. Then, liquid nitrogen is adopted to carry out a cryogenic process, the temperature is-110 ℃, and the processing time is 2 hours. And finally, tempering the gear at low temperature. Tempering at 180 ℃ for 6h, taking out of the furnace, air-cooling to room temperature, and performing shot blasting treatment to obtain a finished product. And detecting whether the performance of the finished gear meets the standard requirement or not to obtain the heavy-load large-penetration-layer gear.
Comparative example 1
An 18Cr2Ni4W material is smelted by electroslag remelting, and then forging, mechanical rough machining and pre-heat treatment are carried out to prepare raw materials for carburizing. Followed by a standard carburization process. The carburizing temperature is 930 ℃, and the time is 6 hours, so that the thickness of the carburized layer reaches 3.2mm, and the carbon content is about 0.8 percent. After carburization, slowly cooling to 850 ℃, and then air cooling to room temperature. The hardness of the inner surface of the gear was 48HRC as shown in Table 3. Then carrying out induction heating treatment, wherein the maximum heating temperature is 760 ℃, and heating and then slowly cooling to room temperature. The hardness and austenite content of the inner surface layer of the gear were 45HRC and 15%, respectively, as shown in table 3.
After induction heating, inserting the spline. The hardness of the inner surface layer is higher than 40HRC, so that the spline cannot be inserted. In order to prevent gear scrap, only the traditional high-temperature tempering process can be carried out, then the spline is smoothly inserted, and then quenching, cryogenic treatment, low-temperature tempering and shot blasting are carried out according to the conventional process. And the final performance meets the standard requirement, and the heavy-load large-penetration-layer gear is obtained.
Comparative example 2
An 18Cr2Ni4W material is smelted by electroslag remelting, and then forging, mechanical rough machining and pre-heat treatment are carried out to prepare raw materials for carburizing. Followed by a standard carburization process. The carburizing temperature is 930 ℃, the time is 10 hours, the thickness of the carburized layer reaches 5.2mm, and the carbon content is about 0.85 percent. After carburization, the steel is slowly cooled to 845 ℃, and then air-cooled to room temperature. The hardness of the inner surface of the gear was 49HRC as shown in Table 4. Then, induction heating treatment is carried out, the maximum heating temperature is 750 ℃, and the temperature is slowly cooled to the room temperature after heating. The hardness and austenite content of the inner surface layer of the gear were 48HRC and 13%, respectively, as shown in table 4.
After induction heating, inserting the spline. The hardness of the inner surface layer is higher than 40HRC, so that the spline cannot be inserted. In order to prevent gear material from being scrapped, only a traditional high-temperature tempering process can be carried out, then the spline is smoothly inserted, and then quenching, cryogenic treatment, low-temperature tempering and shot blasting are carried out according to a conventional process to obtain the heavy-load large-penetration-layer gear, wherein the final performance meets the standard requirement.
Effect evaluation 1
Table 1 results of example 1
Table 2 results of example 2
Table 3 results of example 3
Table 4 results of example 4
TABLE 5 results of comparative example 1
TABLE 6 results of comparative example 2
As can be seen from the results of tables 1 to 6, in comparative examples 1 and 2, when the induction heating is high, the hardness of the inner surface layer is high, the austenite content of the surface layer is low, the spline is not smooth, and the performance cannot meet the requirements.
The heating depth is determined according to the size of the spline, and is generally about 10 mm. The choice of induction heating temperature is critical and too low a temperature to act to soften the tissue. The temperature is too high, but the structure of the surface layer is greatly transformed into austenite, and the hardness is improved. Because the structure of the inner surface layer is transformed into austenite to a large extent, the austenite is transformed into martensite later, and the hardness value is increased. At this time, induction hardening occurs, and is not the induction heating treatment in the present invention. The optimal effect of the induction heating treatment softens the martensitic matrix structure of the inner surface layer while producing an austenitic structure with a low hardness value of at least 22%. The hardness of the inner surface layer after carburization and before spline insertion is synergistically reduced to below 40HRC through softening of a martensite matrix structure and softening of an austenite structure. And then inserting splines into the inner ring of the gear according to the technical requirements.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications of the invention may be made without departing from the spirit or scope of the invention.
Claims (10)
1. A preparation method of a heavy-load large-penetration-layer gear comprises the following steps:
(1) processing the smelted 18Cr2Ni4W material into gear blank;
(2) carburizing the gear blank, and cooling to obtain a carburized gear;
(3) heating the inner surface layer of the carburized gear to 660-720 ℃, and inserting a spline to obtain a semi-finished gear;
(4) and sequentially carrying out quenching, deep cooling treatment, low-temperature tempering and shot blasting treatment on the semi-finished gear to obtain the heavy-load large-permeability gear.
2. The production method according to claim 1, wherein in the step (1), the processing method comprises forging, normalizing, tempering, size processing and annealing in sequence; the forging ratio of the forging is greater than 3.
3. The method as claimed in claim 2, wherein the normalizing temperature is 940-; the tempering temperature is 650-690 ℃, and the time is 3-8 h; the annealing temperature is 200-400 ℃, and the time is 3-5 h.
4. The preparation method as claimed in claim 1, wherein in the step (2), the temperature for carburizing is 915-945 ℃ and the time is 175-232 h.
5. The production method according to claim 1, wherein in the step (3), the heating depth is 5 to 15 mm.
6. The production method according to claim 1 or 5, wherein in the step (3), the heating is performed by induction coil heating.
7. The preparation method as claimed in claim 1, wherein in the step (4), the quenching temperature is 775-850 ℃ and the quenching time is 3-5 h.
8. The method according to claim 1, wherein the cryogenic treatment is carried out at a temperature of-120 to-80 ℃ for 2 to 3 hours in step (4).
9. The method as claimed in claim 1, wherein the low temperature tempering in step (4) is performed at a temperature of 160 ℃ and 250 ℃ for a time of 6-8 h.
10. A heavy duty macro-carburized gear produced by the production method according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111486797.7A CN114346625A (en) | 2021-12-07 | 2021-12-07 | Heavy-load large-seepage-layer gear and preparation method and application thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111486797.7A CN114346625A (en) | 2021-12-07 | 2021-12-07 | Heavy-load large-seepage-layer gear and preparation method and application thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114346625A true CN114346625A (en) | 2022-04-15 |
Family
ID=81096966
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111486797.7A Pending CN114346625A (en) | 2021-12-07 | 2021-12-07 | Heavy-load large-seepage-layer gear and preparation method and application thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114346625A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114807764A (en) * | 2022-04-29 | 2022-07-29 | 东风商用车有限公司 | High-nickel high-molybdenum carburizing steel for heavy gearbox gear, heat treatment and carburizing method |
| CN115283945A (en) * | 2022-07-19 | 2022-11-04 | 陕西法士特齿轮有限责任公司 | High-hardness synchronizer riveting locking pin and machining method thereof |
| CN116103604A (en) * | 2023-04-12 | 2023-05-12 | 常熟天地煤机装备有限公司 | Carburized gear and preparation method thereof |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103590049A (en) * | 2013-11-29 | 2014-02-19 | 重庆清平机械厂 | Processing method for spline of wind power output gear shaft |
| JP2016023346A (en) * | 2014-07-23 | 2016-02-08 | トヨタ自動車株式会社 | Carburization method of gear |
| CN105983844A (en) * | 2015-01-31 | 2016-10-05 | 重庆麦卡瑞机械制造有限公司 | Pinion machining process |
| CN106755773A (en) * | 2016-12-02 | 2017-05-31 | 哈尔滨东安发动机（集团）有限公司 | The softening method of carburized zone after a kind of CSS 42L pinion steel carburizings |
| CN107177726A (en) * | 2017-04-12 | 2017-09-19 | 万向钱潮传动轴有限公司 | A kind of carburizing means of defence |
| CN109321739A (en) * | 2018-12-04 | 2019-02-12 | 常熟天地煤机装备有限公司 | A kind of heat-treatment processing process of big infiltration layer heavy-duty gear |
-
2021
- 2021-12-07 CN CN202111486797.7A patent/CN114346625A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103590049A (en) * | 2013-11-29 | 2014-02-19 | 重庆清平机械厂 | Processing method for spline of wind power output gear shaft |
| JP2016023346A (en) * | 2014-07-23 | 2016-02-08 | トヨタ自動車株式会社 | Carburization method of gear |
| CN105983844A (en) * | 2015-01-31 | 2016-10-05 | 重庆麦卡瑞机械制造有限公司 | Pinion machining process |
| CN106755773A (en) * | 2016-12-02 | 2017-05-31 | 哈尔滨东安发动机（集团）有限公司 | The softening method of carburized zone after a kind of CSS 42L pinion steel carburizings |
| CN107177726A (en) * | 2017-04-12 | 2017-09-19 | 万向钱潮传动轴有限公司 | A kind of carburizing means of defence |
| CN109321739A (en) * | 2018-12-04 | 2019-02-12 | 常熟天地煤机装备有限公司 | A kind of heat-treatment processing process of big infiltration layer heavy-duty gear |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114807764A (en) * | 2022-04-29 | 2022-07-29 | 东风商用车有限公司 | High-nickel high-molybdenum carburizing steel for heavy gearbox gear, heat treatment and carburizing method |
| CN115283945A (en) * | 2022-07-19 | 2022-11-04 | 陕西法士特齿轮有限责任公司 | High-hardness synchronizer riveting locking pin and machining method thereof |
| CN115283945B (en) * | 2022-07-19 | 2024-04-09 | 陕西法士特齿轮有限责任公司 | High-hardness synchronizer riveting locking pin and processing method thereof |
| CN116103604A (en) * | 2023-04-12 | 2023-05-12 | 常熟天地煤机装备有限公司 | Carburized gear and preparation method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN114346625A (en) | Heavy-load large-seepage-layer gear and preparation method and application thereof | |
| CN102534134B (en) | Bainite isothermal quenching thermal treatment process method for medium-carbon bearing steel | |
| CN103834854B (en) | A kind of austempering ductile iron running roller for heat-treatment production line push-and-pull vehicle and production method thereof | |
| CN108118260A (en) | A kind of stainless Bearing gear steel of superpower superhard high temperature and preparation method | |
| CN104928586A (en) | Hot stamping die steel and production method thereof | |
| CN108220810A (en) | High tough high temperature nitriding steel of a kind of high abrasion and preparation method thereof | |
| CN107099767B (en) | A kind of explosion drill bit heat treatment process | |
| CN111893381A (en) | High-nitrogen stainless bearing steel and preparation method thereof | |
| CN111719111A (en) | Heat treatment method for improving comprehensive performance of steel for gear carburizing | |
| CN103498103B (en) | A kind of high-hardenability major diameter 65MnCr abrading-ball and preparation method thereof | |
| CN1876880A (en) | Cold-work die steel for high speed stamping | |
| CN114317897B (en) | Preliminary heat treatment process for super-strong high-toughness carburizing steel bar and forging | |
| CN110863141A (en) | Alloying and heat treatment method for high-wear-resistance carburized bearing steel | |
| CN113564496A (en) | Long-life railway bearing steel and preparation method thereof | |
| US20230366055A1 (en) | Method for preparing bainite hot-working die | |
| CN111172449B (en) | Wear-resistant cast steel lining plate and manufacturing method thereof | |
| CN113416883B (en) | Microalloyed carburized gear steel with ultrahigh strength and preparation method thereof | |
| CN105506496A (en) | High-strength prestressing force bolt production method | |
| CN102212664A (en) | Heat treatment method of stainless steel traction pin | |
| CN107904506A (en) | A kind of wear-resistant liner steel alloy | |
| CN112391582A (en) | Ultra-deep quench hardening layer forged steel cold rolling working roll and manufacturing method thereof | |
| CN107435124A (en) | High tungsten ledeburite pinion steel of hard high-wearing feature and preparation method thereof | |
| CN113416828B (en) | Preparation method of 16-27MnCrS5 round steel | |
| CN107779753B (en) | Low-hardenability high-carbon gear steel and heat treatment process | |
| CN105695684B (en) | The Technology for Heating Processing and high-carbon steel multi-alloy abrading-ball of high-carbon steel multi-alloy abrading-ball |
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 | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20220415 |