CN116200577A - Long gear shaft heat treatment deformation control method - Google Patents
Long gear shaft heat treatment deformation control method Download PDFInfo
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- CN116200577A CN116200577A CN202211632662.1A CN202211632662A CN116200577A CN 116200577 A CN116200577 A CN 116200577A CN 202211632662 A CN202211632662 A CN 202211632662A CN 116200577 A CN116200577 A CN 116200577A
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 52
- 238000000034 method Methods 0.000 title claims abstract description 31
- ATUOYWHBWRKTHZ-UHFFFAOYSA-N Propane Chemical compound CCC ATUOYWHBWRKTHZ-UHFFFAOYSA-N 0.000 claims description 78
- 238000010791 quenching Methods 0.000 claims description 43
- 230000000171 quenching effect Effects 0.000 claims description 43
- 238000000137 annealing Methods 0.000 claims description 39
- 239000001294 propane Substances 0.000 claims description 39
- 238000001816 cooling Methods 0.000 claims description 28
- 238000004140 cleaning Methods 0.000 claims description 18
- 238000002791 soaking Methods 0.000 claims description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 5
- 238000005406 washing Methods 0.000 claims description 2
- 238000003754 machining Methods 0.000 abstract description 4
- 238000002474 experimental method Methods 0.000 description 21
- 239000000463 material Substances 0.000 description 11
- 238000012797 qualification Methods 0.000 description 7
- 230000005540 biological transmission Effects 0.000 description 6
- 238000001514 detection method Methods 0.000 description 5
- 230000009191 jumping Effects 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000004321 preservation Methods 0.000 description 4
- 238000012545 processing Methods 0.000 description 4
- 238000005255 carburizing Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 3
- 238000005496 tempering Methods 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 239000007769 metal material Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 229910000851 Alloy steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 230000009347 mechanical transmission Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- 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
- C21D1/26—Methods of annealing
-
- 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
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/74—Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material
-
- 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
- C21D11/00—Process control or regulation for heat treatments
-
- 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
- C21D9/28—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for plain shafts
-
- 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
- C21D9/32—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for gear wheels, worm wheels, or the like
-
- 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
- Y02P10/20—Recycling
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Heat Treatment Of Articles (AREA)
Abstract
The invention relates to the technical field of machining of bevel gears and motor gears, in particular to a method for controlling heat treatment deformation of a long gear shaft.
Description
Technical Field
The invention relates to the technical field of machining of bevel gears and motor gears, in particular to a long gear shaft heat treatment deformation control method.
Background
The gear is a common part commonly used in mechanical transmission, the gear adopts high-quality high-strength alloy steel, and is subjected to surface carburization hardening treatment, so that the bearing capacity is high, and the gear is durable. In practical application, the helical gear has the characteristics of stable transmission, small impact, vibration, noise and the like, so the helical gear is widely used in high-speed heavy-load occasions. The helical gear is not exactly a helical gear, but it should be said that a helical gear is a meshing manner of two helical gears, which are distinguished by their different directions of spatial transmission forces. The common spur gears are meshed along the tooth width at the same time, so that impact vibration noise is generated, and the transmission is unstable. The helical gear transmission is superior to that of straight teeth, and the center distance can be compact for high-speed heavy load.
Gear motors are commonly used in low speed, high torque transmission devices, which achieve the purpose of deceleration by transmitting the motor or other high speed transmission device to the gear of the output shaft via a speed reducer.
In the development of bevel gears and motor gears, heat treatment of materials is a very important manufacturing means, which can change the physical and chemical properties of materials and plays an important role in industrial production. The material is subjected to heat treatment, and various products are mainly prepared from the material through the processes of high-temperature heating, heat preservation, cooling and the like. In the process, the high temperature easily deforms the metal material, the internal structure and the structure of the metal material are changed, and the performance of the material is changed; in addition, the phenomenon of uneven chemical components in the material is easy to occur, and the phenomena of thickness change, length change, distortion and the like of the material can occur after a cooling link. Therefore, in the process of carrying out heat treatment on the material, the operation needs to be carried out by staff with very strong specialty, the influence factors of heat treatment deformation of the material are analyzed, and the summary solution measures are summarized so as to reduce the deformation probability of the material and improve the quality of processed products of the material.
Patent application number CN201811109633.0, which in the specification states "comprising: rough machining; performing stress relief annealing treatment on the parts after rough machining; hobbing, wherein hobbing is carried out at two ends of the part, and tooth surface grinding allowance is reserved; carburizing, namely detecting the deformation direction and the deformation amount of the part after carburization; the pressurizing, straightening and quenching treatment is carried out, and a pressurizing position is selected according to the deformation direction and the deformation amount of the part, and a supporting part is correspondingly arranged; placing a pressurizing weight at the upper end of the part corresponding to the pressurizing position; the part, the supporting part and the pressurized heavy object are integrally hung into a quenching furnace for heat preservation, and then quenching oil is integrally hung out; and (5) carrying out low-temperature tempering and stress relieving treatment after quenching. Through the technical process, the supporting points are arranged in the quenching process, and the quenching deformation is effectively reduced by carrying out pressurized quenching on the supporting points, so that the qualified rate is greatly improved, the rejection rate is obviously reduced, and the problem of deformation control of the long gear shaft with the large-span herringbone teeth is solved.
In summary, developing a method for controlling deformation of a long gear shaft in heat treatment is a key problem to be solved in the technical field of processing of bevel gears and motor gears.
Disclosure of Invention
Compared with the prior art, the method provided by the invention not only can not influence the hardness performance of the long gear shaft, but also can effectively improve the qualification rate of the long gear shaft, reduce the rejection rate and the production cost for processing the long gear shaft, and in addition, can effectively reduce the middle deformation amount of the long gear shaft and the jumping amplitude of the tooth part, thereby realizing the deformation control of the long gear shaft.
In order to achieve the above purpose, the present invention provides the following technical solutions:
the invention provides a long gear shaft heat treatment deformation control method, which comprises the following steps:
(1) Heating the annealing furnace to 800-820 ℃, taking a rough machined long gear shaft, placing the long gear shaft in the annealing furnace, introducing propane gas into the annealing furnace, and adjusting the temperature of the annealing furnace to 910-915 ℃ for annealing treatment;
(2) Raising the furnace temperature to 920-922 ℃, keeping the introduced propane gas unchanged, preserving heat for 180min, keeping the furnace temperature unchanged, adjusting the introduced propane gas, and preserving heat for 60min;
(3) Reducing the furnace temperature to 835-845 ℃, keeping the introduced propane gas unchanged, and preserving the heat for 45min;
(4) The long gear shaft is placed in quenching oil for cooling, and after the long gear shaft is completely immersed in the quenching oil, the quenching oil is stirred;
(5) Taking out the long gear shaft from the quenching oil, cooling the long gear shaft for 30min in an environment with the temperature of 60 ℃, and then placing the long gear shaft into a cleaning machine for soaking and cleaning;
(6) Heating the long gear shaft to 180-200 ℃, preserving heat for 120min, and then cooling to room temperature to finish the heat treatment of the long gear shaft.
The invention is further provided with: in the step (1), the flow rate of the propane is 0.4-0.5m 3 /h。
The invention is further provided with: in the step (1), the annealing treatment time is 60-90min.
The invention is further provided with: in the step (2), the adjustment of the inflow amount of the propane gas means adjustment of the inflow amount of the propane to be 0.2-0.3m 3 /h。
The invention is further provided with: in the step (4), the temperature of the quenching oil is 80-82 ℃.
The invention is further provided with: in the step (4), the long gear shaft is immersed in the quenching oil for 20-30min.
The invention is further provided with: in the step (5), the water temperature of the cleaning machine is 60-62 ℃, and the cleaning time is 12-14min.
The invention is further provided with: in the step (6), the cooling to the room temperature means that the temperature is cooled from 180-200 ℃ to the room temperature at a rate of 5 ℃/min.
Advantageous effects
Compared with the known public technology, the technical scheme provided by the invention has the following beneficial effects:
the invention provides a method for controlling the deformation of a long gear shaft in heat treatment, which comprises the steps of heating an annealing furnace, taking a rough long gear shaft, placing the rough long gear shaft in the annealing furnace, introducing propane gas, adjusting the temperature of the annealing furnace, annealing, then lifting the furnace temperature, adjusting the introducing amount of the propane gas, carrying out heat preservation treatment, finally reducing the furnace temperature to carry out carburizing treatment, quenching the carburized long gear shaft in quenching oil, cooling and cleaning, tempering again, completing the heat treatment on the long gear shaft,
compared with the prior art, the method provided by the invention not only can not influence the hardness performance, but also can effectively improve the qualification rate of the long gear shaft, reduce the rejection rate and the production cost for processing the long gear shaft, and in addition, can effectively reduce the middle deformation of the long gear shaft and the jumping amplitude of the tooth part, thereby realizing the deformation control of the long gear shaft and having wide application prospect.
Drawings
FIG. 1 is a schematic diagram of the qualification rate of each long gear shaft in the performance test of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below. It will be apparent that the described embodiments are 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.
The invention is further described below with reference to examples.
Example 1:
the invention provides a long gear shaft heat treatment deformation control method, which comprises the following steps:
(1) Heating the annealing furnace to 800 ℃, taking a rough machined long gear shaft, placing the rough machined long gear shaft in the annealing furnace, introducing propane gas into the annealing furnace, and adjusting the temperature of the annealing furnace to 910 ℃ for annealing treatment.
Further, the flow rate of propane was 0.4m 3 /h。
Further, the annealing treatment time was 60 minutes.
(2) Raising the furnace temperature to 920 ℃, keeping the introduced propane gas unchanged, preserving heat for 180min, keeping the furnace temperature unchanged, adjusting the introduced propane gas, and preserving heat for 60min.
Further, adjusting the flow rate of propane gas means adjusting the flow rate of propane to 0.2m 3 /h。
(3) Reducing the furnace temperature to 835 ℃, keeping the introduced propane gas unchanged, and preserving the heat for 45min.
(4) The long gear shaft is placed in quenching oil for cooling, and after the long gear shaft is completely immersed in the quenching oil, the quenching oil is stirred.
Further, the temperature of the quenching oil was 80 ℃.
Further, the long gear shaft was immersed in the quenching oil for 20 minutes.
(5) And taking the long gear shaft out of the quenching oil, cooling the long gear shaft in an environment with the temperature of 60 ℃ for 30min, and then placing the long gear shaft in a cleaning machine for soaking and cleaning.
Further, the water temperature of the cleaning machine is 60 ℃, and the cleaning time is 12min.
Further, the quenching oil is preferably KR468C.
(6) And heating the long gear shaft to 180 ℃, preserving heat for 120min, and then cooling to room temperature to finish the heat treatment of the long gear shaft.
Further, cooling to room temperature means cooling the temperature from 180℃to room temperature at a rate of 5℃per minute.
Example 2:
the invention provides a long gear shaft heat treatment deformation control method, which comprises the following steps:
(1) Heating the annealing furnace to 810 ℃, taking a rough machined long gear shaft, placing the long gear shaft in the annealing furnace, introducing propane gas into the annealing furnace, and adjusting the temperature of the annealing furnace to 912 ℃ for annealing treatment.
Further, the flow rate of propane was 0.5m 3 /h。
Further, the annealing treatment time was 75min.
(2) Raising the furnace temperature to 921 ℃, keeping the introduced propane gas unchanged, preserving heat for 180min, keeping the furnace temperature unchanged, adjusting the introduced propane gas, and preserving heat for 60min.
Further, adjusting the flow rate of propane gas means adjusting the flow rate of propane to 0.3m 3 /h。
(3) Reducing the furnace temperature to 840 ℃, keeping the introduced propane gas unchanged, and preserving the heat for 45min.
(4) The long gear shaft is placed in quenching oil for cooling, and after the long gear shaft is completely immersed in the quenching oil, the quenching oil is stirred.
Further, the temperature of the quenching oil was 81 ℃.
Further, the long gear shaft was immersed in the quenching oil for 25 minutes.
(5) And taking the long gear shaft out of the quenching oil, cooling the long gear shaft in an environment with the temperature of 60 ℃ for 30min, and then placing the long gear shaft in a cleaning machine for soaking and cleaning.
Further, the water temperature of the washer was 61℃and the washing time was 13 minutes.
Further, the quenching oil is preferably KR468C.
(6) And heating the long gear shaft to 190 ℃, preserving heat for 120min, and then cooling to room temperature to finish the heat treatment of the long gear shaft.
Further, cooling to room temperature means cooling the temperature from 190℃to room temperature at a rate of 5℃per minute.
Example 3:
the invention provides a long gear shaft heat treatment deformation control method, which comprises the following steps:
(1) Heating the annealing furnace to 820 ℃, taking a rough machined long gear shaft, placing the rough machined long gear shaft in the annealing furnace, introducing propane gas into the annealing furnace, and adjusting the temperature of the annealing furnace to 915 ℃ for annealing treatment.
Further, the flow rate of propane was 0.5m 3 /h。
Further, the annealing treatment time was 90min.
(2) Raising the furnace temperature to 922 ℃, keeping the introduced propane gas unchanged, preserving heat for 180min, keeping the furnace temperature unchanged, adjusting the introduced propane gas, and preserving heat for 60min.
Further, adjusting the flow rate of propane gas means adjusting the flow rate of propane to 0.3m 3 /h。
(3) Reducing the furnace temperature to 845 ℃, keeping the introduced propane gas unchanged, and preserving the heat for 45min.
(4) The long gear shaft is placed in quenching oil for cooling, and after the long gear shaft is completely immersed in the quenching oil, the quenching oil is stirred.
Further, the temperature of the quenching oil was 82 ℃.
Further, the long gear shaft was immersed in the quenching oil for 30 minutes.
(5) And taking the long gear shaft out of the quenching oil, cooling the long gear shaft in an environment with the temperature of 60 ℃ for 30min, and then placing the long gear shaft in a cleaning machine for soaking and cleaning.
Further, the water temperature of the cleaning machine is 62 ℃, and the cleaning time is 14min.
Further, the quenching oil is preferably KR468C.
(6) And heating the long gear shaft to 200 ℃, preserving heat for 120min, and then cooling to room temperature to finish the heat treatment of the long gear shaft.
Further, cooling to room temperature means cooling the temperature from 200 ℃ to room temperature at a rate of 5 ℃/min.
And (3) performance detection:
the heat treatment of the long gear shafts was completed by the methods of examples 1 to 3, respectively, as experiment 1 group, experiment 2 group and experiment 3 group, and then the heat treatment of the long gear shafts was completed by the method of patent application No. CN201811109633.0, as a control group.
1) The long gear shafts provided for each group were tested for eligibility and the test results obtained are recorded in table 1.
Table 1: all long gear shaft qualification rate detection record table
| Group of | n | Yield (%) |
| Experiment 1 |
100 | 98 |
| Experiment 2 |
100 | 97 |
| Experiment 3 |
100 | 99 |
| |
100 | 90 |
As shown in table 1 and fig. 1, compared with the control group, the qualification rate of the long gear shaft is obviously higher than that of the control group (p < 0.05) after the heat treatment of the long gear shaft is completed in the example 1, the example 2 and the example 3, and the qualification rate difference of the long gear shaft is not obvious (p > 0.05) after the heat treatment of the long gear shaft is completed in each experimental group (experiment 1, experiment 2 and experiment 3), it is known that the deformation control method for the heat treatment of the long gear shaft provided by the invention can effectively improve the qualification rate of the long gear shaft, reduce the rejection rate and reduce the production cost for processing the long gear shaft after the heat treatment of the long gear shaft is completed.
2) Deformation of the long gear shafts provided in each group was detected, and the obtained test results were recorded in table 2.
Table 2: detection record table for deformation detection of each long gear shaft
| Group of | n | Middle deformation (mm) | Maximum jumping width of tooth (%) |
| Experiment 1 group | 6 | 0.81 | 95 |
| Experiment 2 group | 6 | 0.84 | 91 |
| Experiment 3 group | 6 | 0.82 | 94 |
| Control group | 6 | 1.2 | 82 |
As shown in table 2, compared with the control group, the deformation amount of the middle part and the maximum jumping reduction amplitude of the tooth part of the long gear shaft are obviously better than those of the control group (p < 0.05) after the heat treatment of the long gear shaft is finished in the embodiment 1, the embodiment 2 and the embodiment 3, and the deformation control method for the heat treatment of the long gear shaft can effectively reduce the deformation amount of the middle part and the jumping amplitude of the tooth part of the long gear shaft after the heat treatment of the long gear shaft is finished in each experimental group (experiment 1, experiment 2 and experiment 3), so that the deformation control of the long gear shaft is realized.
3) The hardness of the long gear shaft provided in each group was examined (the hardness of the control group was regarded as 1, the hardness of each experimental group was calculated relative to the control group), and the obtained test results were recorded in table 3.
Table 3: hardness detection record table for each long gear shaft
| Group of | n | Hardness of |
| Experiment 1 group | 10 | 1.0 |
| Experiment 2 group | 10 | 1.0 |
| Experiment 3 group | 10 | 1.1 |
| Control group | 10 | 1.0 |
As shown in table 3, the difference between the hardness of the long gear shaft and the control group after the heat treatment of the long gear shaft is completed in example 1, example 2 and example 3 is not significant (p > 0.05) compared with the control group, and the difference between the hardness of the long gear shaft and the control group after the heat treatment of the long gear shaft is completed in each of the experimental groups (experiment 1, experiment 2 and experiment 3) is not significant (p > 0.05), it is understood that the deformation control method for the heat treatment of the long gear shaft provided by the present invention does not affect the hardness performance of the long gear shaft compared with the prior art after the heat treatment of the long gear shaft is completed.
According to the method for controlling the deformation of the long gear shaft by heat treatment, the annealing furnace is heated, the rough machined long gear shaft is taken and placed in the annealing furnace, meanwhile propane gas is introduced, the annealing treatment is carried out after the temperature of the annealing furnace is adjusted, the furnace temperature is raised, the introducing amount of the propane gas is adjusted, heat preservation treatment is carried out, finally the furnace temperature is reduced to carry out carburizing treatment, the carburized long gear shaft is quenched in quenching oil, and after cooling and cleaning, tempering treatment is carried out again, so that the heat treatment of the long gear shaft is completed.
The above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (8)
1. The heat treatment deformation control method for the long gear shaft is characterized by comprising the following steps of:
(1) Heating the annealing furnace to 800-820 ℃, taking a rough machined long gear shaft, placing the long gear shaft in the annealing furnace, introducing propane gas into the annealing furnace, and adjusting the temperature of the annealing furnace to 910-915 ℃ for annealing treatment;
(2) Raising the furnace temperature to 920-922 ℃, keeping the introduced propane gas unchanged, preserving heat for 180min, keeping the furnace temperature unchanged, adjusting the introduced propane gas, and preserving heat for 60min;
(3) Reducing the furnace temperature to 835-845 ℃, keeping the introduced propane gas unchanged, and preserving the heat for 45min;
(4) The long gear shaft is placed in quenching oil for cooling, and after the long gear shaft is completely immersed in the quenching oil, the quenching oil is stirred;
(5) Taking out the long gear shaft from the quenching oil, cooling the long gear shaft for 30min in an environment with the temperature of 60 ℃, and then placing the long gear shaft into a cleaning machine for soaking and cleaning;
(6) Heating the long gear shaft to 180-200 ℃, preserving heat for 120min, and then cooling to room temperature to finish the heat treatment of the long gear shaft.
2. The method for controlling deformation of a long gear shaft by heat treatment according to claim 1, wherein in the step (1), the flow rate of propane is 0.4 to 0.5m 3 /h。
3. The method of claim 1, wherein in the step (1), the annealing treatment is performed for 60 to 90 minutes.
4. According toThe method for controlling deformation of a long gear shaft by heat treatment according to claim 1, wherein in the step (2), the adjustment of the inflow amount of propane gas means adjustment of the inflow amount of propane to 0.2 to 0.3m 3 /h。
5. The method of claim 1, wherein in the step (4), the temperature of the quenching oil is 80-82 ℃.
6. The method for controlling deformation of a long gear shaft by heat treatment according to claim 1, wherein in the step (4), the long gear shaft is immersed in the quenching oil for 20 to 30 minutes.
7. The method for controlling deformation of a long gear shaft by heat treatment according to claim 1, wherein in the step (5), the water temperature of the washer is 60-62 ℃ and the washing time is 12-14min.
8. The method of claim 1, wherein in the step (6), the cooling to room temperature means cooling the temperature from 180 to 200 ℃ to room temperature at a rate of 5 ℃/min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211632662.1A CN116200577A (en) | 2022-12-19 | 2022-12-19 | Long gear shaft heat treatment deformation control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211632662.1A CN116200577A (en) | 2022-12-19 | 2022-12-19 | Long gear shaft heat treatment deformation control method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116200577A true CN116200577A (en) | 2023-06-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211632662.1A Withdrawn CN116200577A (en) | 2022-12-19 | 2022-12-19 | Long gear shaft heat treatment deformation control method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116200577A (en) |
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2022
- 2022-12-19 CN CN202211632662.1A patent/CN116200577A/en not_active Withdrawn
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Application publication date: 20230602 |