CN114293138A - Vacuum low-pressure carburizing process for shaft gear parts - Google Patents
Vacuum low-pressure carburizing process for shaft gear parts Download PDFInfo
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- CN114293138A CN114293138A CN202111675718.7A CN202111675718A CN114293138A CN 114293138 A CN114293138 A CN 114293138A CN 202111675718 A CN202111675718 A CN 202111675718A CN 114293138 A CN114293138 A CN 114293138A
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- 238000005255 carburizing Methods 0.000 title claims abstract description 121
- 238000000034 method Methods 0.000 title claims abstract description 77
- 238000010791 quenching Methods 0.000 claims abstract description 48
- 230000000171 quenching effect Effects 0.000 claims abstract description 48
- 238000010438 heat treatment Methods 0.000 claims abstract description 45
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 34
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 17
- AAYFQAPISKPSSI-UHFFFAOYSA-N [N].C#C Chemical compound [N].C#C AAYFQAPISKPSSI-UHFFFAOYSA-N 0.000 claims abstract description 8
- 239000007789 gas Substances 0.000 claims description 19
- 238000009792 diffusion process Methods 0.000 claims description 13
- HSFWRNGVRCDJHI-UHFFFAOYSA-N alpha-acetylene Natural products C#C HSFWRNGVRCDJHI-UHFFFAOYSA-N 0.000 claims description 10
- 125000002534 ethynyl group Chemical group [H]C#C* 0.000 claims description 10
- 230000035515 penetration Effects 0.000 claims description 10
- 238000004321 preservation Methods 0.000 claims description 7
- 230000000630 rising effect Effects 0.000 claims description 6
- 238000005086 pumping Methods 0.000 claims description 3
- 238000003756 stirring Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 8
- 239000002912 waste gas Substances 0.000 abstract description 7
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract description 6
- 229910052799 carbon Inorganic materials 0.000 abstract description 6
- 230000008595 infiltration Effects 0.000 abstract description 4
- 238000001764 infiltration Methods 0.000 abstract description 4
- 239000010410 layer Substances 0.000 description 13
- 239000003638 chemical reducing agent Substances 0.000 description 4
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 238000010998 test method Methods 0.000 description 2
- 229910000851 Alloy steel Inorganic materials 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 238000009432 framing Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
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Abstract
The invention discloses a vacuum low-pressure carburizing process for shaft and gear parts, and belongs to the technical field of heat treatment. The vacuum low-pressure carburizing process for the shaft tooth parts sequentially comprises a heating-up stage, a carburizing stage and a quenching stage, wherein the heating-up stage adopts a stepped heating-up and heat-preserving mode to heat up to the carburizing process temperature, so that the processing stress of the shaft tooth parts can be eliminated, the deformation of the parts in the heating process is reduced, the carburizing deformation of the shaft tooth parts reaches 0.005-0.015 mm, and the distortion problem generated in the carburizing process of the shaft tooth parts is effectively solved; in addition, in the vacuum low-pressure strong infiltration stage, acetylene-nitrogen alternate pulses are used as a carburizing atmosphere, and waste gas generated in the furnace is exhausted by using nitrogen, so that the depth of an effective carburized layer and the surface carbon content are more accurately controlled, and the surface carburization effect of the shaft-gear parts is improved.
Description
Technical Field
The invention relates to a heat treatment process, in particular to a vacuum low-pressure carburizing process for shaft and gear parts.
Background
The shaft tooth parts are widely applied in the industrial technology. As shown in figure 1, the input shaft tooth part of the speed reducer of the industrial robot is provided with a tooth-shaped structure 1 at one end, a blind hole 2 at the other end, and a key groove 3 in the blind hole 2, and the key part mainly plays a role in transmitting torque, has complex working conditions and is required to have excellent wear resistance, contact fatigue resistance and bending fatigue resistance.
Carburizing and quenching are common heat treatment processes for improving the wear resistance of workpieces by enabling the surfaces of the workpieces to have high hardness, and in order to enable the shaft and gear parts to have good wear resistance, carburizing treatment is also needed. The most common carburizing process for the shaft and gear parts is gas carburizing, for example, the Chinese patent No. ZL201610711836.1 discloses a heat treatment process for reducing the deformation of a key groove of a gear shaft, which adopts an atmosphere carburizing process to carry out temperature-rising heat-preservation carburizing treatment in a protective atmosphere environment and has the advantages of low carburizing cost, high speed, stable carburizing quality, easy control of carburizing atmosphere, easy control of the surface quality of a carburized layer and the like. However, in the gas carburizing process, a methanol atmosphere is generally used, and since low temperature heat preservation has a potential safety hazard of explosion, gas carburizing cannot be performed at a temperature of 700 ℃ or lower, and generally needs to be performed by performing a carburizing treatment after rapidly raising the temperature to 800 ℃ or higher, which is also a main reason for raising the temperature and preserving the temperature from 830 ℃ in the above patent application. And because the part can not keep warm at the low-temperature stage below 700 ℃, the heat treatment deformation can be generated in the heating process at the low-temperature stage, the deformation of the key groove and the deformation of the tooth form reach 0.03-0.05 mm, and the deformation can not meet the requirement of heat treatment indexes for precision machinery. In addition, the gas carburizing process cannot ensure that a sufficient carburized layer is formed in the blind hole of the part, and the carburizing quality is not easy to control.
The vacuum low-pressure carburization is an upgrade of the traditional atmosphere carburization process, the surface of the steel part is subjected to carburizing and quenching treatment by utilizing a vacuum technology, so that the carbon concentration of the surface of the steel part is increased and reaches a certain depth, and the hardness and the strength of the surface layer of the carburizing and quenching part are improved. For high-precision shaft tooth parts, the requirement on tooth profile precision is very high, the tooth profile distortion quantity of the shaft tooth parts shown in fig. 1 is required to be controlled to be 0.015-0.025 mm, and the problem that the deformation quantity of a key groove and the tooth profile is too large still exists in the existing vacuum low-pressure carburizing process. Therefore, according to the precision requirement of the shaft gear parts, the existing vacuum low-pressure carburizing process needs to be improved so as to reduce the carburization deformation of the parts.
Disclosure of Invention
1. Technical problem to be solved by the invention
The invention aims to overcome the defect of large tooth form distortion in the existing carburizing treatment of the shaft-tooth parts, and provides a vacuum low-pressure carburizing process for the shaft-tooth parts, wherein by adopting the technical scheme of the invention, the temperature is raised to the carburizing process temperature in a step-type temperature raising and preserving way, the processing stress of the shaft-tooth parts can be eliminated, the deformation of the parts in the heating process is reduced, the carburizing deformation of the shaft-tooth parts reaches 0.005-0.015 mm, and the problem of tooth form distortion generated in the carburizing process of the shaft-tooth parts is effectively solved; in addition, in the vacuum low-pressure strong infiltration stage, acetylene-nitrogen alternate pulses are used as a carburizing atmosphere, and waste gas generated in the furnace is exhausted by using nitrogen, so that the depth of an effective carburized layer and the surface carbon content are more accurately controlled, and the surface carburization effect of the shaft-gear parts is improved.
2. Technical scheme
In order to achieve the purpose, the technical scheme provided by the invention is as follows:
the invention relates to a vacuum low-pressure carburizing process for shaft and gear parts, which sequentially comprises a temperature rising stage, a carburizing stage and a quenching stage, wherein,
the temperature rise stage adopts a stepped temperature rise and preservation process, and the specific process is as follows:
heating the workpiece to 300 +/-5 ℃, and carrying out uniform temperature for 20-40 min;
heating the workpiece to 480 +/-5 ℃, and carrying out uniform temperature for 20-40 min;
heating the workpiece to 680 +/-5 ℃, and carrying out uniform temperature for 20-40 min;
heating the workpiece to 780 +/-5 ℃, and carrying out uniform temperature for 20-40 min;
heating the workpiece to 850 +/-5 ℃, and carrying out uniform temperature for 20-40 min;
heating the workpiece to 950-1020 ℃ and entering a carburizing stage;
the carburizing stage comprises a strong carburizing stage and a diffusion stage, wherein the strong carburizing stage adopts a pulse type carburizing process, and acetylene-nitrogen alternate pulses are used as carburizing atmosphere in a vacuum pumping state, and acetylene gas and nitrogen are alternately introduced; after the strong cementation stage is finished, maintaining the temperature of the carburization process to enter a diffusion stage;
and entering a quenching stage after the diffusion stage is completed.
Furthermore, in the strong penetration stage, acetylene gas is introduced for 2-20 seconds and then nitrogen is introduced for 5-40 seconds to form a carburization pulse period, and the whole strong penetration stage consists of a plurality of carburization pulse periods.
Further, the hard-carburizing period consists of 5 carburizing pulse cycles.
Furthermore, the furnace pressure in the carburizing stage is controlled to be 550-900 Pa.
Further, the degree of vacuum in the temperature raising stage is controlled to 1Pa or less.
Furthermore, the quenching stage adopts a vacuum high-pressure gas quenching or oil quenching mode for quenching treatment.
Furthermore, the quenching temperature in the quenching stage is 830 +/-5 ℃, the vacuum isothermal quenching oil with the temperature of 135 +/-5 ℃ is adopted for quenching, and meanwhile, the low-speed stirring is carried out at the frequency of 15 Hz.
3. Advantageous effects
Compared with the prior art, the technical scheme provided by the invention has the following remarkable effects:
the vacuum low-pressure carburizing process for the shaft-gear parts sequentially comprises a heating-up stage, a carburizing stage and a quenching stage, wherein the heating-up stage adopts a stepped heating-up and heat-preserving mode to heat up to the carburizing process temperature, so that the processing stress of the shaft-gear parts can be eliminated, the deformation of the parts in the heating process is reduced, the carburizing deformation of the shaft-gear parts reaches 0.005-0.015 mm, and the problem of tooth profile distortion generated in the carburizing process of the shaft-gear parts is effectively solved; in addition, in the vacuum low-pressure strong infiltration stage, acetylene-nitrogen alternate pulses are used as a carburizing atmosphere, and waste gas generated in the furnace is exhausted by using nitrogen, so that the depth of an effective carburized layer and the surface carbon content are more accurately controlled, and the surface carburization effect of the shaft-gear parts is improved.
Drawings
FIG. 1 is a schematic cross-sectional view of a conventional shaft-tooth component;
FIG. 2 is a process curve diagram of the stepped temperature rise and preservation in the vacuum low-pressure carburization process of the shaft-gear parts of the present invention;
FIG. 3 is a process chart of the carburizing stage in the vacuum low-pressure carburizing process for the shaft and gear parts of the invention;
FIG. 4 is a diagram of a 9-point test method pick-up test orientation in the present invention.
The reference numerals in the schematic drawings illustrate:
1. a tooth-shaped structure; 2. blind holes; 3. a keyway.
Detailed Description
For a further understanding of the invention, reference should be made to the following detailed description taken in conjunction with the accompanying drawings.
Referring to fig. 2 and 3, the vacuum low-pressure carburizing process for the shaft and gear part of the invention sequentially comprises a temperature rising stage, a carburizing stage and a quenching stage, wherein:
the temperature rising stage adopts a step-type temperature rising and preserving process, as shown in figure 2, the specific process is as follows:
heating the workpiece to 300 +/-5 ℃, and carrying out uniform temperature for 20-40 min;
heating the workpiece to 480 +/-5 ℃, and carrying out uniform temperature for 20-40 min;
heating the workpiece to 680 +/-5 ℃, and carrying out uniform temperature for 20-40 min;
heating the workpiece to 780 +/-5 ℃, and carrying out uniform temperature for 20-40 min;
heating the workpiece to 850 +/-5 ℃, and carrying out uniform temperature for 20-40 min;
heating the workpiece to 950-1020 ℃ and entering a carburizing stage; the vacuum degree in the temperature raising stage is controlled to be 1Pa or less.
As shown in fig. 3, the carburizing stage includes a strong carburizing stage and a diffusion stage, the strong carburizing stage adopts a pulse carburizing process, acetylene-nitrogen alternating pulses are used as carburizing atmosphere in a vacuum pumping state, acetylene gas and nitrogen are alternately introduced, specifically, the furnace pressure in the carburizing stage is controlled to be 550-900 Pa, in the strong carburizing stage, acetylene gas is introduced for keeping for 2-20 seconds and then nitrogen is introduced for 5-40 seconds to form a carburizing pulse period, and the whole strong carburizing stage is composed of a plurality of carburizing pulse periods; after the strong cementation stage is finished, maintaining the temperature of the carburization process to enter a diffusion stage; after the diffusion stage is finished, the quenching stage is carried out, and the quenching process can be carried out by adopting the existing quenching process, such as a vacuum high-pressure gas quenching or oil quenching mode.
The present invention will be further described with reference to the following examples.
[ example 1]
Taking an input shaft tooth part of a speed reducer of an industrial robot shown in fig. 1 as an example, the material of the input shaft tooth part is SCM420H alloy steel, and the heat treatment technical requirements are as follows: the carburized layer has an effective hardened layer depth (PCD 550HV) of 0.425-0.775 mm, a surface hardness of 80.1-82.5 HRA, and a tooth profile distortion of 0.015-0.025 mm.
In order to meet the technical requirements of the heat treatment, the vacuum low-pressure carburizing process for the shaft and gear parts in the embodiment sequentially comprises a temperature rising stage, a carburizing stage and a quenching stage. In the temperature rise stage, framing the workpiece, placing the workpiece in a furnace, adopting a stepped temperature rise and preservation process shown in figure 2, controlling the vacuum degree in the furnace to be below 1Pa, sequentially raising the temperature of the workpiece to 300 +/-5 ℃, and carrying out temperature equalization for 20 min; heating to 480 +/-5 ℃, and carrying out temperature equalization for 20 min; heating to 680 + -5 deg.C, and homogenizing for 20 min; heating to 780 +/-5 ℃, and carrying out uniform temperature for 20 min; heating to 850 + -5 deg.C, and keeping the temperature for 20 min; raising the temperature to 960 ℃, reaching the carburizing process temperature, and entering the carburizing stage. The specific carburizing process temperature can be determined according to the performance of the carburizing furnace. Through the step-type temperature rise and preservation process, the workpiece is gradually raised from low temperature to the carburizing process temperature, the processing stress of the part is effectively eliminated, and the deformation of the part in the heating process is further reduced.
In the carburizing stage, the carburizing stage comprises a strong carburizing stage and a diffusion stage, wherein the strong carburizing stage adopts a pulse type carburizing process, acetylene-nitrogen alternate pulses are used as carburizing atmosphere, the furnace pressure is controlled at 820-850 Pa, and acetylene gas and nitrogen are alternately introduced; specifically, acetylene gas is introduced and kept for 2 seconds, then nitrogen is introduced for 5 seconds to form a carburizing pulse period, the whole strong carburizing stage is composed of a plurality of carburizing pulse periods, and 5 carburizing pulse periods are adopted in the embodiment. The waste gas generated in the furnace is exhausted by using nitrogen, so that the depth of an effective carburized layer and the carbon content of the surface are more accurately controlled, and the surface carburization effect of the shaft-gear parts is improved.
After the strong cementation stage is finished, maintaining the temperature of the carburization process to enter a diffusion stage, and forming a surface carburized layer after diffusion for a period of time; and entering a quenching stage after the diffusion stage is finished, wherein the quenching stage can be subjected to quenching treatment in a vacuum high-pressure gas quenching or oil quenching mode, specifically, in the embodiment, the quenching temperature in the quenching stage is 830 +/-5 ℃, the quenching is performed by using 135 +/-5 ℃ vacuum isothermal quenching oil, and meanwhile, the low-speed stirring is performed at the frequency of 15Hz, so that the uniform cooling of the part is ensured, and the deformation of the part is reduced.
[ example 2]
The vacuum low-pressure carburizing process for the shaft-gear part in the embodiment also takes an input shaft-gear part of a speed reducer of an industrial robot shown in fig. 1 as an example, and the basic process flow is the same as that in embodiment 1, except that:
in the temperature rise stage, controlling the vacuum degree in the furnace to be less than 1Pa, sequentially raising the temperature of the workpiece to 300 +/-5 ℃, and carrying out temperature equalization for 40 min; heating to 480 +/-5 ℃, and carrying out temperature equalization for 40 min; heating to 680 + -5 deg.C, and keeping the temperature for 40 min; heating to 780 +/-5 ℃, and carrying out uniform temperature for 40 min; heating to 850 + -5 deg.C, and keeping the temperature for 40 min; raising the temperature to 960 ℃, reaching the carburizing process temperature, and entering the carburizing stage.
In the carburizing stage, the furnace pressure is controlled to be 820-850 Pa, acetylene gas is introduced in the strong penetration stage for 20 seconds and then nitrogen is introduced for 40 seconds to form a carburizing pulse period, the whole strong penetration stage consists of 5 carburizing pulse periods, and nitrogen is used for exhausting waste gas generated in the furnace in the strong penetration stage.
In the quenching stage, the quenching treatment is carried out by adopting the existing vacuum high-pressure gas quenching mode.
[ example 3]
The vacuum low-pressure carburizing process for the shaft-gear part in the embodiment also takes an input shaft-gear part of a speed reducer of an industrial robot shown in fig. 1 as an example, and the basic process flow is the same as that in embodiment 1, except that:
in the temperature rise stage, controlling the vacuum degree in the furnace to be less than 1Pa, sequentially raising the temperature of the workpiece to 300 +/-5 ℃, and carrying out temperature equalization for 30 min; heating to 480 +/-5 ℃, and carrying out temperature equalization for 30 min; heating to 680 + -5 deg.C, and homogenizing for 30 min; heating to 780 +/-5 ℃, and carrying out temperature equalization for 30 min; heating to 850 + -5 deg.C, and homogenizing for 30 min; heating to 950 deg.c to reach the carburizing temperature and entering the carburizing stage.
In the carburizing stage, the furnace pressure is controlled to be 850-880 Pa, acetylene gas is introduced in the strong penetration stage for 10 seconds and then nitrogen is introduced for 20 seconds to form a carburizing pulse period, the whole strong penetration stage consists of 5 carburizing pulse periods, and nitrogen is used for exhausting waste gas generated in the furnace in the strong penetration stage.
In the quenching stage, isothermal quenching oil is adopted for quenching treatment.
The vacuum low-pressure carburizing process for the shaft-gear parts effectively solves the problem of distortion in the carburizing process of the shaft-gear parts. Referring to the experimental comparison in the following table, the first set of data is the test data after treatment with the atmosphere carburizing process (the atmosphere carburizing process is referred to as the carburizing and quenching process in patent No. ZL 201610711836.1), and the second set of data is the test data after treatment with the vacuum low-pressure carburizing process of example 1 of the present invention. And (4) sampling and inspecting the heat-treated shaft tooth part by adopting a 9-point test method, wherein specific sampling positions refer to an azimuth chart shown in fig. 4.
In addition, the surface internal oxidation depth of the carburized layer in the existing atmosphere carburization process is 0.005-0.015 mm, and the surface of the carburized layer in the vacuum low-pressure carburization process has no internal oxidation.
Through the comparison and detection of the different processes, the vacuum low-pressure carburization process for the shaft-tooth parts has the advantages that under the condition that the effective hardened layer depth and the surface hardness are the same as those of the existing atmosphere carburization process, the tooth form distortion of the parts is smaller and lower than the lower limit of the technical requirement of the tooth form distortion of the parts, the surface of the carburized layer is not internally oxidized, and the surface carburization effect of the shaft-tooth parts is improved.
According to the vacuum low-pressure carburizing process for the shaft-gear parts, the temperature is raised to the carburizing process temperature in a stepped temperature raising and preserving mode, so that the processing stress of the shaft-gear parts can be eliminated, the deformation of the parts in the heating process is reduced, the carburizing deformation of the shaft-gear parts reaches 0.005-0.015 mm, and the problem of tooth profile distortion generated in the carburizing process of the shaft-gear parts is effectively solved; in addition, in the vacuum low-pressure strong infiltration stage, acetylene-nitrogen alternate pulses are used as a carburizing atmosphere, and waste gas generated in the furnace is exhausted by using nitrogen, so that the depth of an effective carburized layer and the surface carbon content are more accurately controlled, and the surface carburization effect of the shaft-gear parts is improved.
The present invention and its embodiments have been described above schematically, without limitation, and what is shown in the drawings is only one of the embodiments of the present invention, and the actual structure is not limited thereto. Therefore, if the person skilled in the art receives the teaching, without departing from the spirit of the invention, the person skilled in the art shall not inventively design the similar structural modes and embodiments to the technical solution, but shall fall within the scope of the invention.
Claims (7)
1. The vacuum low-pressure carburizing process for the shaft gear parts sequentially comprises a temperature rising stage, a carburizing stage and a quenching stage, and is characterized in that:
the temperature rise stage adopts a stepped temperature rise and preservation process, and the specific process is as follows:
heating the workpiece to 300 +/-5 ℃, and carrying out uniform temperature for 20-40 min;
heating the workpiece to 480 +/-5 ℃, and carrying out uniform temperature for 20-40 min;
heating the workpiece to 680 +/-5 ℃, and carrying out uniform temperature for 20-40 min;
heating the workpiece to 780 +/-5 ℃, and carrying out uniform temperature for 20-40 min;
heating the workpiece to 850 +/-5 ℃, and carrying out uniform temperature for 20-40 min;
heating the workpiece to 950-1020 ℃ and entering a carburizing stage;
the carburizing stage comprises a strong carburizing stage and a diffusion stage, wherein the strong carburizing stage adopts a pulse type carburizing process, and acetylene-nitrogen alternate pulses are used as carburizing atmosphere in a vacuum pumping state, and acetylene gas and nitrogen are alternately introduced; after the strong cementation stage is finished, maintaining the temperature of the carburization process to enter a diffusion stage;
and entering a quenching stage after the diffusion stage is completed.
2. The vacuum low-pressure carburizing process for the shaft and gear parts according to claim 1, characterized in that: in the strong penetration stage, acetylene gas is introduced for keeping for 2-20 seconds, then nitrogen is introduced for 5-40 seconds to form a carburization pulse period, and the whole strong penetration stage consists of a plurality of carburization pulse periods.
3. The vacuum low-pressure carburizing process for the shaft and gear parts according to claim 2, characterized in that: the strong cementation stage consists of 5 cementation pulse cycles.
4. The vacuum low-pressure carburizing process for the shaft and gear parts according to claim 1, characterized in that: and the furnace pressure in the carburizing stage is controlled to be 550-900 Pa.
5. The vacuum low-pressure carburizing process for the shaft and gear parts according to claim 1, characterized in that: the vacuum degree in the temperature rise stage is controlled to be less than 1 Pa.
6. The vacuum low-pressure carburizing process for the shaft and gear parts according to claim 1, characterized in that: and in the quenching stage, quenching treatment is carried out in a vacuum high-pressure gas quenching or oil quenching mode.
7. The vacuum low-pressure carburizing process for the shaft and gear parts according to claim 6, characterized in that: the quenching temperature in the quenching stage is 830 +/-5 ℃, the vacuum isothermal quenching oil at 135 +/-5 ℃ is adopted for quenching, and the low-speed stirring is carried out at the frequency of 15 Hz.
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004115893A (en) * | 2002-09-27 | 2004-04-15 | Chugai Ro Co Ltd | Vacuum carburizing method |
| JP2016033243A (en) * | 2014-07-31 | 2016-03-10 | トヨタ自動車株式会社 | Carburization treatment method and carburization treatment device of steel material |
| CN106756752A (en) * | 2016-11-15 | 2017-05-31 | 上海先越冶金技术股份有限公司 | A kind of low-pressure vacuum carburization technique |
| CN109321867A (en) * | 2017-07-31 | 2019-02-12 | 东北大学 | A kind of 16Cr3NiWMoVNbE steel vacuum low-pressure carburization technique |
| CN109609893A (en) * | 2019-01-22 | 2019-04-12 | 北京机电研究所有限公司 | A kind of method of thinning microstructure after vacuum carburization |
| CN109735795A (en) * | 2019-03-08 | 2019-05-10 | 东北大学 | A kind of 16Cr3NiWMoVNbE material low-pressure vacuum carburization heat treatment method |
| CN113737125A (en) * | 2021-09-09 | 2021-12-03 | 北京机电研究所有限公司 | Vacuum carburization method for obtaining dispersed fine carbides |
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- 2021-12-31 CN CN202111675718.7A patent/CN114293138B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004115893A (en) * | 2002-09-27 | 2004-04-15 | Chugai Ro Co Ltd | Vacuum carburizing method |
| JP2016033243A (en) * | 2014-07-31 | 2016-03-10 | トヨタ自動車株式会社 | Carburization treatment method and carburization treatment device of steel material |
| CN106756752A (en) * | 2016-11-15 | 2017-05-31 | 上海先越冶金技术股份有限公司 | A kind of low-pressure vacuum carburization technique |
| CN109321867A (en) * | 2017-07-31 | 2019-02-12 | 东北大学 | A kind of 16Cr3NiWMoVNbE steel vacuum low-pressure carburization technique |
| CN109609893A (en) * | 2019-01-22 | 2019-04-12 | 北京机电研究所有限公司 | A kind of method of thinning microstructure after vacuum carburization |
| CN109735795A (en) * | 2019-03-08 | 2019-05-10 | 东北大学 | A kind of 16Cr3NiWMoVNbE material low-pressure vacuum carburization heat treatment method |
| CN113737125A (en) * | 2021-09-09 | 2021-12-03 | 北京机电研究所有限公司 | Vacuum carburization method for obtaining dispersed fine carbides |
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