CN108642255A - A kind of high-pressure gas quenching furnace flue tube structure that achievable air-flow switches alternatively up and down - Google Patents
A kind of high-pressure gas quenching furnace flue tube structure that achievable air-flow switches alternatively up and down Download PDFInfo
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- CN108642255A CN108642255A CN201810565022.0A CN201810565022A CN108642255A CN 108642255 A CN108642255 A CN 108642255A CN 201810565022 A CN201810565022 A CN 201810565022A CN 108642255 A CN108642255 A CN 108642255A
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- pressure gas
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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
- C21D1/74—Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material
- C21D1/773—Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material under reduced pressure or vacuum
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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
- C21D1/62—Quenching devices
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- Crystallography & Structural Chemistry (AREA)
- Mechanical Engineering (AREA)
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- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Heat Treatment Of Articles (AREA)
Abstract
The invention discloses a kind of high-pressure gas quenching furnace flue tube structures that achievable air-flow switches alternatively up and down, include the outer framework being made of metal cylinder and thermal insulation layer, the heater being made of equally distributed graphite rod, molybdenum edge sealing, the bilateral push-and-pull folding closure door of upper and lower part, guide rail of sealing up a door, upper and lower section load thermocouple, temperature-control heat couple, material platform column and crossbeam etc. using prismatic sealed structure.Thermal insulation layer is made of ceramic fibre, soft carbon felt and hard carbon felt, and equally distributed heater is coordinated to can guarantee temperature uniformity；Upper seal door below is used for the switching in flue heating space and cooling channel passageway；Upper and lower section load thermocouple switches alternatively up and down for controlling air-flow.The flue tube structure advantageously ensures that the uniformity of cooling velocity at workpiece different location during air quenching, and indexs and the uniformity such as structure property, hardness, deflection that can be after lifting workpieces heat treatment reduce deformation.
Description
Technical field
The present invention relates to a kind of vacuum heat treatment furnaces carrying out high pressure gas quenching cooling to workpiece, more particularly to one kind can be achieved
The high-pressure gas quenching furnace flue tube structure that air-flow switches alternatively up and down.
Background technology
Heat treatment is the microscopic structure by changing inside workpiece, or changes the chemical composition of workpiece surface, assigns or changes
The military service performance of kind workpiece, gives full play to a kind of technology of material potential.Vacuum high pressure gas quenching technology uses high pure nitrogen
Or the inert gases such as argon gas are as hardening media, have cleaning, without oil pollution, be not required to follow-up cleaning treatment, quenching intensity is easy
In adjusting control, workpiece deforms the advantages that small, quickly grows in recent years.It is hard that vacuum high pressure gas quenching technique is mainly used for raising workpiece
Degree, wearability and fatigue strength, it has also become the development trend of piece surface intensive treatment, in necks such as aerospace, military project, automobiles
It is used widely in domain.
Workpiece quenching hardness, uniformity of hardness and deformation are that three key technologies of performance evaluation after heat treatment of workpieces refer to
Mark.Quenching hardness can be realized by improving high-pressure gas quenching furnace intensity of cooling；The main influence of uniformity of hardness and deformation because
Element is the consistency of each spot temperature in workspace during heat treatment of workpieces process, especially air quenching, can be equal by improving furnace temperature
Even property improves uniformity coefficient raising heat treatment hardness uniformity and reduction heat-treatment distortion that cooling gas sprays to workpiece.Vacuum
In high-pressure gas quenching furnace design, manufacturing process, distribution of the cooling gas nozzle on flue must as possible uniformly.
Vacuum high pressure gas quenching equipment flue generally use cooling air-flow one-way circulation structure at present, cooling air-flow from side into
Enter inside flue and workpiece carries out heat exchange, absorb workpiece heat, temperature increases, and blows out flue from the other side, is changed with heat exchanger
It is again introduced into flue through wind turbine driving after heat, is so moved in circles, until workpiece is completely cooling.Using one-way circulation flue knot
When structure carries out air quenching, in a cooling cycle period, workspace first contacts and the position intensity of heat exchange of rear contact cooling air-flow
Inconsistent, this can cause the workpiece cooling procedure workspace positions Nei Ge cooling velocity inconsistent, non-uniform temperature, cause workpiece hot
Hardness is uneven after processing, heat-treatment distortion is difficult to control, and influences the mechanical property after heat treatment of workpieces and military service performance.
Invention content
The object of the present invention is to provide a kind of high-pressure gas quenching furnace flue tube structures that achievable air-flow switches alternatively up and down.
The purpose of the present invention is what is be achieved through the following technical solutions：
The present invention is the high-pressure gas quenching furnace flue tube structure that air-flow can be achieved and switch alternatively up and down, which includes
The outer framework of square structure, flue is interior to be equipped with heater, load thermocouple and temperature-control heat couple, and the top of the outer framework is under
Portion is respectively equipped with trepanning, and the both sides of the trepanning are equipped with closure door guide rail, and the closure door guide rail, which is equipped with, seals up a door, under the outer framework
The osseotomy site in portion is equipped with material platform column and material platform crossbeam.
As seen from the above technical solution provided by the invention, achievable cooling air-flow side provided in an embodiment of the present invention
To the high-pressure gas quenching furnace flue tube structure switched alternatively up and down, heating process temperature uniformity and air quenching process can be effectively controlled
Cooling performance.Workpiece tissue, performance and deformation reach design requirement after ensuring heat treatment.
Description of the drawings
Fig. 1 a, Fig. 1 b are respectively the vacuum high pressure gas quenching that achievable air-flow provided in an embodiment of the present invention switches alternatively up and down
The front cross-sectional and side cross sectional views of stove flue tube structure.
Fig. 2 a, Fig. 2 b are respectively the status diagram that the air-flow of the embodiment of the present invention switches alternatively up and down.
In figure：
1. outer framework, 2. heaters, 3. molybdenum edge sealing, seal door below on 4., 5. closure door guide rails, 6. load thermocouples, 7. temperature controls
Thermocouple, 8. material platform columns, 9. material platform crossbeams.
Specific implementation mode
The embodiment of the present invention will be described in further detail below.What is be not described in detail in the embodiment of the present invention is interior
Appearance belongs to the prior art well known to professional and technical personnel in the field.
The high-pressure gas quenching furnace flue tube structure that the achievable air-flow of the present invention switches alternatively up and down, it is preferably specific real
The mode of applying is：
Flue includes the outer framework of square structure, and heater, load thermocouple and temperature-control heat couple are equipped in flue, described
The upper and lower part of outer framework is respectively equipped with trepanning, and the both sides of the trepanning are equipped with closure door guide rail, and the closure door guide rail is equipped with
The osseotomy site of closure door, the outer framework lower part is equipped with material platform column and material platform crossbeam.
The bore size and the cross sectional dimensions of workspace in flue match, and top closure door and lower part closure door are external just
To the air nozzle of air cooling system.
The closure door is driven by the cylinder to be slided along guide rail.
The closure door and the edge of trepanning are equipped with molybdenum edge sealing.
The temperature-control heat couple is set in the middle part of flue, and load thermoelectricity is respectively equipped with above and below the temperature-control heat couple
Even, when being switched over by workspace upper and lower temperature difference, the load thermocouple carries out temperature real-time measurement feedback, when the load
It when thermoelectric is greater than the set value, carries out wind direction alternatively up and down, moves in circles, ensure workpiece in entire High Pressure Gas Quenching Process
Cooling it is uniform.
Core component of the flue as vacuum heat treatment equipment, structure quality not only affect the quality of whole equipment,
Also heat treatment of workpieces performance is directly affected.The spray wind mode that air-flow switches alternatively up and down advantageously ensures that during workpiece air quenching
The uniformity of different parts cooling velocity and temperature in workspace, can lifting workpieces heat treatment after structure property, hardness, deformation
Indexs and the uniformities such as amount.
The high-pressure gas quenching furnace flue tube structure that the achievable air-flow of the present invention switches alternatively up and down, middle thermal insulation layer is by ceramics
Fiber, soft carbon felt and hard carbon felt are combined, and coordinate equally distributed heater, it is ensured that workpiece heat process furnace temperature is uniform
Property；Upper seal door below is used to complete the break-make switching between flue heating space and cooling channel passageway；Workspace upper and lower side load
Thermocouple is used for real-time monitoring area top and the bottom temperature, is switched alternatively up and down with controlling air-flow.Heating process can effectively be controlled
The cooling performance of temperature uniformity and air quenching process.Workpiece tissue, performance and deformation reach design requirement after ensuring heat treatment.
Specific embodiment：
As shown in Fig. 1 a, Fig. 1 b, Fig. 2 a, Fig. 2 b, flue uses square structure, including：By metal cylinder and thermal insulation layer group
At outer framework 1, the heater 2 by being formed along the graphite rod that space uniform is distributed, molybdenum edge sealing 3, upper and lower part bilateral push away
Pull open the compositions such as conjunction closure door 4, closure door guide rail 5, upper and lower section load thermocouple 6, temperature-control heat couple 7, material platform column 8 and crossbeam 9.Its
Middle thermal insulation layer is made of ceramic fibre, soft carbon felt and hard carbon felt, and equally distributed heater 2 is coordinated to can guarantee temperature uniformity；
Upper seal door below 4 is used to complete the break-make switching between flue heating space and cooling channel passageway；Guide rail 5 seal up a door for sealing up and down
Limition orientation during 4 push-and-pull of door；Upper and lower section load thermocouple 6 switches alternatively up and down for controlling air-flow；Temperature-control heat couple 7
Temperature detection control when being heated for flue；Material platform column 8 and material platform crossbeam 9 are used to support workpiece.
Thermal insulation layer on the outer framework 1 is equipped with metal molybdenum edge sealing 3 in top and the bottom opening, and it is high can to resist air quenching process
Pressure gas stream high speed is washed away, and opening carbon felt fiber is avoided to blow off, and causes flue short circuit insulation breakdown, improves flue service life.
The heater 2 draws component by electrode and is connected with heating transformer, and realization is evenly heated.
The bilateral push-and-pull folding closure door 4 of the flue upper and lower part is pushed and pulled by 4 cylinders of the left and right sides respectively drives
It is dynamic, it is slided along closure door guide rail 5, completes the break-make switching between flue heating space and cooling channel passageway.
It is the air nozzle of air cooling system outside the flue upper and lower part closure door 4, with air cooling system gas circulating tube
Road closely connects.
The square frame frame top and the bottom opening is fixed with closure door guide rail 5, has reinforcement and guiding role concurrently.
The section load thermocouple 6 up and down is used for real-time monitoring area upper and lower side temperature, high-pressure gas quenching furnace control
System can switch over wind direction according to the temperature difference of preset upper and lower section load thermocouple, realize cooling air-flow to the upper and lower of workpiece
Alternately compressed air cooling.
The high-pressure gas quenching furnace flue is equipped with temperature-control heat couple 7, and real-time monitoring hearth temperature controls at Vacuum Heat
Manage the execution of technical process.
The material and intensity of the material platform column 8 and material platform crossbeam 9 can meet large span arrangement and volume under the condition of high temperature
Determine bearing capacity demand.
The high-pressure gas quenching furnace flue knot that a kind of achievable cooling air-flow direction of the present invention switches alternatively up and down
Structure advantageously ensures that the uniformity of workpiece different location cooling velocity during air quenching, can lifting workpieces heat treatment after tissue
The indexs such as performance, hardness, deflection and uniformity.
The operation principle of specific embodiment is：
As shown in Figure 1 a, 1 b, in cooling procedure, each gas supply and evacuating valve are closed, and upper seal door below 4 is opened, cooling
Gas is passed through, and high-voltage high-speed gas is carried out strength heat and handed over by from bottom to top (or from top to bottom) perforation workpiece of upper seal door below 4
It changes.When reaching default value between when cooled or loading the temperature difference of thermocouple 6 up and down more than setting value, system will be into promoting the circulation of qi
Flow direction switching.High-voltage high-speed gas carries out strength by from top to bottom (or from bottom to top) perforation workpiece of upper seal door below 4 at this time
Heat exchange.Moving in circles by the above process, it is ensured that workpiece cooling is uniform.When workpiece is cooled to technique initialization temperature
When, air cooling system can be closed, seal door below 4 on flue is closed, high pressure gas in stove is discharged, completes cooling technique process.
4 bore size of closure door and the workspace cross sectional dimensions of upper and lower part match, to ensure that cooling air-flow is opposite
Workspace cools down uniformity without cooling " dead zone ", and to each position in workspace, is become with reducing with increasing workpiece cooling uniformity
Shape.
High-pressure gas quenching furnace control system can carry out wind direction switching according to technique initialization time or workspace upper and lower temperature difference.
When being switched over by workspace upper and lower temperature difference, the load thermocouple 6 by being arranged in workpiece upper and lower ends is surveyed in real time into trip temperature
Amount feedback carries out wind direction alternatively up and down (see Fig. 2 a, Fig. 2 b), recycles past when load thermoelectric is greater than the set value up and down
It is multiple, ensure that cooling of the workpiece in entire High Pressure Gas Quenching Process is uniform.
The large span arrangement of material platform column 8 and material platform crossbeam 9 farthest meets closure door bore size.
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto,
Any one skilled in the art is in the technical scope of present disclosure, the change or replacement that can be readily occurred in,
It should be covered by the protection scope of the present invention.Therefore, protection scope of the present invention should be with the protection model of claims
Subject to enclosing.
Claims (5)
1. a kind of high-pressure gas quenching furnace flue tube structure that achievable air-flow switches alternatively up and down, which is characterized in that flue includes
The outer framework of square structure, flue is interior to be equipped with heater, load thermocouple and temperature-control heat couple, and the top of the outer framework is under
Portion is respectively equipped with trepanning, and the both sides of the trepanning are equipped with closure door guide rail, and the closure door guide rail, which is equipped with, seals up a door, under the outer framework
The osseotomy site in portion is equipped with material platform column and material platform crossbeam.
2. the high-pressure gas quenching furnace flue tube structure that achievable air-flow according to claim 1 switches alternatively up and down, special
Sign is that the bore size and the cross sectional dimensions of workspace in flue match, and top closure door and lower part closure door are external just
To the air nozzle of air cooling system.
3. the high-pressure gas quenching furnace flue tube structure that achievable air-flow according to claim 2 switches alternatively up and down, special
Sign is that the closure door is driven by the cylinder to be slided along guide rail.
4. the high-pressure gas quenching furnace flue tube structure that achievable air-flow according to claim 3 switches alternatively up and down, special
Sign is that the closure door and the edge of trepanning are equipped with molybdenum edge sealing.
5. the high-pressure gas quenching furnace flue tube structure that achievable air-flow according to claim 4 switches alternatively up and down, special
Sign is that the temperature-control heat couple is set in the middle part of flue, and load thermoelectricity is respectively equipped with above and below the temperature-control heat couple
Even, when being switched over by workspace upper and lower temperature difference, the load thermocouple carries out temperature real-time measurement feedback, when the load
It when thermoelectric is greater than the set value, carries out wind direction alternatively up and down, moves in circles, ensure workpiece in entire High Pressure Gas Quenching Process
Cooling it is uniform.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810565022.0A CN108642255B (en) | 2018-06-04 | 2018-06-04 | A kind of high-pressure gas quenching furnace flue tube structure that achievable air-flow switches alternatively up and down |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810565022.0A CN108642255B (en) | 2018-06-04 | 2018-06-04 | A kind of high-pressure gas quenching furnace flue tube structure that achievable air-flow switches alternatively up and down |
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| CN108642255A true CN108642255A (en) | 2018-10-12 |
| CN108642255B CN108642255B (en) | 2019-08-13 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111041168A (en) * | 2019-12-26 | 2020-04-21 | 北京机电研究所有限公司 | Air cooling system for improving cooling uniformity of vertical vacuum high-pressure gas quenching equipment |
| CN111041172A (en) * | 2019-12-26 | 2020-04-21 | 北京机电研究所有限公司 | Air cooling system for horizontal vacuum high-pressure air quenching |
| CN111397361A (en) * | 2020-03-31 | 2020-07-10 | 北京机电研究所有限公司 | Furnace structure of vacuum hydrogen furnace with air cooling function |
| CN114045381A (en) * | 2021-10-13 | 2022-02-15 | 郭旭 | Precise quenching furnace for red copper plate and quenching process thereof |
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| US5121903A (en) * | 1991-03-11 | 1992-06-16 | Vacuum Furnace Systems Corporation | Quenching arrangement for a furnace |
| CN2291418Y (en) * | 1996-07-04 | 1998-09-16 | 董玉顺 | High-pressure, high flow-rate vacuum air-cooled glowing furnace |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111041168A (en) * | 2019-12-26 | 2020-04-21 | 北京机电研究所有限公司 | Air cooling system for improving cooling uniformity of vertical vacuum high-pressure gas quenching equipment |
| CN111041172A (en) * | 2019-12-26 | 2020-04-21 | 北京机电研究所有限公司 | Air cooling system for horizontal vacuum high-pressure air quenching |
| CN111041168B (en) * | 2019-12-26 | 2021-07-16 | 北京机电研究所有限公司 | Air cooling system for improving cooling uniformity of vertical vacuum high-pressure gas quenching equipment |
| CN111397361A (en) * | 2020-03-31 | 2020-07-10 | 北京机电研究所有限公司 | Furnace structure of vacuum hydrogen furnace with air cooling function |
| CN114045381A (en) * | 2021-10-13 | 2022-02-15 | 郭旭 | Precise quenching furnace for red copper plate and quenching process thereof |
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| CN108642255B (en) | 2019-08-13 |
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Address after: 100083 No. 18 clear road, Haidian District, Beijing Patentee after: China National Machinery Institute Group Beijing Electromechanical Research Institute Co.,Ltd. Address before: 100083 No. 18 clear road, Haidian District, Beijing Patentee before: BEIJING Research Institute OF MECHANICAL & ELECTRICAL TECHNOLOGY |