CN210085508U - High-pressure gas quenching salt bath isothermal quenching three-chamber vacuum furnace - Google Patents
High-pressure gas quenching salt bath isothermal quenching three-chamber vacuum furnace Download PDFInfo
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- CN210085508U CN210085508U CN201920471528.5U CN201920471528U CN210085508U CN 210085508 U CN210085508 U CN 210085508U CN 201920471528 U CN201920471528 U CN 201920471528U CN 210085508 U CN210085508 U CN 210085508U
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- 150000003839 salts Chemical class 0.000 title claims abstract description 142
- 238000010791 quenching Methods 0.000 title claims abstract description 118
- 230000000171 quenching effect Effects 0.000 title claims abstract description 114
- 230000007246 mechanism Effects 0.000 claims abstract description 58
- 238000010438 heat treatment Methods 0.000 claims abstract description 55
- 238000000034 method Methods 0.000 claims abstract description 13
- 230000008569 process Effects 0.000 claims abstract description 12
- 238000012423 maintenance Methods 0.000 claims abstract description 5
- 238000009413 insulation Methods 0.000 claims description 40
- 239000000463 material Substances 0.000 claims description 38
- 238000001816 cooling Methods 0.000 claims description 23
- 238000003756 stirring Methods 0.000 claims description 13
- 229910002651 NO3 Inorganic materials 0.000 claims description 10
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 claims description 10
- 238000005279 austempering Methods 0.000 claims description 9
- 239000012266 salt solution Substances 0.000 claims description 8
- 238000009529 body temperature measurement Methods 0.000 claims description 7
- 238000013016 damping Methods 0.000 claims description 6
- 238000001514 detection method Methods 0.000 claims description 6
- 239000007788 liquid Substances 0.000 claims description 6
- 238000007789 sealing Methods 0.000 claims description 6
- 230000033001 locomotion Effects 0.000 claims description 5
- 230000008859 change Effects 0.000 claims description 3
- 238000005485 electric heating Methods 0.000 claims description 3
- 230000008878 coupling Effects 0.000 claims description 2
- 238000010168 coupling process Methods 0.000 claims description 2
- 238000005859 coupling reaction Methods 0.000 claims description 2
- 229920001973 fluoroelastomer Polymers 0.000 claims description 2
- 238000005286 illumination Methods 0.000 claims description 2
- 229920002379 silicone rubber Polymers 0.000 claims description 2
- 238000004891 communication Methods 0.000 claims 1
- 239000012774 insulation material Substances 0.000 claims 1
- 239000007789 gas Substances 0.000 abstract description 72
- 230000009471 action Effects 0.000 abstract description 4
- 238000005516 engineering process Methods 0.000 abstract description 3
- 239000011261 inert gas Substances 0.000 abstract description 2
- 238000005255 carburizing Methods 0.000 abstract 1
- LPXPTNMVRIOKMN-UHFFFAOYSA-M sodium nitrite Chemical compound [Na+].[O-]N=O LPXPTNMVRIOKMN-UHFFFAOYSA-M 0.000 description 4
- FGIUAXJPYTZDNR-UHFFFAOYSA-N potassium nitrate Chemical compound [K+].[O-][N+]([O-])=O FGIUAXJPYTZDNR-UHFFFAOYSA-N 0.000 description 3
- -1 perfluoro Chemical group 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000003915 air pollution Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 235000010333 potassium nitrate Nutrition 0.000 description 1
- 239000004323 potassium nitrate Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 235000010288 sodium nitrite Nutrition 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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Abstract
The utility model relates to a vacuum heat treatment technology, and provides a high-pressure gas quenching salt bath isothermal quenching three-chamber vacuum furnace. The three-chamber vacuum furnace comprises a gas quenching chamber, a heating chamber and a salt bath chamber; the gas quenching chamber, the heating chamber and the salt bath chamber are connected in sequence; the gas quenching chamber is mainly used for carburizing a heating workpiece in a vacuum or inert gas filled environment, the heating chamber is mainly used for heating or preheating the workpiece, the temperature reaches over 900 ℃, and then the workpiece enters a salt bath chamber for salt bath treatment. The three-chamber mechanism is arranged in a split mode, so that the maintenance is convenient, and the requirements of different heat treatment processes can be met. The horizontal feeding and taking mechanism adopts a double-speed motor to realize stable (slow-fast-slow) action, the starting and stopping speed is high, and the workpiece conveying time is short. The utility model can complete various processes such as vacuum salt bath isothermal quenching, vacuum high-pressure gas quenching, vacuum low-pressure carburization and the like. The main function of the quenching furnace can realize high-pressure gas quenching and salt bath isothermal quenching.
Description
Technical Field
The utility model relates to a vacuum heat treatment technology, in particular to a high-pressure gas quenching salt bath isothermal quenching three-chamber vacuum furnace.
Background
The salt bath furnace is an industrial furnace (capable of heating in a salt solution by a metal electrode) which uses a molten salt solution as a heating medium and immerses a workpiece into the salt solution for heating.
The existing salt bath furnace is a non-vacuum small furnace, a workpiece placed in a heating crucible is small in size and limited in space, only a heating device is arranged in salt liquid, the stirring function is omitted, the prior art is not carried out in a vacuum environment, and volatile substances are generated after the salt liquid is heated to seriously pollute air.
A single furnace type can not carry out multiple processes together, so that some parts with special requirements can not meet the process requirements at one time.
In view of this, the salt bath furnace of the utility model contains three functional chamber areas, can effectually save technology switching time, improves production efficiency, reduces air pollution.
SUMMERY OF THE UTILITY MODEL
The utility model provides a high-pressure gas quenching salt bath isothermal quenching three-chamber vacuum furnace which has the advantages of high heating speed, high heat efficiency, energy saving and consumption reduction.
A high-pressure gas quenching salt bath austempering three-chamber vacuum furnace comprises: the gas quenching chamber, the heating chamber and the salt bath chamber; the gas quenching chamber, the heating chamber and the salt bath chamber are connected in sequence;
the gas quenching chamber comprises a gas quenching air cooling system, a workpiece operation structure, a gas quenching temperature measuring thermocouple, a gas quenching lighting structure, a gas quenching observation window, a safety valve assembly, a vacuum detection gauge pipe, a locking ring cylinder assembly and a furnace door B fixing mechanism; the gas quenching air cooling system and the gas quenching temperature measuring thermocouple are arranged at the upper end of the gas quenching chamber and are matched with each other to control the temperature of the gas quenching chamber; the gas quenching illuminating structure is arranged in the gas quenching chamber and is used for observing the state in the gas quenching chamber to provide a light source; the gas quenching observation window is arranged on a furnace door B at the end of the gas quenching chamber, and the furnace door B is connected with the gas quenching chamber main body through a furnace door B fixing mechanism; the safety valve assembly, the vacuum detection gauge pipe and the locking ring cylinder assembly are uniformly distributed on the gas quenching chamber main body and used for adjusting the pressure in the gas quenching chamber; the workpiece operation structure consists of a horizontal feeding and taking mechanism and a lifting mechanism, the horizontal and vertical motions are driven by a double-speed motor, and the workpieces can stably operate in and out of the gas quenching chamber through a slide wire bearing; the conveying mechanism has simple structure and few actions, so the failure rate is low and the operation and maintenance are simple. And realizing action, wherein the time of the material taking and withdrawing process is less than 15 s.
The heating chamber comprises a middle heat insulation door, a hot chamber shell, a heating chamber temperature measuring component, a frame, a heat insulation layer, a heating element and a material platform; the heating chamber is respectively controlled to be communicated with the gas quenching chamber and the salt bath chamber through middle heat insulation doors arranged at two sides; the middle heat insulation door is of a plug board type and comprises a heat insulation door flashboard, a heat insulation layer, a four-bar mechanism driven by a cylinder, a guide rail and a damping device; a heat insulation layer is arranged in the heat insulation door flashboard, the four-bar mechanism driven by the cylinder controls the heat insulation door flashboard to move up and down along the guide rail, and the damping device is used for reducing the vibration of the heat insulation door flashboard in the movement process;
the salt bath room mainly comprises a salt bath observation window, a salt bath furnace door, a pressure gauge seat structure, a material frame, a grabbing mechanism, a salt bath temperature measurement component, a salt bath stirring mechanism, a salt bath heating element, a salt bath air cooling system, a salt bath tank and a horizontal running mechanism; the salt bath observation window is arranged on the salt bath furnace door A and is used for observing the condition change in the furnace; the salt bath furnace door is arranged on one side of the salt bath room and is circular; the pressure gauge seat structure is used for installing a pressure gauge and measuring the pressure in the salt bath chamber; the material frame is used for installing a workpiece, and the length of the workpiece is generally less than 800 mm; the horizontal running mechanism is used for horizontally conveying the material frame and the workpiece in the three-chamber vacuum furnace; the grabbing mechanism is arranged at the upper end of the salt bath room, can move up and down, and is used for grabbing the material frame and the workpiece to be immersed in salt liquid; the salt bath temperature measurement component is used for detecting the temperature of salt solution through a thermometer and has an alarm function; the salt bath stirring mechanism is arranged at the bottom of the salt bath room and is used for stirring the nitrate in the salt bath room; the temperature uniformity of isothermal quenching is improved, and the quenching quality of the workpiece is improved. The salt bath heating element is arranged in the salt bath tank, and an electric heating radiant tube is adopted to heat the nitrate in the bath tank; the salt bath air cooling system is arranged on the salt bath tank, and a heat exchanger is adopted to cool the salt bath chamber.
Furthermore, the intermediate heat-insulating door and the hot chamber shell both adopt an integral cover heat-insulating frame structure, are made of high-temperature resistant materials Cr25Ni20 welded into a rigid integral outer frame and are paved with heat-insulating materials, and are sealed by a fluororubber ring; and a safety pin is additionally arranged between the middle heat insulation door and the hot chamber shell, and is used during maintenance.
Further, the horizontal telescopic length of the horizontal running mechanism in the salt bath chamber can extend to the gas quenching chamber and is used for conveying or extracting the material frame and the workpiece.
Furthermore, the flange interface of the salt bath tank adopts a perfluoro material sealing ring, the box seat of the material lifting and heat insulation door is sealed by adopting a shaft sealing ring, the position of salt liquid stirring adopts a magnetic coupling sealing device, a magnetic field is utilized to drive the shaft to rotate, and the connecting end is still sealed by perfluoro or silicon rubber.
Further, above-mentioned salt bath forced air cooling system double-deck air cooling type structure, the air inlet sets up in salt bath groove lower part, and the air escape sets up in salt bath groove upper portion, and with gas cooling improves the security, especially to nitrate, the cooling function is indispensable.
According to the using method of the high-pressure gas quenching salt bath isothermal quenching three-chamber vacuum furnace, the conditions and the sequence of workpieces entering a gas quenching chamber, a heating chamber and a salt bath chamber are selected according to specific process requirements; the motion state of the horizontal running mechanism in different process flows is as follows: the horizontal running mechanism conveys or extracts the material frame and the workpiece to the gas quenching chamber, a fork is opened in the heating chamber, the material frame and the workpiece are placed on the material platform and quit the heating chamber, and the middle heat insulation doors on the two sides are closed for heating; after heating, the horizontal running mechanism takes out the material frame and the workpiece to enter a salt bath room, the grabbing mechanism obtains the material frame and the workpiece, a fork of the horizontal running mechanism is opened, and the grabbing mechanism carries the material frame and the workpiece to be immersed in the salt bath below.
The workpiece firstly enters a gas quenching chamber, and inert gas is filled into the gas quenching chamber to be pressurized to the standard atmospheric pressure; then transferring the steel plate into a heating chamber, carrying out high-temperature quenching at the temperature of 870-1050 ℃, and finally entering a salt bath and an isothermal salt bath, wherein the temperature is 180-320 ℃; the mass ratio of the potassium nitrate to the sodium nitrite in the salt bath chamber is 45-55%.
The nitrate can be used for multi-point high-precision temperature measurement and control, and has high heating speed and uniform temperature. The salt bath quenching mechanism of the salt bath chamber can simulate the working condition of the salt bath under the atmospheric pressure. Aiming at the volatile matters of the nitrate, an environment-friendly discharge device is adopted. The special high-temperature coating is resistant to nitrate corrosion.
The utility model has the advantages that: the heating chamber mainly heats or preheats the workpiece to over 900 ℃, and then the workpiece enters a salt bath room for salt bath treatment. The three-chamber mechanism is arranged in a split mode, so that the maintenance is convenient, and the requirements of different heat treatment processes can be met. The horizontal feeding and taking mechanism adopts a double-speed motor to realize stable (slow-fast-slow) action, the starting and stopping speed is high, and the workpiece conveying time is short. The utility model can complete various processes such as vacuum salt bath isothermal quenching, vacuum high-pressure gas quenching, vacuum low-pressure carburization and the like. The main function of the quenching furnace can realize high-pressure gas quenching and salt bath isothermal quenching.
Drawings
FIG. 1 is a schematic front view of a high-pressure gas-quenching salt-bath austempering three-chamber vacuum furnace.
FIG. 2 is a schematic end view of a high-pressure gas-quenching salt-bath austempering three-chamber vacuum furnace.
In the figure: 1 salt bath observation window; 2, a salt bath furnace door A; 3, a locking ring; 4, a pressure gauge seat structure; 5, material frame; 6, a grabbing mechanism; 7 thermal insulation doors; 8 a hot chamber housing; 9 heating the chamber measurement assembly; 10, a gas quenching air cooling system; 11 a workpiece running structure; 12 gas quenching temperature measuring thermocouple; 13 gas quenching lighting structure; 14 gas quenching observation window; 15 a heating chamber; 16 salt bath temperature measurement components; 17 salt bath stirring mechanism; 18 salt bath heating elements; 19 salt bath air cooling system; 20 salt bath; 21 a horizontal running mechanism; 22 a safety valve assembly; 23 vacuum detecting gauge pipe; 24 locking ring cylinder assembly; 25 furnace door B fixing mechanism.
Detailed Description
As shown in fig. 1, a high-pressure gas-quenching salt-bath austempering three-chamber vacuum furnace comprises: the gas quenching chamber, the heating chamber and the salt bath chamber; the gas quenching chamber, the heating chamber and the salt bath chamber are connected in sequence;
the gas quenching chamber comprises a gas quenching air cooling system 10, a workpiece operation structure 11, a gas quenching temperature measuring thermocouple 12, a gas quenching illumination structure 13, a gas quenching observation window 14, a safety valve assembly 22, a vacuum detection gauge pipe 23, a locking ring air cylinder assembly 24 and a furnace door B fixing mechanism 25; the gas quenching air cooling system 10 and the gas quenching temperature measuring thermocouple 12 are arranged at the upper end of the gas quenching chamber and are matched with each other to control the temperature of the gas quenching chamber; the gas quenching illuminating structure 13 is arranged in the gas quenching chamber and is used for observing the state in the gas quenching chamber to provide a light source; the gas quenching observation window 14 is arranged on a furnace door B at the end of the gas quenching chamber, and the furnace door B is connected with the gas quenching chamber main body through a furnace door B fixing mechanism 25; the safety valve assembly 22, the vacuum detection gauge pipe 23 and the locking ring cylinder assembly 24 are uniformly distributed on the gas quenching chamber main body and used for adjusting the pressure in the gas quenching chamber; the workpiece operation structure 11 consists of a horizontal feeding and taking mechanism and a lifting mechanism, and is driven by a double-speed motor to move horizontally and vertically, so that the workpieces can stably operate in an air quenching chamber through a slide wire bearing;
the heating chamber 15 comprises a middle heat insulation door 7, a hot chamber shell 8, a heating chamber temperature measuring component 9, a frame, a heat insulation layer, a heating element and a material platform; the heating chamber is respectively controlled to be communicated with the gas quenching chamber and the salt bath chamber through middle heat insulation doors 7 arranged at two sides; the middle heat insulation door 7 is of a plugboard type and comprises a heat insulation door flashboard, a heat insulation layer, a four-bar mechanism driven by a cylinder, a guide rail and a damping device; a heat insulation layer is arranged in the heat insulation door flashboard, the four-bar mechanism driven by the cylinder controls the heat insulation door flashboard to move up and down along the guide rail, and the damping device is used for reducing the vibration of the heat insulation door flashboard in the movement process;
the salt bath chamber mainly comprises a salt bath observation window 1, a salt bath furnace door A2, a pressure gauge stand structure 4, a material frame 5, a grabbing mechanism 6, a salt bath temperature measurement component 16, a salt bath stirring mechanism 17, a salt bath heating element 18, a salt bath air cooling system 19, a salt bath tank 20 and a horizontal running mechanism 21; the salt bath observation window 1 is arranged on a salt bath furnace door A2 and is used for observing the condition change in the furnace; the salt bath furnace door A2 is arranged on one side of the salt bath room; the pressure gauge seat structure 4 is used for installing a pressure gauge and measuring the pressure in the salt bath chamber; the material frame 5 is used for installing a workpiece; the horizontal running mechanism 21 is used for horizontally conveying the material frame and the workpiece in the three-chamber vacuum furnace; the grabbing mechanism is arranged at the upper end of the salt bath room, can move up and down, and is used for grabbing the material frame and the workpiece to be immersed in salt liquid; the salt bath temperature measuring component 16 is used for detecting the temperature of salt solution through a thermometer and has an alarm function; the salt bath stirring mechanism 17 is arranged at the bottom of the salt bath room and is used for stirring the nitrate in the salt bath room 20; the salt bath heating element 18 is arranged in the salt bath tank, and an electric heating radiant tube is adopted to heat the nitrate in the bath tank; the salt bath air cooling system 19 is arranged on the salt bath, and a heat exchanger is adopted to cool the salt bath chamber.
The material is conveyed to a heating chamber from a gas quenching chamber through a horizontal operation mechanism for heating, the heating chamber is vacuumized and heated to 900 ℃, the heat insulation door of the salt bath chamber is opened by gas backfilling, the material is taken out by a fork opening and combining mechanism and enters the salt bath chamber, and the heat insulation door is closed. Vacuumizing the salt bath, and adding 70% of NaNO2+KNO3The mixture of the salt is put into a medium-temperature salt bath furnace for heating, when the salt bath is heated to the quenching temperature, the material is dropped into the salt bath, meanwhile, a stirrer is slowly started until the constant speed is reached, the stirring time lasts for about 1 hour, the material is isothermally quenched in the salt solution for about 1 hour, the material is lifted to fall on a fork-opening and fork-combining mechanism, the gas in the salt bath chamber is backfilled to open a furnace door, and a skip car outside the furnace takes out the material to complete one-time isothermally quenching; if high-pressure gas quenching is realized, the material is heated from the heating chamber, then the operating mechanism of the gas quenching chamber is taken back to the gas quenching chamber, the air-cooled heat exchange system is started for air cooling, after cooling, the gas is backfilled, the furnace door of the gas quenching chamber is opened, and the material is taken out.
Claims (5)
1. A high-pressure gas quenching salt bath austempering three-chamber vacuum furnace is characterized by comprising: the gas quenching chamber, the heating chamber and the salt bath chamber; the gas quenching chamber, the heating chamber and the salt bath chamber are connected in sequence;
the gas quenching chamber comprises a gas quenching air cooling system (10), a workpiece operation structure (11), a gas quenching temperature measuring thermocouple (12), a gas quenching illumination structure (13), a gas quenching observation window (14), a safety valve assembly (22), a vacuum detection gauge pipe (23), a locking ring air cylinder assembly (24) and a furnace door B fixing mechanism (25); the gas quenching air cooling system (10) and the gas quenching temperature measuring thermocouple (12) are arranged at the upper end of the gas quenching chamber and are matched with each other to control the temperature of the gas quenching chamber; the gas quenching illuminating structure (13) is arranged in the gas quenching chamber and is used for observing the state in the gas quenching chamber to provide a light source; the gas quenching observation window (14) is arranged on a furnace door B at the end of the gas quenching chamber, and the furnace door B is connected with the gas quenching chamber main body through a furnace door B fixing mechanism (25); the safety valve component (22), the vacuum detection gauge pipe (23) and the locking ring cylinder component (24) are uniformly distributed on the gas quenching chamber main body and used for adjusting the pressure in the gas quenching chamber; the workpiece operation structure (11) consists of a horizontal feeding and taking mechanism and a lifting mechanism, and is driven by a double-speed motor to move horizontally and vertically, so that the workpieces can stably operate in an air inlet and outlet quenching chamber through a slide wire bearing;
the heating chamber (15) comprises a middle heat insulation door (7), a hot chamber shell (8), a heating chamber temperature measuring component (9), a frame, a heat insulation layer, a heating element and a material platform; the heating chamber respectively controls the communication state with the gas quenching chamber and the salt bath chamber through middle heat insulation doors (7) arranged at two sides; the middle heat insulation door (7) is of a plugboard type and comprises a heat insulation door flashboard, a heat insulation layer, a four-bar mechanism driven by a cylinder, a guide rail and a damping device; a heat insulation layer is arranged in the heat insulation door flashboard, the four-bar mechanism driven by the cylinder controls the heat insulation door flashboard to move up and down along the guide rail, and the damping device is used for reducing the vibration of the heat insulation door flashboard in the movement process;
the salt bath room mainly comprises a salt bath observation window (1), a salt bath furnace door A (2), a pressure gauge stand structure (4), a material frame (5), a grabbing mechanism (6), a salt bath temperature measurement component (16), a salt bath stirring mechanism (17), a salt bath heating element (18), a salt bath air cooling system (19), a salt bath tank (20) and a horizontal operation mechanism (21); the salt bath observation window (1) is arranged on the salt bath furnace door A (2) and is used for observing the condition change in the furnace; the salt bath furnace door A (2) is arranged on one side of the salt bath room; the pressure gauge seat structure (4) is used for installing a pressure gauge and measuring the pressure in the salt bath chamber; the material frame (5) is used for installing a workpiece; the horizontal running mechanism (21) is used for horizontally conveying the material frame and the workpiece in the three-chamber vacuum furnace; the grabbing mechanism is arranged at the upper end of the salt bath room, can move up and down, and is used for grabbing the material frame and the workpiece to be immersed in salt liquid; the salt bath temperature measurement component (16) is used for detecting the temperature of salt solution through a thermometer and has an alarm function; the salt bath stirring mechanism (17) is arranged at the bottom of the salt bath room and is used for stirring the nitrate in the salt bath room (20); the salt bath heating element (18) is arranged in the salt bath and adopts an electric heating radiant tube to heat the nitrate in the bath; the salt bath air cooling system (19) is arranged on the salt bath, and a heat exchanger is adopted to cool the salt bath chamber.
2. The high-pressure gas quenching salt bath austempering three-chamber vacuum furnace of claim 1, wherein the intermediate heat insulation door (7) and the hot chamber shell (8) both adopt an integral capping heat insulation frame structure, are both made of high-temperature resistant material Cr25Ni20 welded into a rigid integral outer frame, and are paved with heat insulation materials and sealed by fluororubber rings; a safety pin is additionally arranged between the middle heat insulation door (7) and the hot chamber shell (8) and is used during maintenance.
3. A high-pressure gas-quenching salt-bath austempering three-chamber vacuum furnace as claimed in claim 1 or 2, wherein the horizontal extension and retraction length of the horizontal running mechanism (21) in the salt bath chamber can be extended to the gas quenching chamber for conveying or extracting the material frame and the workpiece.
4. The high-pressure gas quenching salt bath austempering three-chamber vacuum furnace of claim 1 or 2, wherein a flange interface of the salt bath (20) is a perfluorinated sealing ring, a box seat of the material lifting and heat insulation door is sealed by a shaft sealing ring, a position where salt solution is stirred is sealed by a magnetic coupling sealing device, a magnetic field is utilized to drive the shaft to rotate, and a connecting end is sealed by perfluorinated or silicon rubber.
5. The high-pressure gas quenching salt bath austempering three-chamber vacuum furnace of claim 1 or 2, wherein the salt bath air cooling system (19) is of a double-layer air cooling type structure, an air inlet is formed in the lower portion of the salt bath, an air escape opening is formed in the upper portion of the salt bath, and safety is improved by air cooling.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920471528.5U CN210085508U (en) | 2019-04-09 | 2019-04-09 | High-pressure gas quenching salt bath isothermal quenching three-chamber vacuum furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920471528.5U CN210085508U (en) | 2019-04-09 | 2019-04-09 | High-pressure gas quenching salt bath isothermal quenching three-chamber vacuum furnace |
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| CN210085508U true CN210085508U (en) | 2020-02-18 |
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| CN201920471528.5U Withdrawn - After Issue CN210085508U (en) | 2019-04-09 | 2019-04-09 | High-pressure gas quenching salt bath isothermal quenching three-chamber vacuum furnace |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110004277A (en) * | 2019-04-09 | 2019-07-12 | 沈阳东博热工科技有限公司 | A kind of high pressure gas quenching salt bath austempering three-chamber vacuum furnace and application method |
| CN111154953A (en) * | 2020-02-21 | 2020-05-15 | 沈阳工业大学 | Heat treatment method for improving comprehensive mechanical property of GCr15 steel |
| CN111197116A (en) * | 2020-02-21 | 2020-05-26 | 赫菲斯热处理系统江苏有限公司 | Movable connecting cabin of salt quenching roller furnace |
-
2019
- 2019-04-09 CN CN201920471528.5U patent/CN210085508U/en not_active Withdrawn - After Issue
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110004277A (en) * | 2019-04-09 | 2019-07-12 | 沈阳东博热工科技有限公司 | A kind of high pressure gas quenching salt bath austempering three-chamber vacuum furnace and application method |
| CN110004277B (en) * | 2019-04-09 | 2024-01-19 | 沈阳东博热工科技有限公司 | Three-chamber vacuum furnace for high-pressure gas quenching salt bath isothermal quenching and use method thereof |
| CN111154953A (en) * | 2020-02-21 | 2020-05-15 | 沈阳工业大学 | Heat treatment method for improving comprehensive mechanical property of GCr15 steel |
| CN111197116A (en) * | 2020-02-21 | 2020-05-26 | 赫菲斯热处理系统江苏有限公司 | Movable connecting cabin of salt quenching roller furnace |
| CN111154953B (en) * | 2020-02-21 | 2021-10-12 | 沈阳工业大学 | Heat treatment method for improving comprehensive mechanical property of GCr15 steel |
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