CN1730677A - Small-sized multipurpose single-chamber vacuum water quenching furnace - Google Patents
Small-sized multipurpose single-chamber vacuum water quenching furnace Download PDFInfo
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- CN1730677A CN1730677A CN 200510021231 CN200510021231A CN1730677A CN 1730677 A CN1730677 A CN 1730677A CN 200510021231 CN200510021231 CN 200510021231 CN 200510021231 A CN200510021231 A CN 200510021231A CN 1730677 A CN1730677 A CN 1730677A
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- 238000010791 quenching Methods 0.000 title claims abstract description 53
- 230000000171 quenching effect Effects 0.000 title claims abstract description 50
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 50
- 238000001816 cooling Methods 0.000 claims abstract description 12
- 239000000463 material Substances 0.000 claims description 14
- 239000012774 insulation material Substances 0.000 claims description 8
- 238000009413 insulation Methods 0.000 claims description 6
- 230000008878 coupling Effects 0.000 claims description 4
- 238000010168 coupling process Methods 0.000 claims description 4
- 238000005859 coupling reaction Methods 0.000 claims description 4
- 238000007789 sealing Methods 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 abstract description 20
- 239000007788 liquid Substances 0.000 abstract description 7
- 239000011261 inert gas Substances 0.000 abstract 1
- 238000000034 method Methods 0.000 description 5
- 229910045601 alloy Inorganic materials 0.000 description 3
- 239000000956 alloy Substances 0.000 description 3
- 229910000881 Cu alloy Inorganic materials 0.000 description 2
- 239000002826 coolant Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 229910000851 Alloy steel Inorganic materials 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 229910001315 Tool steel Inorganic materials 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 238000003483 aging Methods 0.000 description 1
- 238000000137 annealing Methods 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000009730 filament winding Methods 0.000 description 1
- 229910000734 martensite Inorganic materials 0.000 description 1
- 230000009347 mechanical transmission Effects 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000005496 tempering Methods 0.000 description 1
- 239000003643 water by type Substances 0.000 description 1
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Abstract
The invention discloses a small-sized multipurpose single-chamber vacuum water quenching furnace, which comprises a furnace body, a furnace body bracket, a trolley and a water tank which are matched, wherein a furnace door is submerged under the liquid level in the movable trolley water tank by rotating the furnace body ninety degrees, meanwhile, inert gas is filled into the furnace, the furnace chamber is converted from negative pressure to positive pressure to open the furnace door automatically, so that parts needing quenching and cooling in the furnace are quenched into water within one second, the purpose of rapid quenching is achieved, and the problem of rapid transfer of quenching in the field of vacuum heat treatment is solved. The invention has simple structure, low power, low cost and easy operation.
Description
Technical field
The invention belongs to and be used to the vacuum heat treatment equipment field of heating, quenching, be specifically related to a kind of small-sized multipurpose single-chamber vacuum water quenching oven.
Background technology
Present existing vacuum hardening equipment generally is divided into single chamber high-pressure gas quenching furnace and two chamber oil or shrend stove.High-pressure gas quenching furnace not only system complex, costliness and air cooling speed also can't be compared with water-cooled speed.And be the vacuum hardening equipment of quenchant with liquid, because the special conditions of technology and quenching is limit, it all is the double-chamber vacuum quenching apparatus, promptly earlier at the heating chamber internal heating, restarting the heat insulation gate of intermediary when needing to quench after heat tracing finishes picks out part by mechanical transmission, make part fall into oil groove or tank by hoisting appliance again, thereby reach the purpose of vacuum hardening.The problem that this kind equipment exists is:
One, it can oxidation in heating and the process that quench to shift in order to prevent part, need remain under the vacuum state, so it needs two cover vacuum systems, and to keep the vacuum tightness of its heating chamber and cooling room respectively, structure is complicated.
Two, technically with purposes on, the quenching of double-chamber vacuum quenching furnance transfer time generally will be above 15 seconds, and for the less yielding carbon of a big chunk size just, the purpose of part vacuum water-cooled such as low alloy steel, copper alloy and smallclothes alloy tool steel or oil cooling is to make part with transport velocity that is exceedingly fast and the speed of cooling that is exceedingly fast, part is cooled off to obtain quenched martensite tissue or (with copper alloy) greater than its critical cooling velocity with (steel part) obtains the abundant oversaturated body that holds admittedly to bring into play the alloy optimal mechanical properties.Therefore for little and thin part, the double-chamber vacuum quenching furnance does not reach the requirement of quenching transport velocity far away.
Three, the system of double-chamber vacuum quenching furnance is many and complicated, and water, electric energy consumption are all very big, and not only the maintaining input is many, cost is high, and failure rate is also higher.
WZSC series double-chamber vacuum water quenching oven as Beijing Electromechanical Research Inst's development, though quenching workpiece transfer time can≤15 seconds, do not reach quenching effect for little and thin part, and heating and cooling adopt still two to overlap independently vacuum system, bulky, structure is complicated, cost is high.
Summary of the invention
For the quenching workpiece transport velocity that overcomes vacuum hardening equipment in the prior art is slow, complicated, the bulky deficiency of equipment, the invention provides a kind ofly can shorten the transfer time of quenching, simple in structure, small-sized multipurpose single-chamber vacuum water quenching oven that volume is little.It can make under the vacuum state quenching workpiece after the heating shorten to a second transfer time.
The present invention realizes like this, a kind of small-sized multipurpose single-chamber vacuum water quenching oven of the present invention, comprise the main support furnace body support of body of heater, body of heater and the supporting dolly that tank is housed, characteristics are, body of heater contains electric stove wire, adiabator layer, insulation material layer, water jacket, thermopair, draws the material silk, and furnace body support contains front support stand and rear support stand; One end port sealing of body of heater, the another port is provided with fire door and fire door hook, and fire door one end cover hangs in the fire door hook; The sealed port of body of heater is provided with thermocouple interface and sealed screw, and the Thermal couple casing pipe that thermopair is housed is fixedly installed on by the thermocouple interface in the furnace chamber of body of heater, and the external temperature control instrument of the other end of thermopair is so that reach the temperature of required control in the body of heater.Be used for heat insulation baffle plate and pass Thermal couple casing pipe and be arranged in the furnace chamber, by sealed screw be provided with can come and go pulling draw the material silk; Also be provided with vacuum orifice near on the body of heater of sealed port; The central part of body of heater is set with heat-resistant tile, and two ends are provided with the water jacket that is connected by water cooling tube, can completely cut off heat behind the logical water coolant of water jacket, and heat is transmitted to the body of heater two ends.Be disposed with electric stove wire, insulation material layer and adiabator layer on the heat-resistant tile aspect from inside to outside, adiabator layer is outward the body of heater shell.The central part of body of heater shell is provided with the steering shaft with the furnace body support coupling, and body of heater is connected with furnace body support by steering shaft; With also be connected with deflecting roller on the steering shaft that the front support stand of furnace body support is connected; The supporting dolly that tank is housed is arranged on the below of body of heater, and between the front support stand and rear support stand of furnace body support.
Between baffle plate and the furnace chamber internal diameter fixed gap is arranged, be convenient to vacuumize in the furnace chamber.One section that draws material silk in stove, the other end is outside stove, effect is the falling velocity of workpiece when the charging basket that workpiece is housed is drawn in heating zone in the stove and control and quenched.
The external vacuum pump of vacuum orifice makes the vacuum tightness that reaches certain in the furnace chamber so that not oxidized during the workpiece heating in the furnace chamber.
The circuit filament winding is on the heat-resistant tile aspect, and the external temperature control system in two ends is realized the heating to body of heater.Insulation material layer and adiabator layer be arranged on the circuit silk above, the body of heater shell is installed outside again to guarantee in the stove temperature and rise rapidly and not make heat radiation too fast.The fire door of body of heater hook be for body of heater rotate 90 degree fire doors submerge quench in the hardening liquid after, fire door can be opened automatically but can not fall in the tank of hardening liquid and be provided with.
Small-sized multipurpose single-chamber vacuum water quenching oven of the present invention also can carry out vacuum annealing, tempering and ageing treatment to workpiece.
The working process of small-sized multipurpose single-chamber vacuum water quenching oven of the present invention is: after part heating and insulation end, by deflecting roller body of heater is rotated 90 degree, the fire door of body of heater is submerged be located at below the water surface (or liquid level) in the tank of body of heater below, charge into rare gas element by vacuum orifice to body of heater, make in the furnace chamber transfer malleation to by negative pressure after fire door open automatically, be totally released sealed screw this moment, the charging basket that part is housed just at a terrific speed (in the second) in the furnace chamber heating zone, fall into the water (or oil) of supporting dolly and reach the purpose of quenching.
Small-sized multipurpose single-chamber vacuum water quenching oven of the present invention, only single chamber vacuum furnace need be set can reach workpiece falls into liquid rapidly from furnace chamber internal heating district purpose, the workpiece quenching is few transfer time, has solved the difficult problem that the vacuum hardening in the vacuum heat treatment field is shifted fast.Small-sized multipurpose single-chamber vacuum water quenching oven of the present invention makes workpiece keep bright and clean original surface of alloy and best mechanical property after quenching.Of the present invention simple in structure, power is little, cost is low, easy handling.
Below in conjunction with accompanying drawing small-sized multipurpose single-chamber vacuum water quenching oven of the present invention is described further.
Description of drawings
Fig. 1 is the main TV structure synoptic diagram of small-sized multipurpose single-chamber vacuum water quenching oven embodiment of the present invention
Fig. 2 is the cross-sectional view of small-sized multipurpose single-chamber vacuum water quenching oven embodiment of the present invention
Fig. 3 is for rotating 90 view of fire door being submerged when spending and quenching in the tank when body of heater among the small-sized multipurpose single-chamber vacuum water quenching oven embodiment of the present invention
Among the figure, 1. charging basket 2. baffle plates 3. sealed screws 4. draw material silk 5. thermocouple interfaces 6. vacuum orifices 7. water jackets 8. thermopairs 9. water cooling tubes 10. adiabator layers 11. insulation material layers 12. shells 13. electric stove wires 14. furnace chambers 15. fire doors to link up with 16 fire doors, 17. bodies of heater, 18. burner tile 19. front support stands, 20. deflecting roller steering shafts (21,31), 22. waters surface, 23. tanks, 24. dollies, 29. rear support stands
Among the figure, small-sized multipurpose single-chamber vacuum water quenching oven of the present invention comprises body of heater 17, furnace body support and the supporting dolly that tank 23 is housed 24.
Body of heater 17 contains electric stove wire 13, adiabator layer 10, insulation material layer 11, water jacket 7, thermopair 8, draws material silk 4, and furnace body support comprises front support stand 19 and rear support stand 29.Body of heater 17 is a hollow cylinder, the left port sealing of body of heater 17, and right output port is provided with fire door 16 and fire door hook 15.The left sealed port of body of heater 17 is provided with thermocouple interface 5 and sealed screw 3, and the Thermal couple casing pipe that thermopair 8 is housed is fixed in the body of heater 17 by thermocouple interface 5, and the external temperature control instrument of the other end of thermopair 8 is so that reach the temperature of required control in the body of heater 17.Be used for heat insulation baffle plate 2 and pass Thermal couple casing pipe and be arranged in the furnace chamber 14, between baffle plate 2 and furnace chamber 14 internal diameters fixed gap is arranged.By sealed screw 3 be provided with can come and go pulling draw material silk 4, an end that draws material silk 4 is outside stove, the other end is in furnace chamber 14, its effect is that the falling velocity of working when the charging basket of workpiece 1 is drawn in position, heating zone in the furnace chamber 14 and control hardening is housed.Near also being provided with vacuum orifice 6 on the body of heater 17 of left port, vacuum orifice 6 external vacuum pumps make and reach certain vacuum tightness in the furnace chamber 14 so that not oxidized during the workpiece heating in the stove.
The fire door 16 1 end covers of body of heater 17 right output port hang in the fire door hook 15.
The two ends of body of heater 17 are provided with the water jacket 7 that is connected by water cooling tube 9, can completely cut off heat behind the water jacket 7 logical water coolants, and heat is transmitted to body of heater 17 two ends.
The central part of body of heater 17 is set with heat-resistant tile 18, and electric stove wire 13 is wound on heat-resistant tile 18 aspects, and the external temperature controlling system in two ends, the skin of circuit silk 13 are provided with the shell 12 of insulation material layer 11 and adiabator layer 10 and body of heater successively.
The central part of the shell 12 of body of heater is provided with the steering shaft (21,31) with the furnace body support coupling.
Furnace body support is the main support of body of heater 17, and the front and back bracing frame of furnace body support (19,29) is provided with the steering shaft centre hole with body of heater 17 couplings, and furnace body support steering shaft centre hole is connected with the steering shaft (21,31) of body of heater 17, and supports body of heater 17.With also be connected with deflecting roller 20 on the steering shaft 21 that front support stand 19 is connected, one end of steering shaft 21 is fixed on the body of heater shell, the centre hole of the other end and deflecting roller 20 is connected, and controls the rotation of body of heater 17 between back and front supporting frame (19,29) by the rotation of control deflecting roller 20.
The supporting dolly that tank 23 is housed 24 is located at the below of body of heater 17, and between front support stand 19 and rear support stand 29, the position-adjustable of dolly 24 moves, and makes body of heater 17 turn to 90 degree back fire doors 16 just to submerge in the tank 23 of dolly 24.
The total power of small-sized multipurpose single-chamber vacuum water quenching oven of the present invention is 5KW.
The concrete making processes of small-sized multipurpose single-chamber vacuum water quenching oven of the present invention is as follows:
Heat-resistant tile 18 is enclosed within the manufactured water jacket 7 that is provided with, vacuumize interface 6, thermocouple interface 5, sealed screw 3, the central part of the body of heater 17 of baffle plate 2, vacuumize interface 6 external vacuum pumps, insert thermopair 8 from thermocouple interface 5, the external temperature control instrument of the other end of thermopair 8, on the aspect of heat-resistant tile 18 around on electric stove wire 13, and reserve the external temperature controlling system of two ends, use lagging material 11 successively, after lagging material 10 carries out fine and closely woven parcel colligation, buckle shell 12, connect water cooling tube 9, then the charging basket 1 that processes is placed the central part of furnace chamber 14 by drawing material silk 4, fire door hook 15 is installed on the manufactured screw of body of heater right side stove gate, fire door 16 is hung on the fire door hook 15 again.The body of heater of assembling and connect 17 is placed on the front support stand 19 and rear support stand 29 of body of heater 17 by the steering shaft (21,31) that is fixed on body of heater shell 12 medium positions, again deflecting roller 20 is connected on the steering shaft 21, the last dolly 24 that tank 23 will be housed again is arranged on body of heater below correct position, make body of heater 17 rotate 90 ° after stove gate just submerge the water surface in the tank 23 below 22.
The concrete working process of small-sized multipurpose single-chamber vacuum water quenching oven of the present invention is as follows:
After part heating and insulation end, rotational fixation is at the deflecting roller 20 in the centre of body of heater shell 12, with the body of heater 17 Xiang Jiushi degree of turning right, make fire door 16 submerge the water surface in the tank 23 below 22, charge into rare gas element by vacuum orifice 6, make in the furnace chamber 14 transfer malleation to by negative pressure after fire door 16 open automatically, be totally released sealed screw 3 this moment, and the charging basket 1 that part then is housed is understood at a terrific speed the purpose that falls into the water of tanks 23 in the dolly 24 in (in the second) heating zone from furnace chamber 14 and reach quenching.
Use small-sized multipurpose single-chamber vacuum water quenching oven of the present invention to carry out quench treatment situation such as table 1 different quenched materials.
The different quenched materials quenching of table 1 situation synopsis
In the tank of the supporting dolly among the present invention, can add entry, oil or other hardening liquid respectively according to the requirement of quenching workpiece.
Claims (5)
1. small-sized multipurpose single-chamber vacuum water quenching oven, comprise body of heater, furnace body support and the supporting dolly that tank is housed, it is characterized in that: body of heater (17) contains electric stove wire (13), adiabator layer (10), insulation material layer (11), water jacket (7), thermopair (8), draws material silk (4); Furnace body support contains front support stand (19) and rear support stand (20); The port sealing of one end of body of heater (17), another port do not have fire door (16) and fire door hook (15), and fire door (16) one end covers hang in the fire door hook (15); The sealed port of body of heater (17) is provided with thermocouple interface (5) and sealed screw (3), and the Thermal couple casing pipe that thermopair (8) is housed is fixedly installed in the furnace chamber (14) of body of heater (17) by thermocouple interface (5); Be used for heat insulation baffle plate (2) and pass Thermal couple casing pipe and be arranged in the furnace chamber (14), by sealed screw (3) be provided with can come and go pulling draw material silk (4); Also be provided with vacuum orifice (6) near on the body of heater (17) of sealed port; The central part of body of heater (17) is set with heat-resistant tile (18), and two ends are provided with the water jacket (7) that is connected by water cooling tube (9); Be disposed with electric stove wire (13), insulation material layer (11) and adiabator layer (10) on heat-resistant tile (18) aspect from inside to outside, adiabator layer (10) is outer to be body of heater shell (12); The central part of body of heater shell (12) is provided with the steering shaft (21,22) with the furnace body support coupling, and body of heater (17) is connected with furnace body support by steering shaft (21,22); With also be connected with deflecting roller (20) on the steering shaft (21) that the front support stand (19) of furnace body support is connected; Supporting dolly (24) is arranged on the below of body of heater (17).
2. small-sized multipurpose single-chamber vacuum water quenching oven according to claim 1 is characterized in that: the external temperature control instrument of the other end of described thermopair (8).
3. small-sized multipurpose single-chamber vacuum water quenching oven according to claim 1 is characterized in that: between described baffle plate (2) and furnace chamber (14) internal diameter fixed gap is arranged.
4. small-sized multipurpose single-chamber vacuum water quenching oven according to claim 1 is characterized in that: the external vacuum pump of described vacuum orifice (6).
5. small-sized multipurpose single-chamber vacuum water quenching oven according to claim 1 is characterized in that: described circuit silk (13) is wound on heat-resistant tile (18) aspect, the external temperature control system in two ends.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100212311A CN1317401C (en) | 2005-07-09 | 2005-07-09 | Small-sized multipurpose single-chamber vacuum water quenching furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100212311A CN1317401C (en) | 2005-07-09 | 2005-07-09 | Small-sized multipurpose single-chamber vacuum water quenching furnace |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1730677A true CN1730677A (en) | 2006-02-08 |
| CN1317401C CN1317401C (en) | 2007-05-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB2005100212311A Expired - Fee Related CN1317401C (en) | 2005-07-09 | 2005-07-09 | Small-sized multipurpose single-chamber vacuum water quenching furnace |
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| CN (1) | CN1317401C (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101967539A (en) * | 2010-11-01 | 2011-02-09 | 北京易利工业炉制造有限公司 | Vertical vacuum water quenching furnace |
| CN103627863A (en) * | 2013-12-13 | 2014-03-12 | 中国电子科技集团公司第二研究所 | Vertical vacuum quenching furnace |
| CN104178603A (en) * | 2013-05-27 | 2014-12-03 | 刘小阳 | Vacuum furnace quenching process |
| CN104178609A (en) * | 2013-05-22 | 2014-12-03 | 刘小阳 | Vacuum furnace |
| CN106244774A (en) * | 2016-09-23 | 2016-12-21 | 昆明理工大学 | A kind of end quenching experimental provision |
| CN106435109A (en) * | 2016-09-23 | 2017-02-22 | 昆明理工大学 | Automatic sample discharging heating furnace |
| CN106636580A (en) * | 2016-12-16 | 2017-05-10 | 昆明理工大学 | Tail end quenching experiment device |
| CN106834631A (en) * | 2017-03-07 | 2017-06-13 | 中国科学院上海光学精密机械研究所 | Vacuum hardening tube furnace and process for quenching |
| CN113008033A (en) * | 2021-03-30 | 2021-06-22 | 江西理工大学 | High-temperature reaction tube furnace capable of accurately controlling temperature and atmosphere and rapidly quenching sample |
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| GB1310093A (en) * | 1971-03-26 | 1973-03-14 | Hayes Inc C I | Vacuum furnaces |
| CN2091440U (en) * | 1991-01-22 | 1991-12-25 | 嘉兴市新丰电瓷厂 | Net belt type bidirection transmission heat treating furnace |
| FR2713322B3 (en) * | 1993-12-06 | 1996-04-12 | Bmi Fours Ind | Vertical vacuum heat treatment oven. |
| JP3498346B2 (en) * | 1994-03-16 | 2004-02-16 | 新潟ファーネス工業株式会社 | Heat treatment equipment |
| DE19644051C2 (en) * | 1996-10-31 | 2000-09-28 | Moebius Hans Heinrich | Process and device for monitoring and determining the value of gas mixtures in nitrocarburizing and nitriding processes in hardening technology |
| DE19919738A1 (en) * | 1999-01-29 | 2000-08-03 | Loi Thermprocess Gmbh | Continuous furnace with a device for quenching workpieces and quenching processes |
| JP3037333B1 (en) * | 1999-07-12 | 2000-04-24 | 中外炉工業株式会社 | Heat treatment equipment for sizing press |
| CN2801803Y (en) * | 2005-07-09 | 2006-08-02 | 中国工程物理研究院电子工程研究所 | Small-sized multipurpose single-chamber vacuum water quenching furnace |
-
2005
- 2005-07-09 CN CNB2005100212311A patent/CN1317401C/en not_active Expired - Fee Related
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101967539A (en) * | 2010-11-01 | 2011-02-09 | 北京易利工业炉制造有限公司 | Vertical vacuum water quenching furnace |
| CN104178609B (en) * | 2013-05-22 | 2016-06-08 | 东莞市禾盛金属科技有限公司 | A kind of vacuum drying oven |
| CN104178609A (en) * | 2013-05-22 | 2014-12-03 | 刘小阳 | Vacuum furnace |
| CN104178603A (en) * | 2013-05-27 | 2014-12-03 | 刘小阳 | Vacuum furnace quenching process |
| CN104178603B (en) * | 2013-05-27 | 2016-04-20 | 东莞市禾盛金属科技有限公司 | A kind of vacuum oven quenching technology |
| CN103627863B (en) * | 2013-12-13 | 2015-01-28 | 中国电子科技集团公司第二研究所 | Vertical vacuum quenching furnace |
| CN103627863A (en) * | 2013-12-13 | 2014-03-12 | 中国电子科技集团公司第二研究所 | Vertical vacuum quenching furnace |
| CN106244774A (en) * | 2016-09-23 | 2016-12-21 | 昆明理工大学 | A kind of end quenching experimental provision |
| CN106435109A (en) * | 2016-09-23 | 2017-02-22 | 昆明理工大学 | Automatic sample discharging heating furnace |
| CN106435109B (en) * | 2016-09-23 | 2018-03-06 | 昆明理工大学 | A kind of automatic sample outlet heating furnace |
| CN106636580A (en) * | 2016-12-16 | 2017-05-10 | 昆明理工大学 | Tail end quenching experiment device |
| CN106834631A (en) * | 2017-03-07 | 2017-06-13 | 中国科学院上海光学精密机械研究所 | Vacuum hardening tube furnace and process for quenching |
| CN113008033A (en) * | 2021-03-30 | 2021-06-22 | 江西理工大学 | High-temperature reaction tube furnace capable of accurately controlling temperature and atmosphere and rapidly quenching sample |
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| CN1317401C (en) | 2007-05-23 |
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Granted publication date: 20070523 Termination date: 20120709 |