CN101493282B - Rapid temperature-changing vacuum furnace - Google Patents
Rapid temperature-changing vacuum furnace Download PDFInfo
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- CN101493282B CN101493282B CN200810059327.0A CN200810059327A CN101493282B CN 101493282 B CN101493282 B CN 101493282B CN 200810059327 A CN200810059327 A CN 200810059327A CN 101493282 B CN101493282 B CN 101493282B
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- 238000010438 heat treatment Methods 0.000 claims abstract description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 6
- 238000005245 sintering Methods 0.000 claims description 18
- 239000007789 gas Substances 0.000 claims description 10
- 239000012774 insulation material Substances 0.000 claims description 9
- 239000000463 material Substances 0.000 claims description 9
- 238000005086 pumping Methods 0.000 claims description 9
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 8
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 8
- 238000009792 diffusion process Methods 0.000 claims description 5
- 229910052786 argon Inorganic materials 0.000 claims description 4
- 239000001307 helium Substances 0.000 claims description 4
- 229910052734 helium Inorganic materials 0.000 claims description 4
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 claims description 4
- 239000001257 hydrogen Substances 0.000 claims description 4
- 229910052739 hydrogen Inorganic materials 0.000 claims description 4
- 125000004435 hydrogen atom Chemical class [H]* 0.000 claims description 4
- 229910052757 nitrogen Inorganic materials 0.000 claims description 4
- 238000007789 sealing Methods 0.000 claims description 4
- 230000008878 coupling Effects 0.000 claims description 3
- 238000010168 coupling process Methods 0.000 claims description 3
- 238000005859 coupling reaction Methods 0.000 claims description 3
- 239000004744 fabric Substances 0.000 claims description 3
- 230000009467 reduction Effects 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 238000001816 cooling Methods 0.000 abstract description 15
- 230000006872 improvement Effects 0.000 abstract description 4
- 238000010791 quenching Methods 0.000 abstract description 4
- 230000000171 quenching effect Effects 0.000 abstract description 4
- 230000008901 benefit Effects 0.000 abstract description 3
- 230000002035 prolonged effect Effects 0.000 abstract description 3
- 230000000694 effects Effects 0.000 description 7
- 239000000919 ceramic Substances 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 230000005540 biological transmission Effects 0.000 description 4
- 230000007812 deficiency Effects 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000011819 refractory material Substances 0.000 description 2
- 238000001291 vacuum drying Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 230000009970 fire resistant effect Effects 0.000 description 1
- 229910001004 magnetic alloy Inorganic materials 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000005496 tempering Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
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Abstract
A fast temperature variation vacuum furnace mainly comprises a furnace tube and a heating furnace, the furnace tube is divided into a high temperature zone furnace tube and a low temperature zone furnace tube which are connected; the furnace also comprises a device which can realize fast moving on the high temperature zone furnace tube and the low temperature zone furnace tube. The furnace is characterized in that the outer end of the low temperature zone furnace tube is provided with a furnace window cover, the furnace window cover is equipped with a hole, a pull rod and the hole are in dynamic seal coordination, the inner end of the pull rod and a load bearing box or a load bearing board in the furnace tube are directly or indirectly connected and fixed; and the furnace tube is provided with a charging port and a vacuum extract opening. The invention has the advantages of simple equipment, low improvement cost, greatly prolonged service life of the furnace tube compared with adopting high temperature furnace tube water quenching or oil quenching to achieve fast cooling, reduced sinter cost and more practicality.
Description
Technical field
The present invention relates to a kind of vacuum-sintering or heat-treatment furnace, relate to powder metallurgical technology
Background technology
The sintering stage is a part important in the powder metallurgical technique process, and the sintering equipment that is used for inorganic non-metallic pottery or metallic article mainly contains tunnel cave, tube furnace, bell jar stove etc.Sintering process comprises a complete intensification, constant temperature, temperature-fall period usually at least.To some material,, often need one or several tempering stages (cooling heats up again), to obtain more excellent performance as RE permanent magnetic alloy etc.Especially, for some sintering schedules, wish cooling and heat up speed can The faster the better.
For realizing above purpose, existing agglomerating plant roughly adopts following several mode.Furnace chamber is with circulating water cooling system outward, realizes cooling by accelerating heat radiation; Be blown into the lower gas of temperature, the mode that similar gas is quenched; Immerse in cold water or the oil high temperature furnace pipe cold soon.All there is certain shortcoming in these methods, as cooling-down effect inadequately significantly, heat up again after the cooling slow, the complicated improvement cost of device structure is big, chilling is to the deficiencies such as damage in boiler tube life-span.
The patent No. is the sintering furnace that 01206153 and 200520034713 Chinese patent is all reported a kind of multistage warm area structure, and, has the electronic transmission mechanism that can move around at different warm areas, all adopting the boiler tube heating mode, is vertical and documents adopts, the transmission mechanism of the employing pulley that has, the structure more complicated, and between high-temperature region and low-temperature space, there is not the heat-insulation and heat-preservation structure, so, the unreasonable structure practicality.
Summary of the invention
Technical problem to be solved by this invention is in order to overcome existing agglomerating plant in the deficiency aspect the quick changeable temperature, and provide a kind of can so that goods at the rapid temperature-changing vacuum furnace of high-temperature region and low-temperature space fast moving, simultaneously the simplified apparatus structure, reduce cost, make it practical more.
The present invention solves the problems of the technologies described above the technical scheme that is adopted: a kind of rapid temperature-changing vacuum furnace, it mainly comprises boiler tube and heating furnace, boiler tube is divided into high-temperature region boiler tube, low-temperature space boiler tube, the high-temperature region boiler tube is connected with the low-temperature space boiler tube, be implemented in the device of high-temperature region boiler tube and low-temperature space boiler tube fast moving, it is characterized in that: the fast moving device is that low temperature boiler tube outer end is provided with stove window lid, stove window drop cloth is equipped with the hole, pull bar is that movable sealing cooperates with the hole, makes holding in the inner end of pull bar and the boiler tube burn box or load bearing board is connected and fixed directly or indirectly; Boiler tube is furnished with inflation inlet and vacuum pumping opening.
General design, described low-temperature space boiler tube and coupling part reach cryogenic effect outside heating furnace.Vacuum drying oven is divided into high-temperature region and low-temperature space two parts, and two sections boiler tubes can adopt identical materials or different materials to form, as stainless steel and pottery.Adopt the vacuum mounting flange to connect between two sections boiler tubes, in case leak-stopping gas.Low-temperature space boiler tube outside can install water cold sleeve additional, strengthens cooling effect, further enlarges the temperature difference of high low-temperature space.General design, with the temperature difference of described high-temperature region and low-temperature space at 400～1200 ℃.
Two boiler tube junction or transition regions near the high-temperature region, adopt ceramic refractory to cut off, and purpose is the heat transmission of isolated high-temperature region to low-temperature space.Preferred loose porous ceramic film material, the diameter of refractory material should with the boiler tube internal diameter quite or smaller, the long more then effect of heat insulation of the length of refractory material is good more.
Ceramic refractory is connected with load bearing board or sintering box, can be by manually or the control mode of motor, the mobile time was controlled at 3～300 seconds, make sintered article can be between high-temperature region and low-temperature space fast moving.
At last, one or several in described vacuum pumping opening and mechanical pump, lobe pump and the diffusion pump are connected, and make the vacuum in the boiler tube can reach 10Pa or lower.Described inflation inlet feeds one or more mists in nitrogen, argon gas, helium or the hydrogen, is used for atmosphere protection or reduction sintering.
Compared with prior art, the invention has the advantages that: equipment is simple, and improvement cost is low, and for realizing cooling fast, adopts high temperature furnace pipe shrend or oil quenching to compare, and has prolonged the service life of boiler tube greatly, reduces the sintering cost, and is also practical more.
Description of drawings
The overall structure figure of the high-temperature region of Fig. 1 vacuum drying oven of the present invention, low-temperature space, mounting flange and heating furnace;
The structure chart of Fig. 2 low-temperature space boiler tube;
Fig. 3 flame-proof thermal insulation material piece and the connection layout that holds burning box, pull bar.
Fig. 4 vacuum pumping opening, inflation inlet are in the structural representation of high temperature furnace pipe.
The specific embodiment
Embodiment describes in further detail the present invention below in conjunction with accompanying drawing.
Anticipate as shown in the figure, wherein figure number is: valve 1 is used for fixing the stove hatchcover, hole 2 is used for pull bar and moves, with pull bar 3 be movable sealing structure, pull bar 3 is connected with flame-proof thermal insulation material piece 4, pull bar 5 connects flame-proof thermal insulation material piece 4 and holds and burn box 7, and vacuum pumping opening 8 is used to connect mechanical pump, lobe pump or diffusion pump.Inflation inlet 9 is used to feed argon gas, nitrogen, helium or hydrogen, heating furnace 10, ring flange 11, high-temperature region boiler tube 12, low-temperature space boiler tube 13, fast moving device 14.
A kind of rapid temperature-changing vacuum furnace, it mainly comprises boiler tube and heating furnace 10, boiler tube is divided into high-temperature region boiler tube 12, low-temperature space boiler tube 13, high-temperature region boiler tube 12 is connected with low-temperature space boiler tube 13, be implemented in the device 14 of high-temperature region boiler tube and low-temperature space boiler tube fast moving, traditional technology in these and the documents is similar, it is invented crucial part and is: fast moving device 14 is that low temperature boiler tube 13 outer ends are provided with stove window lid, stove window drop cloth is equipped with hole 2, pull bar 3 is that movable sealing cooperates with hole 2, the inner end of pull bar 3 and the burning box 7 that holds in the boiler tube directly are connected and fixed, and boiler tube is furnished with inflation inlet 9 and vacuum pumping opening 8.In vacuum pumping opening 8 and mechanical pump, lobe pump and the diffusion pump one or several are connected, and make the vacuum in the boiler tube can reach 10Pa or lower.Inflation inlet 9 can feed one or more mists in nitrogen, argon gas, helium or the hydrogen, is used for atmosphere protection or reduction sintering.
In order to obtain relative cryogenic effect, low-temperature space boiler tube 13 and coupling part are outside heating furnace 10.High-temperature region boiler tube 12 adopts identical materials or different materials to form as pottery or stainless steel with low-temperature space boiler tube 13, adopts vacuum mounting flange 11 to connect between two sections boiler tubes, in case leak-stopping gas.
In the time of necessary, low-temperature space boiler tube 13 outsides install water cold sleeve additional, and to strengthen cryogenic effect, the temperature difference that makes high-temperature region and low-temperature space is at 400～1200 ℃.
Pull bar 3 is furnished with flame-proof thermal insulation material piece 4 at the transitional region of high-temperature region boiler tube and low-temperature space boiler tube, and it can place and be fixed on the pull bar 3, prevents the heat transmission of high-temperature region to low-temperature space, flame-proof thermal insulation material piece 4 preferred loose porous ceramic film materials.
At last, the device of described fast moving adopts manually or Electric Machine Control, and the mobile time was controlled at 3～300 seconds, reached the fast moving effect.
Certainly, in the examples of implementation, also can adopt load bearing board, the inner end that makes pull bar indirectly with boiler tube in load bearing board be connected and fixed, be connected with the flame-proof thermal insulation material piece earlier as pull bar, and the flame-proof thermal insulation material piece is connected with load bearing board by another pull bar again, structural principle is similar.
Its use is such:
Open hatchcover by valve 1, place sintered article 6, and push away by pull bar 3 and to put near the uniform temperature zone of sintering furnace in sintering box 7.
Close hatchcover, pull bar 3 is 2 exposed portions serve from the hole.Pull bar 3 can adopt and control translational speed manually, perhaps cooperates with stepper motor etc., controls translational speed more accurately.
Open vacuum pumping opening 8, adopt the vacuum that vacuum extractors such as mechanical pump, lobe pump, diffusion pump reach to be needed.Feed inert protective gas or reducing gas from inflation inlet 9.
Open the heating furnace power supply, according to the sintering temperature programming of setting.
When needing fast cooling, extract pull bar 3 out, drive to hold and burn box 7 and move, so that fast cooling to low-temperature space.In the time of need being rapidly heated, advance pull bar 3, drive to hold and burn box 7 and move, so that be rapidly heated to the high-temperature region.
According to the difference of sintered article 6 sintering schedules, but one or many moves back and forth to hold at high-temperature region and low-temperature space and burns box 7.
Close the heating furnace power supply at last, finish the sintering stage of goods.
The present invention compared with prior art, biggest advantage is that equipment is simple, improvement cost is low.With for realizing cooling fast, adopt high temperature furnace pipe shrend or oil quenching to compare, prolonged the service life of boiler tube greatly, reduce the sintering cost.
Because cooling procedure has just been cooled off sintered article 6, has been held small articles such as burning box 7 and ceramic fire resistant insulation material piece 4 fast, the furnace tube temperature of high-temperature region still remains unchanged during cooling, therefore, the present invention needs repeatedly back and forth fast cooling and the goods that are rapidly heated for sintering, reduce the time of waiting for, had very big facility.In addition, the design of this heating and cooling has reduced the high low temperature required energy consumption that moves in circles to a great extent, reciprocal time the more, the energy consumption saving is significantly.
The present invention is described according to embodiment, is appreciated that the personnel that are familiar with this equipment and technology can adopt other forms of the present invention at an easy rate.Therefore think that all equalizations of doing according to interest field of the present invention change and modification, all should belong to covering scope of the present invention.
Claims (9)
1. rapid temperature-changing vacuum furnace, it mainly comprises boiler tube and heating furnace, boiler tube is divided into high-temperature region boiler tube, low-temperature space boiler tube, the high-temperature region boiler tube is connected with the low-temperature space boiler tube, and the fast moving device between high-temperature region boiler tube and low-temperature space boiler tube, it is characterized in that: the fast moving device is that low temperature boiler tube outer end is provided with stove window lid, and stove window drop cloth is equipped with the hole, pull bar is that movable sealing cooperates with the hole, makes holding in the inner end of pull bar and the boiler tube burn box or load bearing board is connected and fixed directly or indirectly; Boiler tube is furnished with inflation inlet and vacuum pumping opening, and described pull bar is furnished with the flame-proof thermal insulation material piece at the transitional region of high-temperature region boiler tube and low-temperature space boiler tube.
2. rapid temperature-changing vacuum furnace according to claim 1 is characterized in that described low-temperature space boiler tube, and the coupling part that the high-temperature region boiler tube is connected with the low-temperature space boiler tube is outside heating furnace.
3. rapid temperature-changing vacuum furnace according to claim 1 and 2 is characterized in that described high-temperature region boiler tube and low-temperature space boiler tube adopt identical materials or different materials to form, and adopt the vacuum flange dish to connect between two sections boiler tubes.
4. rapid temperature-changing vacuum furnace according to claim 3 is characterized in that described high-temperature region boiler tube and low-temperature space boiler tube adopt pottery or stainless steel.
5. rapid temperature-changing vacuum furnace according to claim 3 is characterized in that described low-temperature space boiler tube outside installs water cold sleeve additional.
6. rapid temperature-changing vacuum furnace according to claim 1 and 2 is characterized in that the device of described fast moving adopts manually or Electric Machine Control, and the mobile time was controlled at 3～300 seconds.
7. rapid temperature-changing vacuum furnace according to claim 1 and 2 is characterized in that in described vacuum pumping opening and mechanical pump, lobe pump and the diffusion pump one or several are connected, and make the vacuum in the boiler tube can reach 10Pa or lower.
8. rapid temperature-changing vacuum furnace according to claim 1 and 2 is characterized in that described inflation inlet feeds one or more mists in nitrogen, argon gas, helium or the hydrogen, is used for atmosphere protection or reduction sintering.
9. rapid temperature-changing vacuum furnace according to claim 1 and 2, the temperature difference that it is characterized in that described high-temperature region and low-temperature space is at 400～1200 ℃.
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| Application Number | Priority Date | Filing Date | Title |
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| CN200810059327.0A CN101493282B (en) | 2008-01-23 | 2008-01-23 | Rapid temperature-changing vacuum furnace |
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| CN200810059327.0A CN101493282B (en) | 2008-01-23 | 2008-01-23 | Rapid temperature-changing vacuum furnace |
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| CN101493282A CN101493282A (en) | 2009-07-29 |
| CN101493282B true CN101493282B (en) | 2010-12-15 |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103033044B (en) * | 2012-12-27 | 2015-04-22 | 株洲硬质合金集团有限公司 | Continuous high-temperature carbonization furnace and method for continuously producing coarse-grained carbide powder |
| CN103151248B (en) * | 2013-03-07 | 2016-04-20 | 武汉电信器件有限公司 | The disperser of zinc and method of diffusion thereof during a kind of photodetector makes |
| CN106602482B (en) | 2016-12-29 | 2019-05-03 | 北京金风科创风电设备有限公司 | Dynamic heat dissipating method, the dynamic cooling system of the heat source of building enclosure and its inside |
| CN106655025B (en) * | 2016-12-29 | 2019-10-29 | 北京金风科创风电设备有限公司 | The drive system of dynamic radiating layout in building enclosure |
| CN114608334B (en) * | 2022-03-10 | 2023-06-27 | 江苏乾鹏科技有限公司 | Stepless variable-temperature rapid sintering device, method, terminal and readable storage medium |
| CN114812166A (en) * | 2022-04-28 | 2022-07-29 | 山田新材料集团有限公司 | Sintering furnace for silicon carbide and metal composite material |
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Application publication date: 20090729 Assignee: NINGBO ZHAOBAO MAGNET Co.,Ltd. Assignor: NINGBO INSTITUTE OF MATERIALS TECHNOLOGY & ENGINEERING, CHINESE ACADEMY OF SCIENCES Contract record no.: X2023980030244 Denomination of invention: A fast variable temperature vacuum furnace Granted publication date: 20101215 License type: Common License Record date: 20230109 |
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Application publication date: 20090729 Assignee: ZHEJIANG ZHONGHANG NEW MATERIAL CO.,LTD. Assignor: NINGBO INSTITUTE OF MATERIALS TECHNOLOGY & ENGINEERING, CHINESE ACADEMY OF SCIENCES Contract record no.: X2023980034300 Denomination of invention: A fast temperature changing Vacuum furnace Granted publication date: 20101215 License type: Common License Record date: 20230330 |
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