CN201435834Y - Metal resistance heater - Google Patents
Metal resistance heater Download PDFInfo
- Publication number
- CN201435834Y CN201435834Y CN2009200325900U CN200920032590U CN201435834Y CN 201435834 Y CN201435834 Y CN 201435834Y CN 2009200325900 U CN2009200325900 U CN 2009200325900U CN 200920032590 U CN200920032590 U CN 200920032590U CN 201435834 Y CN201435834 Y CN 201435834Y
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- resistance heating
- thermal conductance
- heating body
- arc heat
- conductance ring
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Abstract
A metal resistance heater is made of refractory metal tungsten. A resistance heating member (5) is composed by combining four arc heating blocks (14) with pi/4 radian each. An upper heat conduction ring (13) is composed of two semicircular rings and is positioned at the top end of the resistance heating member (5). A lower heat conduction ring (15) is annular and is placed at the bottom of the resistance heating member (5). A combination surface between two semicircular upper heat conduction rings (13) is superposed with a combination surface of a certain pair of arc heating blocks (14) in theresistance heating member (5). Two electrodes (12) are respectively placed at the top parts of two semicircular upper heat conduction rings (13). The metal resistance heater provided by the utility model has a low-enough vapor pressure in high temperature and does not pollute a furnace hearth and the workpiece. The heating member can be used in the neutral atmosphere. No electromagnetic referenceis formed in the heating process. The melt flowing in the directional solidification process can be reduced. The metal resistance heater provided by the utility model has the characteristics of highheating temperature, good stability and long service life.
Description
One, technical field
The present invention relates to the manufacture field that solidifies of metal material, specifically is a kind of metallic resistor heating device.
Two, background technology
Directional solidification technique has important use at aspects such as advanced configuration such as high temperature alloy, magnetic material, composite material and functional materials.The control of hot-fluid is the important step in the directional solidification technique, and obtaining and keeping unidirectional hot-fluid is the important assurance of directional solidification success.Strengthening and keep heating efficiency preferably, is one of necessary condition that obtains high-temperature gradient.
Mode of heating commonly used has the coil induction heating, coil-inducedly adds graphite cannula heating, resistance heating in the directional solidification technique, area electron beam is molten and laser zone is molten etc.The rate of heat addition of coil-induced heating is very fast, but its magnetic field eddy current can cause the stronger convection current of the inner formation of material melt, and unfavorable to the stable growth of tissue, the back adds graphite cannula and reduces eddy current, but the difficult closed-loop control that realizes melt.Electron beam and LASER HEATING concentration of energy help the significantly raising of temperature gradient, but can only calorify the surface of material, and crucible can not be arranged, generally can only the undersized wire rod of moulding.Resistance heating mainly contains two kinds of graphite heating and METAL HEATING PROCESS.Graphite resistance heating temperature control is easy, but it is very slow to heat up, the volatile workpiece carbonization that makes.As the exothermic material of equilibrium temperature body, general METAL HEATING PROCESS body such as Ni-Cr silk etc. can only satisfy the demand below 1300 ℃, and tantalum, molybdenum etc. are difficult to bear the high temperature under the oxygen atmosphere, and at high temperature have certain volatility.
Three, summary of the invention
For overcoming can only satisfying the demand below 1300 ℃ and material production being polluted of existing in the prior art, and the deficiency that can cause the melt internal flow, the present invention proposes a kind of metallic resistor heating device.
It is heater material that the present invention adopts refractory metals tungsten, comprises electrode, goes up thermal conductance ring, resistance heating body and following thermal conductance ring.The resistance heating body top is connected with last thermal conductance ring, and the bottom links to each other with following thermal conductance ring, and electrode lays respectively at thermal conductance ring upper surface and fixes, and constitutes the loop.
Resistance heating body comprises four identical arc heat blocks, and the radian of each arc heat block is π/4.Four arc heat blocks are combined into cylindrical shape, form resistance heating body.The height of arc heat block is the length of 1.2～1.7 times of crucibles, and wall thickness is 0.5～1.5mm.
Last thermal conductance ring is made of two semicircular rings, and its external diameter is with the external diameter of resistance heating body.Following thermal conductance ring is an annular, and its external diameter is also with the external diameter of resistance heating body.
Four arc heat blocks are uniformly distributed in down on the thermal conductance ring; Last thermal conductance ring is positioned at the top of resistance heating body, and the faying face between the thermal conductance ring and the faying face of certain a pair of arc heat block in the resistance heating body coincide on two semicircles.Go up between the thermal conductance ring for two and keep the safety clearance; Also keep the safety clearance between the adjacent arc heat block.Two electrodes are separately fixed at the centre of thermal conductance ring arc on each.
During use, shield and be incubated in the peripheral additional insulation of resistive heating device, crucible is positioned at calandria.After crucible and sample install, for the evaporation that suppresses the calandria element with improve its serviceability temperature, to vacuumize body of heater by vacuum system before the heating, then by protecting the gas system to charge into argon gas.Adopt DC power supply to measure heating-up temperature by temperature-measuring heat couple during heating, can form stable thermal field, maximum temperature can reach 2000 ℃.Comprehensive use in conjunction with radiation baffle and cooling fluid can obtain high temperature gradient, carries out the directional solidification pull by the pull system.
The invention has the beneficial effects as follows: because the present invention has adopted dystectic tungsten is heating material, the heating-up temperature height; Good stability, the life-span is long, and times of thermal cycle is more than 500 times; Heater cylindraceous can provide the even temperature field by radiation, can realize material heating and insulation, and the length of isothermal region can be designed to different length according to preparation technology's needs, and cylinder internal diameter also can be regulated according to the specimen finish size, and temperature control is accurate.
Tungsten is refractory metal, and this heating physical efficiency is worked in superhigh temperature, and short-term is used and used for a long time 1800 ℃ the time in the time of 2000 ℃; And at high temperature have enough low vapour pressure, evaporation rate is also very little, unlikely pollution burner hearth and workpiece; With respect to the reducing atmosphere of graphite, this calandria can use under neutral atmosphere.In heating process, electromagnetic distu can be do not formed, flowing of melt in the directional solidification process can be reduced.
Four, description of drawings
Fig. 1 is a structural representation of the present invention.
Fig. 2 is the structural representation of resistance heating body of the present invention.
Fig. 3 is the top plan view of resistance heating body of the present invention.
Fig. 4 is the vertical view of resistance heating body of the present invention.Wherein:
1. body of heater 2. is protected gas system 3. vacuum systems, 4. crucibles, 5. resistance heating bodies
6. heat shield 7. radiation baffles 8. cooling fluids 9. pull systems 10. DC power supply
11. 15. times thermal conductance rings of thermal conductance ring 14. arc heat blocks on temperature-measuring heat couple 12. electrodes 13.
Five, embodiment
Embodiment one
As shown in Figure 2, present embodiment is made with tungsten, comprises electrode 12, goes up thermal conductance ring 13, resistance heating body 5 and following thermal conductance ring 15.Resistance heating body 5 tops are connected with last thermal conductance ring 13, and the bottom links to each other with following thermal conductance ring 15, and electrode 12 lays respectively at thermal conductance ring 13 upper surfaces and fixes, and constitute the loop.
Last thermal conductance ring 13 is made of two semicircular rings; The external diameter of last thermal conductance ring 13 is with the external diameter of resistance heating body 5.Following thermal conductance ring 15 is an annular; The external diameter of following thermal conductance ring 15 is also with the external diameter of resistance heating body 5.
Four arc heat blocks are uniformly distributed in down on the thermal conductance ring 15; Thermal conductance ring 13 is positioned at the top of resistance heating body 5 on two semicircles, and the faying face between the thermal conductance ring 13 and the faying face of certain a pair of arc heat block in the resistance heating body 5 coincide on two semicircles; The faying face of thermal conductance ring 13 and the faying face that resistance heating body 5 coincides are positioned on the same diameter line of resistance heating body 5 on two semicircles.
Keep the safety clearance for avoiding short circuit and guarantee the axial conduction of electric current, going up between the thermal conductance ring 13 for two along arc heat block 14; In like manner, also keep the safety clearance between the adjacent arc heat block 14; In this embodiment, used safety clearance is 10mm.Two electrodes 12 are rectangular-shaped, place the centre position of thermal conductance ring 13 arcs on each respectively; 13 welding of thermal conductance ring are gone up with two respectively in the bottom of electrode.
The state that present embodiment uses in device for directionally solidifying as shown in Figure 1.Peripheral additional insulation screen 6 at resistance heating body 5 shields and is incubated, and crucible is positioned at calandria.After crucible 4 and sample install, for the evaporation that suppresses the calandria element with improve its serviceability temperature, to vacuumize by 3 pairs of bodies of heater 1 of vacuum system before the heating, then by protecting gas system 2 to charge into argon gas.Adopt DC power supply 10 to measure heating-up temperature by temperature-measuring heat couple 11 during heating, can form stable thermal field, maximum temperature can reach 2000 ℃.Comprehensive use in conjunction with radiation baffle 7 and cooling fluid 8 can obtain high temperature gradient, carries out the directional solidification pull by pull system 9.
Embodiment two
As shown in Figure 2, present embodiment is made with tungsten, comprises electrode 12, goes up thermal conductance ring 13, resistance heating body 5 and following thermal conductance ring 15.Resistance heating body 5 tops are connected with last thermal conductance ring 13, and the bottom links to each other with following thermal conductance ring 15, and electrode 12 lays respectively at thermal conductance ring 13 upper surfaces and fixes, and constitute the loop.
Last thermal conductance ring 13 is made of two semicircular rings; The external diameter of last thermal conductance ring 13 is with the external diameter of resistance heating body 5.Following thermal conductance ring 15 is an annular; The external diameter of following thermal conductance ring 15 is also with the external diameter of resistance heating body 5.
Four arc heat blocks are uniformly distributed in down on the thermal conductance ring 15; Thermal conductance ring 13 is positioned at the top of resistance heating body 5 on two semicircles, and the faying face between the thermal conductance ring 13 and the faying face of certain a pair of arc heat block in the resistance heating body 5 coincide on two semicircles; The faying face of thermal conductance ring 13 and the faying face that resistance heating body 5 coincides are positioned on the same diameter line of resistance heating body 5 on two semicircles.
Keep the safety clearance for avoiding short circuit and guarantee the axial conduction of electric current, going up between the thermal conductance ring 13 for two along arc heat block 14; In like manner, also keep the safety clearance between the adjacent arc heat block 14; In this embodiment, used safety clearance is 10mm.Two electrodes 12 are rectangular-shaped, place the centre position of thermal conductance ring 13 arcs on each respectively; 13 welding of thermal conductance ring are gone up with two respectively in the bottom of electrode.
The state that present embodiment uses in device for directionally solidifying as shown in Figure 1.Peripheral additional insulation screen 6 at resistance heating body 5 shields and is incubated, and crucible is positioned at calandria.After crucible 4 and sample install, for the evaporation that suppresses the calandria element with improve its serviceability temperature, to vacuumize by 3 pairs of bodies of heater 1 of vacuum system before the heating, then by protecting gas system 2 to charge into argon gas.Adopt DC power supply 10 to measure heating-up temperature by temperature-measuring heat couple 11 during heating, can form stable thermal field, maximum temperature can reach 2000 ℃.Comprehensive use in conjunction with radiation baffle 7 and cooling fluid 8 can obtain high temperature gradient, carries out the directional solidification pull by pull system 9.
Embodiment three
As shown in Figure 2, present embodiment is made with tungsten, comprises electrode 12, goes up thermal conductance ring 13, resistance heating body 5 and following thermal conductance ring 15.Resistance heating body 5 tops are connected with last thermal conductance ring 13, and the bottom links to each other with following thermal conductance ring 15, and electrode 12 lays respectively at thermal conductance ring 13 upper surfaces and fixes, and constitute the loop.
Last thermal conductance ring 13 is made of two semicircular rings; The external diameter of last thermal conductance ring 13 is with the external diameter of resistance heating body 5.Following thermal conductance ring 15 is an annular; The external diameter of following thermal conductance ring 15 is also with the external diameter of resistance heating body 5.
Four arc heat blocks are uniformly distributed in down on the thermal conductance ring 15; Thermal conductance ring 13 is positioned at the top of resistance heating body 5 on two semicircles, and the faying face between the thermal conductance ring 13 and the faying face of certain a pair of arc heat block in the resistance heating body 5 coincide on two semicircles; The faying face of thermal conductance ring 13 and the faying face that resistance heating body 5 coincides are positioned on the same diameter line of resistance heating body 5 on two semicircles.
Keep the safety clearance for avoiding short circuit and guarantee the axial conduction of electric current, going up between the thermal conductance ring 13 for two along arc heat block 14; In like manner, also keep the safety clearance between the adjacent arc heat block 14; In this embodiment, used safety clearance is 10mm.Two electrodes 12 are rectangular-shaped, place the centre position of thermal conductance ring 13 arcs on each respectively; 13 welding of thermal conductance ring are gone up with two respectively in the bottom of electrode.
The state that present embodiment uses in device for directionally solidifying as shown in Figure 1.Peripheral additional insulation screen 6 at resistance heating body 5 shields and is incubated, and crucible is positioned at calandria.After crucible 4 and sample install, for the evaporation that suppresses the calandria element with improve its serviceability temperature, to vacuumize by 3 pairs of bodies of heater 1 of vacuum system before the heating, then by protecting gas system 2 to charge into argon gas.Adopt DC power supply 10 to measure heating-up temperature by temperature-measuring heat couple 11 during heating, can form stable thermal field, maximum temperature can reach 2000 ℃.Comprehensive use in conjunction with radiation baffle 7 and cooling fluid 8 can obtain high temperature gradient, carries out the directional solidification pull by pull system 9.
Claims (5)
1. a metallic resistor heating device comprises resistance heating body (5) and electrode (12); Crucible (4) is positioned at resistance heating body (5); It is characterized in that resistance heating body (5) and electrode (12) adopt tungsten to make; The arc heat block (14) that resistance heating body (5) is π/4 by four radians combines; Last thermal conductance ring (13) is made of two semicircular rings, is positioned at the top of resistance heating body (5); Following thermal conductance ring (15) is an annular, is positioned at the bottom of resistance heating body (5); The faying face of certain the two pairs of arc heat block (14) in faying face between two thermal conductance rings (13) and the resistance heating body (5) coincides; Settle two electrodes (12) respectively at the top of two semi-round ring shape thermal conductance rings (13).
2. a kind of according to claim 1 metallic resistor heating device, the height that it is characterized in that arc heat block (14) is the length of 1.2～1.7 times of crucibles.
3. a kind of according to claim 1 metallic resistor heating device, the wall thickness that it is characterized in that arc heat block (14) is 0.5～1.5mm.
4. a kind of according to claim 1 metallic resistor heating device is characterized in that between the arc heat block (14) safety clearance being arranged.
5. a kind of according to claim 1 metallic resistor heating device is characterized in that between two semi-round ring shape thermal conductance rings (13) safety clearance being arranged.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200325900U CN201435834Y (en) | 2009-04-15 | 2009-04-15 | Metal resistance heater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200325900U CN201435834Y (en) | 2009-04-15 | 2009-04-15 | Metal resistance heater |
Publications (1)
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| CN201435834Y true CN201435834Y (en) | 2010-03-31 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2009200325900U Expired - Fee Related CN201435834Y (en) | 2009-04-15 | 2009-04-15 | Metal resistance heater |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101797639A (en) * | 2010-04-08 | 2010-08-11 | 西北工业大学 | Device for directionally solidifying by locally and forcibly heating with resistance at high gradient |
| CN101868075A (en) * | 2009-04-15 | 2010-10-20 | 西北工业大学 | Metallic resistor heating device used for ultrahigh temperature directional solidification |
| CN102849919A (en) * | 2012-06-14 | 2013-01-02 | 湖北新华光信息材料有限公司 | Optical glass preparation furnace |
| CN109280761A (en) * | 2018-11-27 | 2019-01-29 | 四川石油天然气建设工程有限责任公司 | A kind of field acidic environment carbon steel pipe stress-removal construction operation method |
-
2009
- 2009-04-15 CN CN2009200325900U patent/CN201435834Y/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101868075A (en) * | 2009-04-15 | 2010-10-20 | 西北工业大学 | Metallic resistor heating device used for ultrahigh temperature directional solidification |
| CN101868075B (en) * | 2009-04-15 | 2013-01-16 | 西北工业大学 | Metallic resistor heating device used for ultrahigh temperature directional solidification |
| CN101797639A (en) * | 2010-04-08 | 2010-08-11 | 西北工业大学 | Device for directionally solidifying by locally and forcibly heating with resistance at high gradient |
| CN102849919A (en) * | 2012-06-14 | 2013-01-02 | 湖北新华光信息材料有限公司 | Optical glass preparation furnace |
| CN102849919B (en) * | 2012-06-14 | 2015-04-08 | 湖北新华光信息材料有限公司 | Optical glass preparation furnace |
| CN109280761A (en) * | 2018-11-27 | 2019-01-29 | 四川石油天然气建设工程有限责任公司 | A kind of field acidic environment carbon steel pipe stress-removal construction operation method |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100331 Termination date: 20120415 |