CN2636181Y - High temp. thermal-insulating screen - Google Patents
High temp. thermal-insulating screen Download PDFInfo
- Publication number
- CN2636181Y CN2636181Y CNU032139179U CN03213917U CN2636181Y CN 2636181 Y CN2636181 Y CN 2636181Y CN U032139179 U CNU032139179 U CN U032139179U CN 03213917 U CN03213917 U CN 03213917U CN 2636181 Y CN2636181 Y CN 2636181Y
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- temperature
- zone
- heat insulation
- metal plate
- improving
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Abstract
The utility model relates to a directional concretion technology, in particular to a novel high temperature heat insulation screen for directional concretion equipment. A metal plate is arranged between an upper heating zone and a lower heating zone, which is fixed by a ceramics ring; the metal plate adopts molybdenum plate or Ta material. Because a metal heat insulation screen is arranged between the upper heating zone and the lower heating zone, the surface of the metal plate shines like a mirror in high temperature, which can reflect beam better, but the heater is transferred by the way of heat radiation in vacuum environment, therefore, the metal plate can take good heat insulation effect. Because adopting metal heat insulation screen, the upper zone can be controlled in a relatively lower heating temperature, improving the temperature of the lower zone without causing that the temperature of the upper zone rises, thus improving the temperature grads. The utility model prevents that the temperature grads increasing in the prior art causes the temperature of the upper zone improving at the same time, which results in element damage, reaction happening between alloy and shell and takes bad effect that the performance of casting reduces.
Description
Technical field
The utility model relates to directional solidification technique, specifically a kind of new type high temperature heat screen that is used for apparatus for directional solidification.
Background technology
Directional solidification technique is not only the basic means of producing the more excellent material of vertical performance, also is the important method of research solidification theory and development new material.Therefore, directional solidification technique is paid close attention in the Materials Science and Engineering field, and is widely used.Each state all pays much attention to the application and the research of directional solidification technique, thereby apparatus for directional solidification is just had higher requirement.
Directional freeze method and device mainly contain: power reduces method (PD method), high speed freezing method (HRS method) and liquid metal cooling method (LMC method).Wherein HRS method technology is simple relatively, is easy to control, is the main method that present industrial monocrystalline and directional solidification castings are produced.The capital equipment of HRS method is directional solidification furnace or is called single crystal growing furnace that one of them key index is a thermograde.Thermograde height, production efficiency are just high, and the performance of sample or foundry goods just improves.Present directional solidification furnace generally adopts two-region heating, i.e. two sections heater.Need to improve the inferior segment temperature in order to improve thermograde, cause district's temperature to improve thereupon, cause melting loss of elements, alloy and shell to react easily, its result reduces cast properties.
The utility model content
The purpose of this utility model provides a kind of raising inferior segment temperature and can not cause district's temperature to raise, and effectively improves the new type high temperature heat screen of thermograde.
The technical solution of the utility model is: laying a heat insulation sheet metal (adopting molybdenum sheet or tantalum piece) of using up and down between the thermal treatment zone, fix with ceramic ring.
The utlity model has following advantage:
The utility model is owing to lay metallic insulation screen between upper and lower region, the metal surface is as bright as a sixpence under the high temperature, reflection ray preferably, and mainly conduct heat with the heat radiation form under the vacuum environment, therefore, sheet metal plays good effect of heat insulation.Because adopt the metallic insulation screen, last district can be controlled at relatively low heating-up temperature, improve the inferior segment temperature and can not cause district's temperature to raise, can effectively improve thermograde.Avoid improving in the prior art thermograde and caused district's temperature to improve simultaneously thereupon, caused melting loss of elements, alloy and shell to react, the harmful effect that cast properties is reduced.
Description of drawings
Fig. 1 is the utility model structural representation.
Fig. 2 is the as a result figure of embodiment of the utility model to the raising of thermograde.
The specific embodiment
Below in conjunction with example in detail the utility model is described in detail.
As shown in Figure 1, sheet metal 1 is fixed between upper and lower region heater 4 and 5 by ceramic ring 2 and 3.
Operation principle of the present utility model is:
The utility model is applied in the large-scale vacuum induction directional solidification furnace, and sheet metal plays heat-blocking action, and ceramic ring plays insulation and positioning action.At high temperature the metal surface is as bright as a sixpence, reflection ray preferably, and mainly conduct heat with the heat radiation form under the vacuum environment, therefore, sheet metal plays good effect of heat insulation.Because adopt the metallic insulation screen, last district can be controlled at relatively low heating-up temperature, improve the inferior segment temperature and can not cause district's temperature to raise, can effectively improve thermograde.
Present embodiment is installed in the high temperature insulating screen between the thermal treatment zone of two heaters in the homemade large-scale ZGD-2 single crystal growing furnace, when 1450 ℃ of last district temperature, 1600 ℃ of inferior segment temperature, carry out data automatic collecting and analysis result as shown in Figure 2, thermograde improves a lot, and reaches more than 20%.
Claims (2)
1. a new type high temperature heat screen is characterized in that: laying a sheet metal (1) between the thermal treatment zone (4,5) up and down, fixing by ceramic ring (2) and (3).
2. by the described new type high temperature heat screen of claim 1, it is characterized in that: sheet metal (1) adopts molybdenum sheet or tantalum material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU032139179U CN2636181Y (en) | 2003-07-04 | 2003-07-04 | High temp. thermal-insulating screen |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU032139179U CN2636181Y (en) | 2003-07-04 | 2003-07-04 | High temp. thermal-insulating screen |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2636181Y true CN2636181Y (en) | 2004-08-25 |
Family
ID=34289756
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU032139179U Expired - Fee Related CN2636181Y (en) | 2003-07-04 | 2003-07-04 | High temp. thermal-insulating screen |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2636181Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101805922A (en) * | 2010-04-27 | 2010-08-18 | 王敬 | Heat shielding and ingot furnace with same |
| CN101886291A (en) * | 2010-07-13 | 2010-11-17 | 王敬 | Heat insulating cage and ingot casting furnace with same |
| CN102179506A (en) * | 2011-04-07 | 2011-09-14 | 西北工业大学 | Compound heat insulation baffle used for directional solidification |
| CN103160934A (en) * | 2011-12-18 | 2013-06-19 | 洛阳金诺机械工程有限公司 | Device and method of temperature gradient control in growth process of crystal material |
-
2003
- 2003-07-04 CN CNU032139179U patent/CN2636181Y/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101805922A (en) * | 2010-04-27 | 2010-08-18 | 王敬 | Heat shielding and ingot furnace with same |
| CN101886291A (en) * | 2010-07-13 | 2010-11-17 | 王敬 | Heat insulating cage and ingot casting furnace with same |
| CN102179506A (en) * | 2011-04-07 | 2011-09-14 | 西北工业大学 | Compound heat insulation baffle used for directional solidification |
| CN103160934A (en) * | 2011-12-18 | 2013-06-19 | 洛阳金诺机械工程有限公司 | Device and method of temperature gradient control in growth process of crystal material |
| CN103160934B (en) * | 2011-12-18 | 2016-05-18 | 洛阳金诺机械工程有限公司 | Thermograde control device and method thereof when a kind of grown crystal material |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |