CN1853826A - Heat-insulated baffle for oriented freezing cast - Google Patents
Heat-insulated baffle for oriented freezing cast Download PDFInfo
- Publication number
- CN1853826A CN1853826A CN 200510046341 CN200510046341A CN1853826A CN 1853826 A CN1853826 A CN 1853826A CN 200510046341 CN200510046341 CN 200510046341 CN 200510046341 A CN200510046341 A CN 200510046341A CN 1853826 A CN1853826 A CN 1853826A
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- China
- Prior art keywords
- thermal baffle
- directional solidification
- heat
- graphite
- formwork
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 230000008014 freezing Effects 0.000 title 1
- 238000007710 freezing Methods 0.000 title 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 28
- 229910002804 graphite Inorganic materials 0.000 claims abstract description 26
- 239000010439 graphite Substances 0.000 claims abstract description 26
- 238000005266 casting Methods 0.000 claims abstract description 21
- 238000009415 formwork Methods 0.000 claims description 17
- 238000007711 solidification Methods 0.000 claims description 17
- 230000008023 solidification Effects 0.000 claims description 17
- 238000010276 construction Methods 0.000 claims description 3
- 239000002131 composite material Substances 0.000 description 12
- 238000009413 insulation Methods 0.000 description 10
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 238000007669 thermal treatment Methods 0.000 description 6
- 229910052593 corundum Inorganic materials 0.000 description 5
- 239000010431 corundum Substances 0.000 description 5
- 230000005855 radiation Effects 0.000 description 5
- 238000005520 cutting process Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000001816 cooling Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 229910052750 molybdenum Inorganic materials 0.000 description 2
- 239000011733 molybdenum Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 206010015535 Euphoric mood Diseases 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000003610 charcoal Substances 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
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- Furnace Housings, Linings, Walls, And Ceilings (AREA)
Abstract
A heat isolating plate for the directionally solidified casting is composed of two or more plates for splicing them together to become a single one, an external ring matched with the internal surface of temp holding furnace tightly, and an internal ring matched with the mould casing but retaining a gap (0.5-10 mm) between them for moving the mould casing easily. Said plate is just combined hard graphite felt.
Description
Technical field
The present invention relates to directional solidification technique, specifically a kind of new type high temperature thermal baffle that is applied to apparatus for directional solidification.
Background technology
In traditional directional solidification process, be cast in the casting mold of preheating in holding furnace after the alloy pig fusing, casting mold is placed on the water mold, and casting mold is pulled out holding furnace gradually with certain speed, form the higher thermograde of foundry goods, this is the key that forms metal crystallographic orientation tissue.In order to reach maximum thermograde, key is to make heat thermal radiation loss of cold-zone outside holding furnace of holding furnace hot-zone reduce to minimum, and heat is is mainly scattered and disappeared to extraneous radiation by the water mold conduction and by the mo(U)ld face outside holding furnace.In order to promote directed hot-fluid (strengthening the thermograde on this direction) perpendicular to part cross-section, generally a kind of thermal baffle is set in the holding furnace bottom, by thermal baffle the thermal treatment zone and cooling zone two parts are separated.The thermal baffle effect of heat insulation has direct influence to the thermograde in solid liquid interface forward position.
At present, thermal baffle is mainly corundum ring, molybdenum sheet, the multilayer molybdenum sheet folder graphite felt etc. of ring-type and fixed size in the apparatus for directional solidification.The total shortcoming of these thermal baffles is to change according to the formwork geomery shape and size of thermal baffle, they all are ring-types, far away with the formwork distance, with a large amount of radiation losses are to the external world between the heat insulation loop, the heat that especially is radiated the cooling zone has had a strong impact on the thermograde of upper and lower region to this heat that causes the thermal treatment zone from formwork.Another shortcoming of corundum ring and molybdenum sheet structure is to use inconvenient, needs complicated preparation technology and following process just can make, the cost height, and be difficult to make complicated shape.In addition: corundum ring ftractures in high temperature uses easily, thereby influences its effect of heat insulation.
Summary of the invention
The purpose of this invention is to provide in a kind of directional solidification, improve thermograde, good heat-insulation effect, the hard felt high temperature insulating of NEW TYPE OF COMPOSITE graphite baffle plate with low cost, easy to use.
The invention provides a kind of directional solidification casting thermal baffle, it is characterized in that: be put together by two or polylith, outer ring and furnace shell are combined closely, inner ring geomery and used formwork geomery coincide, make the slit between it be controlled at 0.5-10mm, when spurring formwork up and down with assurance, the formwork motion is not influenced by the hard felt baffle plate of composite graphite.This thermal baffle can be fixed on the casting mold holding furnace thermal treatment zone below of directional solidification furnace with a lot of methods, for example can use molybdenum filament or intermediate plate is fixed.
Directional solidification casting thermal baffle provided by the invention, its piece can constitute sandwich construction by the hard felt of one or more pieces graphite on thickness.
Directional solidification casting thermal baffle provided by the invention, the thickness of its piece are 0.5～8cm.
Directional solidification casting provided by the invention has following advantage with thermal baffle:
1, not only have good effect of heat insulation, and easy to use.Because the one side that the hard felt of composite graphite is had graphite paper among the present invention is in holding furnace, at high temperature the stronger gloss reflected radiation heat in surface is effective.In addition, the hard felt of composite graphite itself has good effect of heat insulation, by reduction or cutting technique its outer ring and casting mold holding furnace body of heater are combined closely, inner ring geomery and used formwork outer ring geomery coincide, make the slit between it be controlled at 0.5-10mm, can reach better effect of heat insulation like this.With all annular thermal baffles comparisons in the past, and distance significantly reduces the bright raising of effect of heat insulation between the formwork.
2, with prior art in three layers of molybdenum sheets folder one deck graphite felt mentioning of corundum ring or patent 01250519.6 do thermal baffle and compare, make more convenient, as long as with corresponding casting mold holding furnace of the hard felt of its composite graphite and the cutting of formwork size or reduce and do not need machining, be fixed on below, the thermal treatment zone then and get final product, the thermal baffle shape can change with the change of casting mold shape, size.
Thermograde improved clearly when 3, employing was of the present invention, obtained better crystallographic orientation tissue.
Description of drawings
The schematic diagram that Fig. 1 uses in directional solidification casting for the hard felt thermal baffle of composite graphite;
Fig. 2 is the AA profile of Fig. 1;
The schematic diagram that Fig. 3 uses in directional solidification casting for traditional thermal baffle;
Fig. 4 is for using the photo after orientation equipment of the present invention is pulled out directed plate tensile sample macrocorrosion;
Fig. 5 is the photo after the orientation equipment of the general annular thermal baffle of application is pulled out directed plate tensile sample macrocorrosion.
The specific embodiment
Describe in detail below in conjunction with example.
As shown in Figure 1, for certain specific formwork (1), thermal baffle (2) is selected the hard felt of the thick graphite of 70mm for use, the hard felt of graphite, can obtain from relevant supplier, the hard felt of SIGRATHERM graphite that for example German SGL raw material of wood-charcoal material group produces, the hard felt of graphite that China Liaoyang carbon product factory produces etc., the hard felt of graphite is a sandwich construction, at least there is graphite paper on the one side surface, mid portion is a graphite fibre, use reduction or cutting technique its outer ring and casting mold holding furnace body of heater (3) are combined closely, interior diagram shape size and used formwork outer ring geomery coincide, and make the slit (4) between it be controlled at 0.5mm, when guaranteeing to spur formwork up and down simultaneously, the formwork motion is not influenced by the hard felt baffle plate of composite graphite.Because chassis (11) and cast gate (12) shape, size and the casting region of formwork are that formwork stage casing part (13) is widely different, for better heat insulation, the hard felt of composite graphite (2) can be cut in half, coincide being cut into formwork stage casing part (13) shape in the middle of the hard felt of composite graphite.With the intermediate plate (5) that is fixed on the heating furnace shell (3) the hard felt of composite graphite is fixed on below, the thermal treatment zone.
This thermal baffle is applied to be positioned at the below of the thermal treatment zone under the vacuum high-temperature environment.The hard felt of composite graphite has one of graphite paper to face up, and at high temperature there is stronger gloss on the surface, reflected radiation heat effective, and the hard felt of composite graphite itself has very strong effect of heat insulation.
With the apparatus for directional solidification (as illustrated in fig. 1 and 2) that this thermal baffle is used for developing voluntarily, make thermal baffle (as shown in Figure 3) with corundum ring or molybdenum sheet ring has had large increase to thermograde.Use the contrast that this thermal baffle and the orientation equipment of using general annular thermal baffle pull out behind the directed plate tensile sample macrocorrosion and see Fig. 4 and Fig. 5.
Claims (3)
1, a kind of directional solidification casting thermal baffle is characterized in that: be put together by two or polylith, outer ring and casting mold holding furnace body of heater are combined closely, and inner ring geomery and used formwork geomery coincide, and make the slit between it be controlled at 0.5-10mm.
2, according to the described directional solidification casting thermal baffle of claim 1, it is characterized in that: described constitutes sandwich construction by the hard felt of one or more pieces graphite on thickness.
3, according to the described directional solidification casting thermal baffle of claim 1, it is characterized in that: described for thickness 0.5～8cm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510046341 CN1853826A (en) | 2005-04-29 | 2005-04-29 | Heat-insulated baffle for oriented freezing cast |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510046341 CN1853826A (en) | 2005-04-29 | 2005-04-29 | Heat-insulated baffle for oriented freezing cast |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1853826A true CN1853826A (en) | 2006-11-01 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200510046341 Pending CN1853826A (en) | 2005-04-29 | 2005-04-29 | Heat-insulated baffle for oriented freezing cast |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1853826A (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101934367A (en) * | 2010-09-07 | 2011-01-05 | 沈阳铸造研究所 | Thermal-insulation baffle plate for liquid metal cooling and oriented solidification casting equipment |
| CN102179506A (en) * | 2011-04-07 | 2011-09-14 | 西北工业大学 | Compound heat insulation baffle used for directional solidification |
| CN102240797A (en) * | 2010-05-13 | 2011-11-16 | 辽宁科技大学 | Device for insulating side wall of directional solidified steel ingot |
| CN102400206A (en) * | 2011-11-15 | 2012-04-04 | 中国航空工业集团公司北京航空材料研究院 | Combined type heat-insulating baffle for increasing monocrystal solidification temperature gradient |
| WO2012055128A1 (en) * | 2010-10-26 | 2012-05-03 | Zhu Shucheng | Ring-shaped clean metal casting mold |
| CN101463500B (en) * | 2008-03-03 | 2012-06-27 | 湖南金博复合材料科技有限公司 | High temperature furnace fire resistant heat preserving cover and technique for producing the same |
| CN103397204A (en) * | 2013-07-03 | 2013-11-20 | 宁夏鹏程致远自动化技术有限公司 | Novel insulation baffle of magnesium crystallizer |
| CN109355697A (en) * | 2018-11-27 | 2019-02-19 | 沈阳航发精密铸造有限公司 | A kind of crystallographic orientation furnace temperature thermal baffle |
| CN110315033A (en) * | 2019-07-04 | 2019-10-11 | 深圳市万泽中南研究院有限公司 | Ceramic shell mould and its manufacturing method for casting single crystal blade |
| CN113046821A (en) * | 2021-05-11 | 2021-06-29 | 宁国市华成金研科技有限公司 | Multi-station directional solidification and single crystal casting furnace |
| CN113279050A (en) * | 2021-05-13 | 2021-08-20 | 中国航发北京航空材料研究院 | Flexible heat insulation baffle for improving single crystal solidification temperature gradient |
-
2005
- 2005-04-29 CN CN 200510046341 patent/CN1853826A/en active Pending
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101463500B (en) * | 2008-03-03 | 2012-06-27 | 湖南金博复合材料科技有限公司 | High temperature furnace fire resistant heat preserving cover and technique for producing the same |
| CN102240797A (en) * | 2010-05-13 | 2011-11-16 | 辽宁科技大学 | Device for insulating side wall of directional solidified steel ingot |
| CN101934367A (en) * | 2010-09-07 | 2011-01-05 | 沈阳铸造研究所 | Thermal-insulation baffle plate for liquid metal cooling and oriented solidification casting equipment |
| US8813823B2 (en) | 2010-10-26 | 2014-08-26 | Xixia Dragon Into Special Material Co., Ltd. | Annular clean metal casting mold |
| WO2012055128A1 (en) * | 2010-10-26 | 2012-05-03 | Zhu Shucheng | Ring-shaped clean metal casting mold |
| CN103221162A (en) * | 2010-10-26 | 2013-07-24 | 朱书成 | Ring-shaped clean metal casting mold |
| CN103221162B (en) * | 2010-10-26 | 2016-03-16 | 朱书成 | Annular clean metal casting mold |
| CN102179506A (en) * | 2011-04-07 | 2011-09-14 | 西北工业大学 | Compound heat insulation baffle used for directional solidification |
| CN102400206A (en) * | 2011-11-15 | 2012-04-04 | 中国航空工业集团公司北京航空材料研究院 | Combined type heat-insulating baffle for increasing monocrystal solidification temperature gradient |
| CN102400206B (en) * | 2011-11-15 | 2014-09-24 | 中国航空工业集团公司北京航空材料研究院 | Combined type heat-insulating baffle for increasing monocrystal solidification temperature gradient |
| CN103397204A (en) * | 2013-07-03 | 2013-11-20 | 宁夏鹏程致远自动化技术有限公司 | Novel insulation baffle of magnesium crystallizer |
| CN109355697A (en) * | 2018-11-27 | 2019-02-19 | 沈阳航发精密铸造有限公司 | A kind of crystallographic orientation furnace temperature thermal baffle |
| CN110315033A (en) * | 2019-07-04 | 2019-10-11 | 深圳市万泽中南研究院有限公司 | Ceramic shell mould and its manufacturing method for casting single crystal blade |
| CN113046821A (en) * | 2021-05-11 | 2021-06-29 | 宁国市华成金研科技有限公司 | Multi-station directional solidification and single crystal casting furnace |
| CN113279050A (en) * | 2021-05-13 | 2021-08-20 | 中国航发北京航空材料研究院 | Flexible heat insulation baffle for improving single crystal solidification temperature gradient |
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