CN101586199B - Method for preparing large foamed aluminum plate by an internal stress free cooling method - Google Patents
Method for preparing large foamed aluminum plate by an internal stress free cooling method Download PDFInfo
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- CN101586199B CN101586199B CN2008100114986A CN200810011498A CN101586199B CN 101586199 B CN101586199 B CN 101586199B CN 2008100114986 A CN2008100114986 A CN 2008100114986A CN 200810011498 A CN200810011498 A CN 200810011498A CN 101586199 B CN101586199 B CN 101586199B
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Abstract
The invention relates to a method for preparing a large foamed aluminum plate by an internal stress free cooling method, which effectively solves the technical difficulty that the prior art can not produce the large foamed aluminum plate and achieves the purpose of eliminating the internal stress through controlling different cooling speeds of all aspects in a die cavity of liquid foamed aluminum.The method comprises the following step: the die cavity filled with the liquid foamed aluminum is arranged on a cooling platform for being cooled. The bottom surface and two side surfaces of the diecavity are forced to be cooled by a ventilator, and two end surfaces are naturally cooled. The upper surface of the die cavity is thermally protected by adopting a hot cap, thereby leading the set time of the upper liquid level to be 10-20min later than that of other five liquid levels. Because the set of the upper liquid level lags behind, a majority of internal stress produced during the set canbe eliminated. The foamed aluminum plate with the length and the width of 2,000 mm and 1,000 mm can be prepared by adopting the method. The foamed aluminum plate prepared by the method can be rapidlycooled and heated and can not be easily deformed during the cooling.
Description
Technical field:
The present invention relates to a kind of method for preparing foamed aluminium board, on-deformable internal stress free method of cooling prepares the method for large foamed aluminum plate in particularly a kind of heating and cooling process, belongs to functional materials manufacturing and applied technical field.
Background technology:
Foamed aluminium board is a new-type functional material, and its vesicular structure has been brought into play mechanical property and structure properties most effectively in low density condition.Foamed aluminium material combines multi-functional, this be traditional material can not possess.For example: low density, high rigidity, HI high impact energy absorption capacity, low heat conductivity, low permeability, good damping performance and sound absorption qualities, excellent high-temperature stability energy, endurance quality, do not produce poison gas or the like when being heated.Because foamed aluminium material has above-mentioned performance and characteristics, many in the world developed countries have carried out industrialization and have produced foamed aluminium.As: the U.S., Canada, Germany, Austria, Japan and Korea S etc.Tens research units and producer research and development foamed aluminium material is arranged at home.But because they do not solve the internal stress problem that foamed aluminium produces well in process of cooling, make foamed aluminium inside produce cavity and crackle, seriously influence the integrated yield of product, in order to improve yield rate, have only that geometrical dimension is little could to reduce internal stress, improve some yield rates relatively.Present domestic overall dimension is 1000mm * 1000mm, but its technological process instability, generally all rests on the level of 600mm * 600mm or 500mm * 500mm.Mostly be 800mm * 800mm abroad at present.
Summary of the invention:
The objective of the invention is at above-mentioned the deficiencies in the prior art, and a kind of big specification that adopts the preparation of internal stress free method of cooling is provided, that is: the method for the foamed aluminium board of 2000mm * 1000mm.This method mainly is to reach the purpose of eliminating internal stress by control liquid foam aluminium different speed of cooling of each face in die cavity, thereby solves the technical barrier that prior art can not prepare large foamed aluminum plate.Its concrete practice is: will install liquid foam aluminum dipping form groove and place the cooling table cooling.Cooling, two end face naturally cooling are forced with ventilator in die cavity bottom surface and two sides.The top employing hot tap of die cavity carries out heat protection, thus late 10-20 of time minute that the top liquid level is solidified than other five liquid levels.Because the top liquid level solidifies hysteresis, can eliminate the internal stress that produces in most of process of setting, stop the generation of cavity and crackle substantially.
The alloy ingredient and the basic process steps of preparation foamed aluminium board are as described below:
1, alloy ingredient and whipping agent
A calcium (Ca) 1-2%;
Silicon (Si) 1-12%;
Aluminium (Al) surplus.
The B whipping agent
Titanium hydride (TiH
2).
Processing step
(a) by said ratio raw material is melted in smelting furnace, make alloy;
(b) will melt good alloy and in rabbling roaster, stir, add whipping agent TiH simultaneously
2, the ratio of whipping agent is the 1-2% of melt weight;
(c) melt that stirs is poured in the die cavity;
(d) die cavity that will install melt is put into foaming furnace and is foamed;
(e) the liquid foam aluminium that will send out cools off at cooling table;
(f) the solid state foam aluminium sheet that cooling is good is delivered to sawing machine and is cut by certain size.
The present invention conceives scientific and reasonable, and method is simple.Owing to adopt hot tap to carry out the different cooling way of employing in heat protection and the process of cooling; and make elimination cavity and crackle in the fast and heating of foamed aluminium board cooling, the process of cooling; not yielding, solved preferably at present can not production large size foamed aluminium board technical barrier.The present invention has widened the Application Areas of foamed aluminium board, has excellent popularization and is worth.
Description of drawings:
Fig. 1 is the front view of die cavity of the present invention.
Fig. 2 is the left view of Fig. 1.
Fig. 3 is the front view of hot tap of the present invention.
Fig. 4 is the left view of Fig. 3.
Embodiment:
With reference to Fig. 1-4, die cavity is hexahedron structure, and it comprises housing 1, and housing 1 is made up of side 2, end face 3 and bottom surface 5.Above-mentioned side 2, end face 3 and bottom surface 5 are provided with radiator element 4.Be provided with hot tap 6 above the housing 1, electrothermal tube 7 is housed in the hot tap 6, be provided with thermal insulation layer 8 above the electrothermal tube 7.
Its concrete practice is: will install liquid foam aluminum dipping form groove and place the cooling table cooling.Cooling, two end face 3 naturally cooling are forced with ventilator in die cavity bottom surface and two sides.Adopt hot tap 6 to carry out heat protection above the die cavity, thus late 10-20 of time minute that the top liquid level is solidified than other five liquid levels.Because the top liquid level solidifies hysteresis, can eliminate the internal stress that produces in most of process of setting.This is very important technological process, only accomplishes that this point could produce large foamed aluminum, can produce the foamed aluminium board of 2000mm * 1000mm, and its thickness can be decided according to the actual requirements.
Embodiment one
The alloy ingredient and the whipping agent of preparation foamed aluminium board:
A calcium (Ca) 1%;
Silicon (Si) 12%;
Aluminium (Al) surplus.
The B whipping agent
Titanium hydride (TiH
2).
Processing step
(a) by said ratio raw material is melted in 400kg electrofusion stove, make alloy;
(b) will melt good alloy and in rabbling roaster, stir, add whipping agent TiH simultaneously
2, the ratio of whipping agent is the 1-2% of melt weight;
(c) melt that stirs is poured in the die cavity;
(d) die cavity that will install melt is put into foaming furnace and is foamed;
(e) the liquid foam aluminium that will send out cools off at cooling table;
(f) the solid state foam aluminium sheet that cooling is good is delivered to sawing machine and is cut by certain size.
Embodiment two
The alloy ingredient and the whipping agent of preparation foamed aluminium board:
A calcium (Ca) 2%;
Silicon (Si) 6%;
Aluminium (Al) surplus.
The B whipping agent
Titanium hydride (TiH
2).
The processing step of preparation is identical with embodiment one.
Claims (3)
1. the internal stress free method of cooling prepares the method for 2000mmx1000mm foamed aluminium board; it is characterized in that: this method is to place the cooling table cooling with installing liquid foam aluminum dipping form groove; cooling is forced with ventilator in the die cavity bottom surface that it is used and two sides; two end face naturally cooling; the top employing hot tap of die cavity carries out the heat protection; thereby the internal stress that produces in most of process of setting because the top liquid level solidifies hysteresis, can be eliminated in late 10-20 of time minute that the top liquid level is solidified than other five liquid levels.
2. internal stress free method of cooling as claimed in claim 1 prepares the method for 2000mmx1000mm foamed aluminium board, it is characterized in that the step of preparation process that it is concrete:
(a) proportioning is good raw material melts in smelting furnace, makes alloy;
(b) will melt good alloy and in rabbling roaster, stir, add whipping agent TiH simultaneously
2
(c) melt that stirs is poured in the die cavity;
(d) die cavity that will install melt is put into foaming furnace and is foamed;
(e) the liquid foam aluminium that will send out cools off at cooling table;
(f) the solid state foam aluminium sheet that cooling is good is delivered to sawing machine and is cut by certain size.
3. internal stress free method of cooling as claimed in claim 1 prepares the method for 2000mmx1000mm foamed aluminium board, it is characterized in that: the die cavity that it adopts is hexahedron structure, this die cavity comprises housing (1), housing (1) is made up of side (2), end face (3) and bottom surface (5), above-mentioned side (2), end face (3) and bottom surface (5) are provided with radiator element (4), be provided with hot tap (6) above the housing (1), electrothermal tube (7) is housed in the hot tap (6), is provided with thermal insulation layer (8) above the electrothermal tube (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100114986A CN101586199B (en) | 2008-05-21 | 2008-05-21 | Method for preparing large foamed aluminum plate by an internal stress free cooling method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100114986A CN101586199B (en) | 2008-05-21 | 2008-05-21 | Method for preparing large foamed aluminum plate by an internal stress free cooling method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101586199A CN101586199A (en) | 2009-11-25 |
| CN101586199B true CN101586199B (en) | 2010-12-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008100114986A Expired - Fee Related CN101586199B (en) | 2008-05-21 | 2008-05-21 | Method for preparing large foamed aluminum plate by an internal stress free cooling method |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105538582A (en) * | 2016-02-24 | 2016-05-04 | 江苏润大橡塑材料有限公司 | Temperature difference compensation foaming furnace |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5112697A (en) * | 1989-09-06 | 1992-05-12 | Alcan International Limited | Stabilized metal foam body |
| CN1179473A (en) * | 1996-10-10 | 1998-04-22 | 中国科学院固体物理研究所 | Process for preparing foam metal aluminium and its alloy |
| CN1381606A (en) * | 2002-01-28 | 2002-11-27 | 东南大学 | Process for preparing closed-pore foam Al-alloy |
-
2008
- 2008-05-21 CN CN2008100114986A patent/CN101586199B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5112697A (en) * | 1989-09-06 | 1992-05-12 | Alcan International Limited | Stabilized metal foam body |
| CN1179473A (en) * | 1996-10-10 | 1998-04-22 | 中国科学院固体物理研究所 | Process for preparing foam metal aluminium and its alloy |
| CN1381606A (en) * | 2002-01-28 | 2002-11-27 | 东南大学 | Process for preparing closed-pore foam Al-alloy |
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| Publication number | Publication date |
|---|---|
| CN101586199A (en) | 2009-11-25 |
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Granted publication date: 20101215 Termination date: 20130521 |