CN102409194B - Method for preparing foam magnesium alloy specially-shaped piece and composite piece by secondary foaming method - Google Patents
Method for preparing foam magnesium alloy specially-shaped piece and composite piece by secondary foaming method Download PDFInfo
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- CN102409194B CN102409194B CN 201010288087 CN201010288087A CN102409194B CN 102409194 B CN102409194 B CN 102409194B CN 201010288087 CN201010288087 CN 201010288087 CN 201010288087 A CN201010288087 A CN 201010288087A CN 102409194 B CN102409194 B CN 102409194B
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- magnesium alloy
- foaming
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- 239000006260 foam Substances 0.000 title claims abstract description 71
- 238000000034 method Methods 0.000 title claims abstract description 36
- 238000005187 foaming Methods 0.000 title claims abstract description 35
- 239000002131 composite material Substances 0.000 title claims abstract description 29
- 229910000861 Mg alloy Inorganic materials 0.000 title claims abstract description 24
- 239000003063 flame retardant Substances 0.000 claims abstract description 15
- 238000001816 cooling Methods 0.000 claims abstract description 11
- 238000003756 stirring Methods 0.000 claims abstract description 10
- 239000002184 metal Substances 0.000 claims abstract description 8
- 229910052751 metal Inorganic materials 0.000 claims abstract description 7
- 239000011777 magnesium Substances 0.000 claims description 35
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims description 33
- 229910052749 magnesium Inorganic materials 0.000 claims description 33
- 229910000838 Al alloy Inorganic materials 0.000 claims description 25
- 239000003795 chemical substances by application Substances 0.000 claims description 8
- 238000007664 blowing Methods 0.000 claims description 7
- 238000010792 warming Methods 0.000 claims description 7
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 claims description 6
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims description 5
- 229910010271 silicon carbide Inorganic materials 0.000 claims description 5
- 229910052987 metal hydride Inorganic materials 0.000 claims description 4
- 150000004681 metal hydrides Chemical class 0.000 claims description 4
- 229910052761 rare earth metal Inorganic materials 0.000 claims description 4
- 150000001875 compounds Chemical class 0.000 claims description 3
- 238000000048 melt cooling Methods 0.000 claims description 3
- 239000000395 magnesium oxide Substances 0.000 claims description 2
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims description 2
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 claims description 2
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 claims description 2
- 230000006835 compression Effects 0.000 abstract description 5
- 238000007906 compression Methods 0.000 abstract description 5
- 239000002245 particle Substances 0.000 abstract description 5
- 239000002243 precursor Substances 0.000 abstract description 5
- 239000007769 metal material Substances 0.000 abstract description 3
- 239000008204 material by function Substances 0.000 abstract description 2
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 abstract 1
- 239000004088 foaming agent Substances 0.000 abstract 1
- 238000010438 heat treatment Methods 0.000 abstract 1
- 238000003913 materials processing Methods 0.000 abstract 1
- 239000011575 calcium Substances 0.000 description 8
- 238000009413 insulation Methods 0.000 description 8
- 229910052782 aluminium Inorganic materials 0.000 description 7
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 7
- 239000010935 stainless steel Substances 0.000 description 7
- 229910001220 stainless steel Inorganic materials 0.000 description 7
- 239000000956 alloy Substances 0.000 description 6
- 239000000463 material Substances 0.000 description 5
- 239000000155 melt Substances 0.000 description 5
- 238000002360 preparation method Methods 0.000 description 5
- 239000004411 aluminium Substances 0.000 description 4
- 238000010907 mechanical stirring Methods 0.000 description 4
- 229910045601 alloy Inorganic materials 0.000 description 3
- 238000005520 cutting process Methods 0.000 description 3
- 239000001095 magnesium carbonate Substances 0.000 description 3
- ZLNQQNXFFQJAID-UHFFFAOYSA-L magnesium carbonate Chemical compound [Mg+2].[O-]C([O-])=O ZLNQQNXFFQJAID-UHFFFAOYSA-L 0.000 description 3
- 229910000021 magnesium carbonate Inorganic materials 0.000 description 3
- 229960001708 magnesium carbonate Drugs 0.000 description 3
- 235000014380 magnesium carbonate Nutrition 0.000 description 3
- 239000011159 matrix material Substances 0.000 description 3
- 238000005096 rolling process Methods 0.000 description 3
- 239000007921 spray Substances 0.000 description 3
- 239000003381 stabilizer Substances 0.000 description 3
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- 229910000881 Cu alloy Inorganic materials 0.000 description 2
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 2
- 238000005266 casting Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- -1 magnesium-aluminum-calcium Chemical compound 0.000 description 2
- 229910052727 yttrium Inorganic materials 0.000 description 2
- VWQVUPCCIRVNHF-UHFFFAOYSA-N yttrium atom Chemical compound [Y] VWQVUPCCIRVNHF-UHFFFAOYSA-N 0.000 description 2
- 239000011701 zinc Substances 0.000 description 2
- 229910052725 zinc Inorganic materials 0.000 description 2
- 229910000882 Ca alloy Inorganic materials 0.000 description 1
- 238000005275 alloying Methods 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 230000005496 eutectics Effects 0.000 description 1
- 239000006261 foam material Substances 0.000 description 1
- 238000007731 hot pressing Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 229910001092 metal group alloy Inorganic materials 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 238000010117 thixocasting Methods 0.000 description 1
- 229910000048 titanium hydride Inorganic materials 0.000 description 1
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Abstract
The invention belongs to the fields of metal materials, functional materials and materials processing, and relates to a method for preparing a foam magnesium alloy specially-shaped piece and a composite piece with a metal shell and a foam magnesium alloy core by a secondary foaming method, which solves the problems of higher requirements on equipment, complicated processes and the like in the prior art. The method comprises the following steps of: (1) heating a magnesium alloy under the protection of SF6 and CO2 until the magnesium alloy is melted, adding Ca and SiC particles into the melted magnesium alloy for flame retardant and viscosity addition, adding a foaming agent, uniformly stirring, quickly cooling, and thus obtaining a foaming precursor; and (2) performing processing deformation on the foaming precursor to obtain the precursor in a required shape, putting into a foaming mold or a hollow piece for foaming, cooling, and thus obtaining the foam magnesium alloy specially-shaped piece or the foam magnesium alloy core composite structural piece. The method is used for preparing a closed cell foam magnesium alloy or a member containing the closed cell foam magnesium alloy, and the compression strength is improved.
Description
Technical field
The invention belongs to metallic substance and functional materials and material processing field, relate to and a kind ofly utilize two steps foaming to prepare the foam aluminum alloy shaped piece and have metal shell and the method for foam aluminum alloy core composite members.
Background technology
Foamed metal is to contain millimeter or the metallic substance of submillimeter level micropore in the matrix, the characteristics such as it has, and density is little, specific tenacity large, easily processing, heat-resisting, sound insulation, heat insulation, electromagnetic shielding and high damping.In addition, magnesium alloy is as the lightest structured material of using at present, have the advantages such as casting processing performance that density is low, specific tenacity is high, Young's modulus is low, electromagnetic wave shielding is good and good, the foam aluminum alloy of comprehensive foamed metal and magnesium alloy two aspect advantages has huge application potential.
At present, a lot of methods that prepare foam have been arranged: Gu/gas eutectic solidification method, lost wax process, thixo casting method, powder metallurgic method, vacuum seepage casting, vacuum foam method, Melt Direct Foaming etc.Wherein, Melt Direct Foaming is because to have a cost low, and technique is simple and can prepare the large size foam materials and become a preparation foam aluminum alloy method with the bright outlook.But be not suitable for preparing the shaped piece of complex contour, thereby limited the application of foam magnesium.
Chinese invention patent application (number of patent application: 200510038183.7), utilize two steps foaming to prepare the technology of foam aluminium alloy, but the presoma behind the one step foaming need to be incubated 0.3～3h under 300 ℃～500 ℃ temperature, then hot pressing under 100～1000MPa, complex process is to having relatively high expectations of equipment.The second time of foaming temperature is 650 ℃～850 ℃, is higher than the liquidus line of most aluminium alloys and part copper alloy, is not suitable for preparing outer composite members for aluminium alloy or copper alloy.
Summary of the invention
The object of the present invention is to provide a kind of method of utilizing two steps foaming to prepare foam aluminum alloy shaped piece and composite members, solve the problems such as higher to equipment requirements in the prior art, complex process.
Technical scheme of the present invention is:
Two steps foaming prepares the method for foam aluminum alloy shaped piece and composite members, comprises the steps:
(1) magnesium alloy fused mass is added after fire retardant and viscosity increaser carry out fire-retardant and increase glutinous the processing, add account for fire-retardant and increase glutinous the processing after melt total mass 1%～20% (preferable range is 5～10wt%) whipping agent, and utilizes churned mechanically method to stir; With melt cooling, solidify, obtain foam aluminum alloy foaming presoma;
(2) the foam magnesium presoma is carried out deformation processing, obtain required size and dimension;
(3) presoma that will foam is put into mould, together is warming up to blowing temperature with stove, foams; Take out air cooling after foaming finishes, open mould and can obtain the foam magnesium shaped piece;
Perhaps, will put into through the foam magnesium presoma after the deformation processing needs compound Cavity structural member, together is warming up to blowing temperature with stove, is incubated and takes out cooling after 10～20 minutes, can obtain the foam magnesium composite members.
Described two steps foaming prepares the method for foam aluminum alloy shaped piece and composite members, and in the step (3), blowing temperature is 550 ℃～650 ℃.
Described two steps foaming prepares the method for foam aluminum alloy shaped piece and composite members, and fire retardant adopts metal Ca or rare earth element, the fire retardant add-on account for magnesium alloy fused mass weight 0.1%～5% (preferable range is 0.5～2wt%).
Described two steps foaming prepares the method for foam aluminum alloy shaped piece and composite members, viscosity increaser adopts magnesium oxide, aluminum oxide or silicon carbide, median size 5～1000 μ m (preferable range is 10～20 μ m), viscosity increaser account for magnesium alloy fused mass weight 1%～30% (preferable range is 2～5wt%).
Described two steps foaming prepares the method for foam aluminum alloy shaped piece and composite members, and whipping agent adopts carbonate (calcium carbonate or magnesiumcarbonate etc.) or metal hydride.
The invention has the beneficial effects as follows:
1, the present invention also is not seen in patent report with the preparation that two steps foaming is applied to foam magnesium shaped piece or composite members, and the patent of utilizing similar method preparation bubble aluminium composite members is arranged at present.But its preparation temperature interval is higher, is only suitable for preparing the higher composite members of housing fusing point, and under the same porosity, the foamed aluminium mean density also will exceed foam magnesium about 50%.The present invention is heated to fusing with magnesium alloy under gas shield; the particles such as adding Ca and SiC carry out fire-retardant and increase glutinous; stir after adding whipping agent; fast cooling to the foaming precursor; the precursor that will foam is carried out machining deformation, obtains desired shape, inserts in foaming mould or the hollow member and foams; cooling obtains foam aluminum alloy shaped piece or structural part, improves ultimate compression strength.
2, the present invention is for the preparation of the closed-cell foam magnesium alloy or contain the member of closed-cell foam magnesium alloy.
Description of drawings
Fig. 1 is the sectional view of the composite members of the foam magnesium for preparing of the present invention and aluminum pipe.
Fig. 2 is the sectional view of the composite members of the foam magnesium for preparing of the present invention and stainless steel tube.
Fig. 3 is the foam magnesium for preparing of the present invention and the quasistatic stress under compression strain figure of stainless steel tube composite members.
Embodiment
Embodiment 1:
Present embodiment foam magnesium basic material is the magnesium alloy (magnesium surplus) that contains aluminium 9wt%, zinc 1wt%.Two steps foaming prepares the method for foam aluminum alloy shaped piece, may further comprise the steps:
The first step: at CO
2: SF
6Under the atmosphere of=500: 1 (volume ratio), alloy material is heated to 720 ℃ of lower fusings, obtains magnesium alloy fused mass;
Second step: behind the insulation 30min, adding the metal Ca account for step 1 gained melt 1wt%, to carry out alloy fire-retardant.All be cooled to 630 ℃ after the dissolving until Ca, add account for the described melt 5wt% of step 1, median size be the SiC particle of 10 μ m as viscosity increaser (bubble stabilizer), stir 5min to evenly with the mechanical stirring oar with the speed of 1400rpm immediately.
The 3rd step: behind the melt cooling to 590 that step 2 is obtained ℃, add the carbonate (in the present embodiment account for the melt 3wt% that step 2 obtains, carbonate is specially magnesiumcarbonate) as whipping agent, extremely even with the speed stirring 1min of 1400rpm with the mechanical stirring oar immediately.
The 4th step: adopt the water-cooled method of the outside spray of crucible, melt is cooled off fast, solidifies, obtain foam aluminum alloy foaming presoma.
The 5th step: the foam magnesium presoma is carried out deformation processing (comprising cutting, extruding or rolling), obtain the size and dimension of desired size.
The 6th step: the foaming presoma after the deformation processing is put into mould, together be warming up to 650 ℃ of blowing temperatures with stove, take out cooling behind the insulation 15min, open mould and can obtain the foam magnesium shaped piece.
Embodiment 2:
The material of present embodiment foam magnesium matrix is the magnesium alloy (magnesium surplus) that contains aluminium 12wt%, zinc 1wt%, and the present embodiment two steps foaming prepares the method for foam aluminum alloy composite members, may further comprise the steps:
The first step: at CO
2: SF
6Under the atmosphere of=500: 1 (volume ratio) alloy material being heated to 720 ℃ melts down.
Second step: behind the insulation 30min, adding the metal Ca account for step 1 gained melt 0.8wt%, to carry out alloy fire-retardant.All be cooled to 580 ℃ after the dissolving until Ca, add massfraction account for the described melt 8wt% of step 1, median size be the SiC particle of 20 μ m as viscosity increaser (bubble stabilizer), stir 5min to evenly with the mechanical stirring oar with 1400rpm immediately.
The 3rd step: with step 2 obtain be cooled to 580 ℃ after, add carbonate (in the present embodiment, carbonate the is specially magnesiumcarbonate) whipping agent account for the melt total mass 3wt% that step 2 obtains, and stir.
The 4th step: adopt the water-cooled method of the outside spray of crucible, cool off fast, solidify, obtain foam aluminum alloy foaming presoma.
The 5th step: the foam magnesium presoma is carried out deformation processing (comprising cutting, extruding or rolling), obtain the size and dimension of desired size.
The 6th goes on foot: the foam magnesium presoma is put into needs compound Cavity structural member, together is warming up to 650 ℃ with stove, takes out cooling behind the insulation 14min, can obtain the foam magnesium composite members.
The material of present embodiment foam magnesium matrix is conventional magnesium-aluminum-calcium alloy, and alloying constituent is: Mg 80%～90%; Al9%～19%; (in the present embodiment, Mg 85% for Ca 1～5%; Al 12%; Ca 3%).The present embodiment two steps foaming prepares the method for foam aluminum alloy composite members, may further comprise the steps:
The first step: at CO
2: SF
6Under the atmosphere of=500: 1 (volume ratio) alloy material being heated to 720 ℃ melts down.
Second step: behind the insulation 30min, adding the rare earth element yttrium account for step 1 gained melt 0.2wt%, to carry out alloy fire-retardant.All be cooled to 630 ℃ after the dissolving until rare earth element yttrium, add massfraction account for the described melt 10wt% of step 1, median size be the alumina particle of 20 μ m as viscosity increaser (bubble stabilizer), stir 5min to evenly with the mechanical stirring oar with 1400rpm immediately.
The 3rd step: with step 2 obtain be cooled to 600 ℃ after, add metal hydride (in the present embodiment, metal hydride the is specially titanium hydride) whipping agent account for the melt total mass 1.6wt% that step 2 obtains, and stir.
The 4th step: adopt the water-cooled method of the outside spray of crucible, cool off fast, solidify, obtain foam aluminum alloy foaming presoma.
The 5th step: the foam magnesium presoma is carried out deformation processing (comprising cutting, extruding or rolling), obtain the size and dimension of desired size.
The 6th step: the foam magnesium presoma is put into the composite members mould, together be warming up to 650 ℃ with stove, take out cooling behind the insulation 15min, can obtain the foam magnesium composite members.
As shown in Figure 1, can find out from the composite members sectional view of foam magnesium and aluminum pipe: foam magnesium is evenly distributed aluminum pipe.
As shown in Figure 2, can find out from the composite members sectional view of foam magnesium and stainless steel tube: foam magnesium is evenly distributed stainless steel tube.
As shown in Figure 3, can find out from the quasistatic compression performance of foam magnesium filling stainless steel tube: stainless steel tube is after foam magnesium is filled, and the ultimate compression strength of stainless steel tube obviously rises.
Claims (2)
1. two steps foaming prepares the method for foam aluminum alloy shaped piece and composite members, it is characterized in that, comprises the steps:
(1) magnesium alloy fused mass is added after fire retardant and viscosity increaser carry out fire-retardant and increase glutinous the processing, add and account for fire-retardant and increase the whipping agent of melt total mass 1%～20% after glutinous the processing, and utilize churned mechanically method to stir; With melt cooling, solidify, obtain foam aluminum alloy foaming presoma;
(2) the foam magnesium presoma is carried out deformation processing, obtain required size and dimension;
(3) presoma that will foam is put into mould, together is warming up to blowing temperature with stove, foams; Take out air cooling after foaming finishes, open mould and can obtain the foam magnesium shaped piece;
Perhaps, will put into through the foam magnesium presoma after the deformation processing needs compound Cavity structural member, together is warming up to blowing temperature with stove, is incubated and takes out cooling after 10-20 minute, can obtain the foam magnesium composite members;
Fire retardant adopts metal Ca or rare earth element, and the fire retardant add-on accounts for 0.1%～5% of magnesium alloy fused mass weight;
Viscosity increaser adopts magnesium oxide, aluminum oxide or silicon carbide, median size 5～1000 μ m, and viscosity increaser accounts for 1%～30% of magnesium alloy fused mass weight;
Whipping agent adopts carbonate or metal hydride;
2. prepare the method for foam aluminum alloy shaped piece and composite members according to two steps foaming claimed in claim 1, it is characterized in that, in the step (3), blowing temperature is 550 ℃～650 ℃.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201010288087 CN102409194B (en) | 2010-09-21 | 2010-09-21 | Method for preparing foam magnesium alloy specially-shaped piece and composite piece by secondary foaming method |
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| CN 201010288087 CN102409194B (en) | 2010-09-21 | 2010-09-21 | Method for preparing foam magnesium alloy specially-shaped piece and composite piece by secondary foaming method |
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| CN102409194A CN102409194A (en) | 2012-04-11 |
| CN102409194B true CN102409194B (en) | 2013-03-27 |
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| CN104858232B (en) * | 2015-05-25 | 2017-03-08 | 刘志民 | A kind of preparation method of foam metal difference thickness sheet metal component |
| CN107267794B (en) * | 2017-06-30 | 2018-11-13 | 陈新忠 | A kind of automation continous way foaming production technology |
| CN107858542B (en) * | 2017-12-07 | 2019-11-05 | 河北工业大学 | A kind of micron pore size closed-cell foam composite material of magnesium alloy preparation method |
| CN108467961B (en) * | 2018-02-06 | 2020-08-14 | 四川大学 | Multifunctional foamed aluminum foaming agent and method for preparing foamed aluminum by using same |
| CN109778036B (en) * | 2019-03-04 | 2020-10-16 | 东南大学 | Foam alloy for foaming in space environment and preparation method thereof |
| CN110373563B (en) * | 2019-08-26 | 2020-06-23 | 南昌航空大学 | Foam magnesium composite board and preparation method thereof |
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| CN1274856C (en) * | 2003-11-14 | 2006-09-13 | 南昌航空工业学院 | Process for preparing foam magnesium |
| CN1273630C (en) * | 2005-01-20 | 2006-09-06 | 东南大学 | Production of foamed aluminium alloy deformed piece by secondary foam |
| CN100439525C (en) * | 2005-11-16 | 2008-12-03 | 中国科学院金属研究所 | Process for preparing foam magnesium by direct foaming of melt mass |
| CN101473055B (en) * | 2006-07-06 | 2012-10-10 | 洛特斯合金有限公司 | Method for manufacturing porous body |
| CN101463434B (en) * | 2009-01-14 | 2010-12-08 | 河北工业大学 | Preparation of foam magnesium alloy |
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