CN102409194A - 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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- CN102409194A CN102409194A CN2010102880879A CN201010288087A CN102409194A CN 102409194 A CN102409194 A CN 102409194A CN 2010102880879 A CN2010102880879 A CN 2010102880879A CN 201010288087 A CN201010288087 A CN 201010288087A CN 102409194 A CN102409194 A CN 102409194A
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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 the second time of foaming legal system to be equipped with 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 the millimeter or the metallic substance of submillimeter level micropore in the matrix, characteristics such as it has, and density is little, specific tenacity big, be prone to processing, heat-resisting, sound insulation, heat insulation, electromagnetic shielding and high damping.In addition; Magnesiumalloy 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 magnesiumalloy two aspect advantages has huge application potential.
At present, a lot of preparation foamy methods have been arranged: Gu/gas eutectic solidification method, lost wax process, thixo casting method, powder metallurgic method, vacuum seepage casting, vacuum foaming, direct foaming of melt mass method etc.Wherein, the direct foaming of melt mass method is because to have a cost low, and technology is simple and can prepare the large size foam materials and become a preparation foam aluminum alloy method with bright prospect.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 the second time of foaming legal system to be equipped with the technology of foam aluminium alloy; But need the presoma behind the one step foaming be incubated 0.3～3h under 300 ℃～500 ℃ temperature; Hot pressing under 100～1000MPa then, 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 duraluminums and part copper alloy, is not suitable for preparing outer composite members for duraluminum or copper alloy.
Summary of the invention
The object of the present invention is to provide a kind of method of utilizing the second time of foaming legal system to be equipped with foam aluminum alloy shaped piece and composite members, solve problems such as higher in the prior art, complex process equipment requirements.
Technical scheme of the present invention is:
The second time of foaming legal system is equipped with the method for foam aluminum alloy shaped piece and composite members, comprises the steps:
(1) with magnesium alloy fused mass add fire retardant and viscosity increaser carry out fire-retardant with increase glutinous the processing after, add to account for and fire-retardantly glutinously handle back melt total mass 1%～20% (preferable range is 5～10wt%) whipping agent, and utilizes churned mechanically method to stir with increasing; Melt is cooled off, solidifies, obtain foam aluminum alloy foaming presoma;
(2) 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; Foaming finishes the back and takes out air cooling, opens mould and can obtain foam magnesium shaped piece;
Perhaps, will pass through foam magnesium presoma after the deformation processing and put into and need the compound Cavity structural member, together be warming up to blowing temperature, and be incubated and take out cooling after 10～20 minutes, can obtain foam magnesium composite members with stove.
Described second time of foaming legal system is equipped with the method for foam aluminum alloy shaped piece and composite members, and in the step (3), blowing temperature is 550 ℃～650 ℃.
Described second time of foaming legal system is equipped with the method for foam aluminum alloy shaped piece and composite members, and fire retardant adopts metal Ca or REE, the fire retardant add-on account for magnesium alloy fused mass weight 0.1%～5% (preferable range is 0.5～2wt%).
Described second time of foaming legal system is equipped with the method for foam aluminum alloy shaped piece and composite members; Viscosity increaser adopts Natural manganese dioxide, aluminum oxide or silit; 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 second time of foaming legal system is equipped with the method for foam aluminum alloy shaped piece and composite members, and whipping agent adopts carbonate (lime 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 the second time of foaming method is applied to foam magnesium shaped piece or composite members, and the patent of the similar methods utilized preparation bubble aluminium composite members is arranged at present.But its preparation temperature interval is higher, only be fit to the higher composite members of preparation 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 magnesiumalloy under gas shield, add particles such as Ca and SiC carry out fire-retardant with increase glutinously, stir behind the adding whipping agent; Refrigerative is to the foaming precursor fast; 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 used to prepare the member that the closed cell magnesiumalloy perhaps contains the closed cell magnesiumalloy.
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 matrix material is the magnesiumalloy (magnesium surplus) that contains aluminium 9wt%, zinc 1wt%.The second time of foaming legal system is equipped with 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 fusings down, 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.Treat that Ca all is cooled to 630 ℃ after the dissolving, add account for the said melt 5wt% of step 1, median size be the SiC particle of 10 μ m as viscosity increaser (bubble stabilizer), stir 5min to even with the mechanical stirring oar with the speed of 1400rpm immediately.
The 3rd step: after the melt that step 2 is obtained is cooled to 590 ℃; 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 mechanical stirring oar immediately with the speed stirring 1min of 1400rpm.
The 4th step: adopt the outside water spray of crucible refrigerative method, melt is cooled off fast, solidifies, obtain foam aluminum alloy foaming presoma.
The 5th step: 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, take out cooling behind the insulation 15min, open mould and can obtain foam magnesium shaped piece with stove.
Embodiment 2:
The material of present embodiment foam magnesium matrix is the magnesiumalloy (magnesium surplus) that contains aluminium 12wt%, zinc 1wt%, and present embodiment second time of foaming legal system is equipped with 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 is heated to 720 ℃ of fusings 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.Treat that Ca all is cooled to 580 ℃ after the dissolving, add massfraction account for the said melt 8wt% of step 1, median size be the SiC particle of 20 μ m as viscosity increaser (bubble stabilizer), stir 5min to even 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 outside water spray of crucible refrigerative method, cool off fast, solidify, obtain foam aluminum alloy foaming presoma.
The 5th step: 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: foam magnesium presoma is put into needs the compound Cavity structural member, together is warming up to 650 ℃ with stove, takes out cooling behind the insulation 14min, can obtain foam magnesium composite members.
The material of present embodiment foam magnesium matrix is conventional magnalium 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%).Present embodiment second time of foaming legal system is equipped with 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 is heated to 720 ℃ of fusings 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.Treat that rare earth element yttrium all is cooled to 630 ℃ after the dissolving; Add massfraction account for the said melt 10wt% of step 1, median size be the alumina particle of 20 μ m as viscosity increaser (bubble stabilizer), stir 5min to even 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 outside water spray of crucible refrigerative method, cool off fast, solidify, obtain foam aluminum alloy foaming presoma.
The 5th step: foam magnesium presoma is carried out deformation processing (comprising cutting, extruding or rolling), obtain the size and dimension of desired size.
The 6th step: foam magnesium presoma is put into the composite members mould, together be warming up to 650 ℃, take out cooling behind the insulation 15min, can obtain foam magnesium composite members with stove.
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 (5)
1. the second time of foaming legal system is equipped with the method for foam aluminum alloy shaped piece and composite members, it is characterized in that, comprises the steps:
(1) with magnesium alloy fused mass add fire retardant and viscosity increaser carry out fire-retardant with increase glutinous the processing after, add account for fire-retardant with increase the glutinous whipping agent of handling back melt total mass 1%～20%, and utilize churned mechanically method to stir; Melt is cooled off, solidifies, obtain foam aluminum alloy foaming presoma;
(2) 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; Foaming finishes the back and takes out air cooling, opens mould and can obtain foam magnesium shaped piece;
Perhaps, will pass through foam magnesium presoma after the deformation processing and put into and need the compound Cavity structural member, together be warming up to blowing temperature, and be incubated and take out cooling after 10-20 minute, can obtain foam magnesium composite members with stove.
2. be equipped with the method for foam aluminum alloy shaped piece and composite members according to the described second time of foaming legal system of claim 1, it is characterized in that, in the step (3), blowing temperature is 550 ℃～650 ℃.
3. be equipped with the method for foam aluminum alloy shaped piece and composite members according to the described second time of foaming legal system of claim 1, it is characterized in that, fire retardant adopts metal Ca or REE, and the fire retardant add-on accounts for 0.1%～5% of magnesium alloy fused mass weight.
4. the method that is equipped with foam aluminum alloy shaped piece and composite members according to the described second time of foaming legal system of claim 1; It is characterized in that; Viscosity increaser adopts Natural manganese dioxide, aluminum oxide or silit, median size 5～1000 μ m, and viscosity increaser accounts for 1%～30% of magnesium alloy fused mass weight.
5. be equipped with the method for foam aluminum alloy shaped piece and composite members according to the described second time of foaming legal system of claim 1, it is characterized in that, whipping agent adopts carbonate or metal hydride.
Priority Applications (1)
| 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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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104858232A (en) * | 2015-05-25 | 2015-08-26 | 刘志民 | Preparation method for foam metal thickness difference sheet metal part |
| CN107267794A (en) * | 2017-06-30 | 2017-10-20 | 长兴嘉诚炉业有限公司 | One kind automation continous way foaming technological process of production |
| CN107858542A (en) * | 2017-12-07 | 2018-03-30 | 河北工业大学 | A kind of micron pore size closed-cell foam composite material of magnesium alloy preparation method |
| CN108467961A (en) * | 2018-02-06 | 2018-08-31 | 四川大学 | A kind of multifunctional foam aluminium foaming agent and the method for preparing foamed aluminium using it |
| CN109778036A (en) * | 2019-03-04 | 2019-05-21 | 东南大学 | A kind of foamed alloy and preparation method for foaming under space environment |
| CN110373563A (en) * | 2019-08-26 | 2019-10-25 | 南昌航空大学 | A kind of foam magnesium composite board and preparation method thereof |
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| CN1966748A (en) * | 2005-11-16 | 2007-05-23 | 中国科学院金属研究所 | Process for preparing foam magnesium by direct foaming of melt mass |
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| US20090317282A1 (en) * | 2006-07-06 | 2009-12-24 | Lotus Alloy Co., Ltd. | Method for manufacturing porous body |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104858232A (en) * | 2015-05-25 | 2015-08-26 | 刘志民 | Preparation method for foam metal thickness difference sheet metal part |
| CN107267794A (en) * | 2017-06-30 | 2017-10-20 | 长兴嘉诚炉业有限公司 | One kind automation continous way foaming technological process of production |
| CN107267794B (en) * | 2017-06-30 | 2018-11-13 | 陈新忠 | A kind of automation continous way foaming production technology |
| CN107858542A (en) * | 2017-12-07 | 2018-03-30 | 河北工业大学 | A kind of micron pore size closed-cell foam composite material of magnesium alloy preparation method |
| CN108467961A (en) * | 2018-02-06 | 2018-08-31 | 四川大学 | A kind of multifunctional foam aluminium foaming agent and the method for preparing foamed aluminium using it |
| CN109778036A (en) * | 2019-03-04 | 2019-05-21 | 东南大学 | A kind of foamed alloy and preparation method for foaming under space environment |
| CN109778036B (en) * | 2019-03-04 | 2020-10-16 | 东南大学 | Foam alloy for foaming in space environment and preparation method thereof |
| CN110373563A (en) * | 2019-08-26 | 2019-10-25 | 南昌航空大学 | A kind of foam magnesium composite board 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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| CN102409194B (en) | 2013-03-27 |
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