CN101092071A - Method for preparing porous metal - Google Patents
Method for preparing porous metal Download PDFInfo
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- CN101092071A CN101092071A CN 200710024898 CN200710024898A CN101092071A CN 101092071 A CN101092071 A CN 101092071A CN 200710024898 CN200710024898 CN 200710024898 CN 200710024898 A CN200710024898 A CN 200710024898A CN 101092071 A CN101092071 A CN 101092071A
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Abstract
The invention discloses a manufacture method for porous metal that includes the following steps: adopting metal board, machining pothole on it; folding each two metal plates to gain structure board, and folding over two structure boards. The priority method is the metal board that one side has pothole and the other side has protuberance. The invention is suitable to produce in large scale, and the material has good intension. It has the feature of elastic distortion and plastic distortion.
Description
Technical field
The present invention relates to the metal material processing field, particularly a kind of preparation method of porous metals.
Background technology
With diversified hole is the microlight-type porous metals of architectural feature owing to realized structural material lightweight (ρ≤1) and multifunction, comprise energy absorption, damping shock absorption, noise reduction, heat, electromagnetic shielding and multi-functional compatibility thereof, become one of current international forward position focus thereby be with a wide range of applications.
Since last century the fifties developed respectively with aluminium base be the base various preparation methods, foam melt method, melt permeating method, powder metallurgy foaming, melt insufflation, solid-state sintering etc.
Germany Fraunhofer research institute packs 316L alloy hollow metal sphere into and carries out compression test in the thin-wall metal structure, discovery is under the situation of the loose hollow ball of packing into, the S. E. A. of the metal of Unit Weight has increased by 10%, and after adopting resin with the hollow ball bonding, the metal energy absorptivity of Unit Weight has increased by 50%, thereby has increased energy absorption capability greatly.
U.S. Georgia engineering college has developed coaxial jetting material and has prepared the hollow ball technology, adopts to contain the pulp preparation hollow wet bulb that titanizing hydrogen presoma and organic binder bond and solvent etc. are formed, and obtains the metal hollow ball by heat-treating methods then.This method makes the cost of hollow ball very high, thereby has limited the extensive of this technology
Industrial applications.
The U.S. has developed a kind of technology that hollow metal sphere is added molten metal.This method is utilized the phenoplasts tiny balls, heats under inert atmosphere, makes the plastics coking, form hollow tiny balls, on the carbon ball, be coated with layer of metal with vapour deposition process then, remove carbon and obtain hollow metal sphere with gasification again, but this method complicated process of preparation, the cost height.
There is following problem in the preparation method of present porous metals: (1) complex process and costing an arm and a leg; (2) control hole configurations difficult; (3) mainly prepare aluminium-based porous metal.
Summary of the invention
It is simple to the invention provides a kind of technology, low-cost and can be applicable to many in the preparation method of porous metals of sheet metals.
A kind of preparation method of porous metals may further comprise the steps:
The first step is got metallic plate, processes pit on metallic plate, obtains having the metallic plate of pit;
Second step, two metallic plates that have pit are superimposed in twos, obtain the cellular construction plate, the cellular construction plate with two or more than two is superimposed together again.
Have the one side depression of pit on the metallic plate of pit among the preparation method of above-mentioned a kind of porous metals, be projection, and this projection be a sphere at another side.
The cellular construction plate is superimposed by the body-centered cubic structure mode among the preparation method of above-mentioned a kind of porous metals.
The preparation method of described a kind of porous metals, it has the method processing of the metallic plate of pit with punching press.
The preparation method of described a kind of porous metals, its metallic plate that has pit also can be processed with the method for roll extrusion.
Spherical pore is a through hole among the preparation method of described a kind of porous metals.
Spherical pore also can be closed pore among the preparation method of described a kind of porous metals.
The preparation method of above-mentioned a kind of porous metals is applied to based in the arbitrary metallic plate of aluminium base, copper base, base steel.
The present invention has following advantage:
(1) production technology of material is simple, is fit to large-scale production, and is with low cost.
The main technique step adopts plastic working shaping to be connected with layer.
(2) shape in hole, gradient are controlled easily, the material that suitable production is bigger.
Adopt the spherical pore diel, realize the material of spherical pore.Change the gradient size of spherical pore diel, can realize the gradient control of material, the size of control mould.
(3) flat layer of material interconnects, and makes material have better intensity.
Compare with the material that the sintering hollow ball forms, each layer of this material all has flat layer to interconnect, and compressive property is better.
(4) make the various forms novel ball porous metals of high finished product rate easily.
The main technique step adopts plastic working shaping to be connected with layer, and technology is simple, so the yield rate height.
(5) can control closed pore, the through-hole structure of material easily.
In the process of punching press, do not crush sheet material and make the closed pore porous metal material.
In the process of punching press, crush a certain position of sheet material and make through-hole porous metal material.
(6) special material structure makes that it is mild that the elastic deformation area becomes in the compression process.Have the advantages that strain and plastic deformation mix.Because the superiors and undermost only be the hemisphere housing, the weakest, at first be bent bent distortion, the housing in the middle of is pressed in the plate of lower floor simultaneously, makes the certain bending of the superiors and undermost edge generation.Along with subsiding of the superiors and undermost housing, the intermediate layer distortion that is squeezed.
Description of drawings
Fig. 1 is one deck 1060 pure aluminum sheets (wt.%Al99.6 that the present invention suppresses; Si0.25; Fe0.35; Cu0.05; Mn0.03; Mg0.03; Zn0.05; Ti0.03), density is ρ=2.7g/cm
3, thickness 1mm.。
Fig. 2 is that the hemisphere diameter that the present invention makes is the body-centered cubic structure porous metals of 8mm.Porosity is 53%.
Fig. 3 is the sample compression stress strain curve that three kinds of thicknesss of slab of the present invention make.
Fig. 4 is sample energy absorption capability and the energy absorption efficiency curve that three kinds of thicknesss of slab of the present invention make.
The specific embodiment
A kind of preparation method of porous metals may further comprise the steps:
The first step is got metallic plate, processes pit on metallic plate, obtains having the metallic plate 1 of pit;
Second step, two metallic plates 1 that have pit are superimposed in twos, obtain cellular construction plate 2, the cellular construction plate 2 with two or more than two is superimposed together again.
Have the one side depression of pit on the metallic plate 1 of pit among the preparation method of above-mentioned a kind of porous metals, be projection, and this projection be a sphere at another side.
The preparation method of described a kind of porous metals, it has the method processing of the metallic plate 1 usefulness punching press of pit.Adopt a cover spherical pore diel, metallic plate is put into mould, forcing press produces pressure and makes the metallic plate plastic deformation, obtains having the metallic plate 1 of hemisphere pit.
The preparation method of described a kind of porous metals, its metallic plate 1 that has pit also can be processed with the method for roll extrusion.Adopt the spherical pore roll die, metallic plate is put into conveyer belt, roll die produces pressure and makes the metallic plate plastic deformation, obtains having the metallic plate 1 of hemisphere pit.
The shape of preparation method's mesopore of described a kind of porous metals can obtain the porous metals of through hole or closed pore by difform mould design.The variation of arranging by bulb-shaped recess on the mould can be controlled the graded of the diameter in the density in hole of the spherical porous metal that makes at last and hole.Can be with the structure in the different adjustment hole of production requirement and material, thickness, porosity and the proportion etc. of plate.
The preparation method of above-mentioned a kind of porous metals is applied to based in the arbitrary metallic plate of aluminium base, copper base, base steel.
Embodiment 1
1, adopts 1060 pure aluminum sheets (wt.%Al99.6 commonly used; Si0.25; Fe0.35; Cu0.05; Mn0.03; Mg0.03; Zn0.05; Ti0.03), density is ρ=2.7g/cm
3, thickness is the aluminium sheet of 0.5mm.
2, utilize the hemispherical diel, punching press has obtained the sheet-metal layers of hemispherical dimples.In the process of punching press, can improve the plasticity of aluminium sheet by heating, make hemisphere layer aluminium sheet.
3, with the sheet-metal layers of multilayer hemispherical dimples, connect into body-centered cubic structure, so just obtained having the body-centered cubic structure porous metals that flat layer links to each other.
1, adopts 1060 pure aluminum sheetses (wt.% Al99.6 commonly used; Si0.25; Fe0.35; Cu0.05; Mn0.03; Mg0.03; Zn0.05; Ti0.03), density is ρ=2.7g/cm
3, thickness is the aluminium sheet of 1mm.
2, utilize the hemispherical diel, punching press has obtained the sheet-metal layers of hemispherical dimples.In the process of punching press, can improve the plasticity of aluminium sheet by heating, make hemisphere layer aluminium sheet.
3, with the sheet-metal layers of multilayer hemispherical dimples, connect into body-centered cubic structure, obtained having the body-centered cubic structure porous metals that flat layer links to each other like this.
Embodiment 3
1, adopts 1060 pure aluminum sheetses (wt.% Al99.6 commonly used; Si0.25; Fe0.35; Cu0.05; Mn0.03; Mg0.03; Zn0.05; Ti0.03), density is ρ=2.7g/cm
3, thickness is the aluminium sheet of 0.8mm.
2, utilize the hemispherical diel, punching press has obtained the sheet-metal layers of hemispherical dimples.In the process of punching press, can improve the plasticity of aluminium sheet by heating, make hemisphere layer aluminium sheet.
3, with the sheet-metal layers of multilayer hemispherical dimples, connect into body-centered cubic structure, obtained having the body-centered cubic structure porous metals that flat layer links to each other like this.
(curve of σ-ε) as can be seen, all is made up of stretch section, mild section and consolidation section three parts in the compression that three kinds of different-thickness aluminium sheets obtain with the ess-strain experiment of the prepared sample of method of the present invention.Online stretch section, compression curve begin to show as the linear elasticity section.Linear at this interval stress and strain, because the superiors and orlop have weak part, produce certain deformation, this stage scope is increased a little, the strain in this stage is less than 10%; At mild section, stress increases less and strain increases rapidly, and the long and flat mild ascent stage makes the continuous body-centered cubic structure porous metals of flat layer that high compression energy absorption performance be arranged; Along with the continuation increase of compression stress, strain continues to increase, when compression strain surpasses 50% (generally between 50%～65%), hole between the housing is densified to and is in contact with one another, so cause the rapid rising of stress, thereby enter the densified stage, σ-ε curve enters the consolidation section.The relatively compression of the three kinds of obtained same aperture of different-thickness aluminium sheet samples (curve of σ-ε), with reducing of plate thickness, the σ of porous metals-ε curve moves down, and compression yield strength descends.But, reduce, so answer apparition to increase as closely knit part aluminium sheet slab-thickness owing to reducing of aluminium plate thickness.
Embodiment 5
The sample that makes with embodiment 1,2,3 is done the energy absorption experiment, the online elastic stage of porous Al alloy as can be seen, and the energy absorption increase is slower, but energy absorption efficiency increases sharply, and reaches peak value when mild section initial stage (20%≤ε≤30%); Along with the increase of strain, energy absorption ability W increases, and energy absorption efficiency E maintains a higher level (more than 50%) at wide region (15%≤ε≤50%).In the consolidation section, along with the increase stress continuation increase of strain, energy absorption efficiency reduces.Along with reducing of aluminium plate thickness, energy absorption ability W reduces, and the peak value of energy absorption efficiency E and peak width change little.
1, adopt Q345 steel sheet commonly used (wt.%C0.18, Si0.43, Mn1.4, P0.014, S0.014)), thickness is the steel sheet of 0.8mm.
2, utilize the hemispherical diel, punching press has obtained the sheet-metal layers of hemispherical dimples.In the process of punching press, can improve the plasticity of steel plate by heating, make hemisphere layer steel sheet.
3, with the sheet-metal layers of multilayer hemispherical dimples, connect into body-centered cubic structure, obtained having the body-centered cubic structure porous metals that flat layer links to each other like this.
Embodiment 7
1, adopts 1060 pure aluminum sheetses (wt.% Al99.6 commonly used; Si0.25; Fe0.35; Cu0.05; Mn0.03; Mg0.03; Zn0.05; Ti0.03), density is ρ=2.7g/cm
3, thickness is the aluminium sheet of 0.8mm.
2, utilize the hemispherical diel, punching press has obtained the sheet-metal layers of hemispherical dimples.In the process of punching press, can improve the plasticity of aluminium sheet by heating, make hemisphere layer aluminium sheet.
3, utilize the mould of punching, the spherical bottom that makes hemisphere layer aluminium sheet is dashed wear, make hemisphere layer aluminium sheet with holes.
4, the sheet-metal layers of the hemispherical dimples that multilayer is with holes connects into body-centered cubic structure, has obtained having the through-hole porous metal of body-centered cubic structure that flat layer links to each other like this.
Claims (8)
1. the preparation method of porous metals is characterized in that may further comprise the steps:
The first step is got metallic plate, processes pit on metallic plate, obtains having the metallic plate (1) of pit;
Second step, two metallic plates (1) that have pit are superimposed in twos, obtain cellular construction plate (2), the cellular construction plate (2) with two or more than two is superimposed together again.
2. the preparation method of a kind of porous metals as claimed in claim 1, the metallic plate (1) that it is characterized in that having pit is gone up the one side depression of pit, be projection at another side, and this projection be a sphere.
3. the preparation method of a kind of porous metals as claimed in claim 2 is characterized in that cellular construction plate (2) is superimposed by the body-centered cubic structure mode.
4. the preparation method of a kind of porous metals as claimed in claim 1 is characterized in that having the method processing of the metallic plate (1) of pit with punching press.
5. the preparation method of a kind of porous metals as claimed in claim 1 is characterized in that having the method processing of the metallic plate (1) of pit with roll extrusion.
6. the preparation method of a kind of porous metals as claimed in claim 1 is characterized in that spherical pore is a through hole.
7. the preparation method of a kind of porous metals as claimed in claim 1 is characterized in that spherical pore is a closed pore.
8. as the preparation method of the arbitrary described a kind of porous metals of claim 1 to 7, it is characterized in that the metallic plate material is any in aluminium base, copper base, base steel or the titanium plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100248986A CN100475529C (en) | 2007-07-09 | 2007-07-09 | Method for preparing porous metal |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100248986A CN100475529C (en) | 2007-07-09 | 2007-07-09 | Method for preparing porous metal |
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| CN101092071A true CN101092071A (en) | 2007-12-26 |
| CN100475529C CN100475529C (en) | 2009-04-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2007100248986A Expired - Fee Related CN100475529C (en) | 2007-07-09 | 2007-07-09 | Method for preparing porous metal |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102416756A (en) * | 2011-08-25 | 2012-04-18 | 陆学中 | Processing process for hollow metal plate |
| CN111106270A (en) * | 2018-10-26 | 2020-05-05 | 宁德新能源科技有限公司 | Multilayer sheet and battery |
| CN111346917A (en) * | 2020-04-08 | 2020-06-30 | 鞍钢股份有限公司 | Method for manufacturing foam steel |
-
2007
- 2007-07-09 CN CNB2007100248986A patent/CN100475529C/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102416756A (en) * | 2011-08-25 | 2012-04-18 | 陆学中 | Processing process for hollow metal plate |
| CN102416756B (en) * | 2011-08-25 | 2014-06-11 | 陆学中 | Processing process for hollow metal plate |
| CN111106270A (en) * | 2018-10-26 | 2020-05-05 | 宁德新能源科技有限公司 | Multilayer sheet and battery |
| CN111346917A (en) * | 2020-04-08 | 2020-06-30 | 鞍钢股份有限公司 | Method for manufacturing foam steel |
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| Publication number | Publication date |
|---|---|
| CN100475529C (en) | 2009-04-08 |
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Granted publication date: 20090408 Termination date: 20120709 |