EP2427284A2 - Powder-metallurgical method for producing metal foam - Google Patents
Powder-metallurgical method for producing metal foamInfo
- Publication number
- EP2427284A2 EP2427284A2 EP10736959A EP10736959A EP2427284A2 EP 2427284 A2 EP2427284 A2 EP 2427284A2 EP 10736959 A EP10736959 A EP 10736959A EP 10736959 A EP10736959 A EP 10736959A EP 2427284 A2 EP2427284 A2 EP 2427284A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- powder
- metal
- metal foam
- mass
- underlying
- 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.)
- Granted
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/10—Sintering only
- B22F3/11—Making porous workpieces or articles
- B22F3/1121—Making porous workpieces or articles by using decomposable, meltable or sublimatable fillers
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/04—Making non-ferrous alloys by powder metallurgy
- C22C1/0408—Light metal alloys
- C22C1/0416—Aluminium-based alloys
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/08—Alloys with open or closed pores
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/11—Making amorphous alloys
Definitions
- the invention relates to a powder metallurgical process for the production of metal foam.
- a process for the production of metal foams with blowing agent or gas-releasing agent (eg US 3,087,807 - ZrH 1 , O i as gas-releasing agent; US 2,935,396 - CdCO 3 or MgCO 3 as gas-releasing agent; US 2,983,597 - TiH 2 or ZrH 2 as blowing agent ) have been known for a long time.
- blowing agent or gas-releasing agent eg US 3,087,807 - ZrH 1 , O i as gas-releasing agent; US 2,935,396 - CdCO 3 or MgCO 3 as gas-releasing agent; US 2,983,597 - TiH 2 or ZrH 2 as blowing agent
- Powder metallurgical processes for the production of metal foams have also been developed for years and the metal foams produced have been investigated for their properties.
- such a powder metallurgical process comprises the following process steps: mixing at least one metal powder and one blowing agent powder, then compacting to form a dense, foamable semi-finished product. If this semifinished product is heated above the melting point, it expands and the metal is converted into a semi-liquid, viscous state, at the same time releasing gas from the decomposing propellant and foaming the semifinished product.
- DE 101 15 230 A1 describes a powder metallurgical process in which a metal compound is selected as the propellant-containing powder whose metal component consists exclusively of one or more metals of the powdery metallic material to be foamed, in order to the metal component to change the alloy composition to a small extent and to cause no metallic impurities.
- Preferred propellants are salts which are selected from acetates, hydrates, hydroxides, hydrides and carbonates or mixed salts thereof and which are particularly efficient gas formers which, when decomposed, preferably form hydrogen, carbon dioxide, carbon monoxide, water and / or methane.
- DE 10 2005 037 305 A1 describes a process in which the metal powder was first pressed under mechanical pressure and a temperature of up to 400 ° C. to form a dimensionally stable semifinished product, then in a pressure-tight chamber at a selected initial pressure of is heated up to 5 MPa to the melting or the solidus temperature of the metal powder. After reaching this temperature, the pressure is reduced defined, the semi-finished foams up, the resulting metal foam solidifies during the final lowering of the temperature.
- This method is relatively expensive due to the necessity of pressure-tight containers.
- the powder metallurgical process comprises
- Production of metal foam at least the method steps: Mixing of a metal powder from at least the metal underlying the metal foam or the metals underlying the metal foam with Al (1 -x) Mg (x) with 10 mass% ⁇ x ⁇ 100 mass% as a gas generator in the form of metal powder in a concentration of 4 to 50
- pre-alloyed Al-Mg metal powder is used.
- the compacting of the metal powder mixture takes place for example by means of uniaxial compaction or by extrusion.
- Al powder or Zn powder in a concentration of 50 to 96% by mass with Al (1 -x) Mg (x) is mixed as a remainder.
- Al powder or Zn powder in a concentration of 50 to 96% by mass with Al (1 -x) Mg (x) is mixed as a remainder.
- up to 40 mass% Cu powder or up to 15 mass% Si powder or up to 40 mass% Zn powder may optionally be used.
- the lowering of the melting temperature of a Zn-based alloy is e.g. realized by the use of up to 6% by mass of Al powder instead of the Zn powder.
- the invention also relates to the use of Al (1-x) Mg (x) alloy with 10 mass% ⁇ x ⁇ 100 mass% both as a gas generator and as an alloying ingredient in the production of metal foams.
- Another advantage of the invention is - as already mentioned - is that with the admixture of Al (1-x) Mg (x) powder with 10 mass% ⁇ x ⁇ 100 mass% of the melting point of the AI or Zn-based Alloy was lowered.
- Fig. 1 Recording of an Al-based metal foam according to the prior
- FIG. 2 Recording of an Al-based metal foam produced according to the inventive method
- FIG. 3 Microscope image of a Zn-based metal foam produced by the method according to the invention
- FIG. 5 Stress-pressure behavior of the Al-based metal foam according to FIG. 5
- FIG. 6 Projection area extent of a Zn-based metal foam and temperature of the foaming process as a function of time.
- FIGS. 1 and 2 each show, for comparison, a receptacle of an Al-based metal foam produced in accordance with a known one powder metallurgical process with blowing agent (FIG. 1) and without blowing agent (FIG. 2), ie produced according to the process of the invention.
- FIGS. 1 and 2 each show, for comparison, a receptacle of an Al-based metal foam produced in accordance with a known one powder metallurgical process with blowing agent (FIG. 1) and without blowing agent (FIG. 2), ie produced according to the process of the invention.
- FIGS. 1 and 2 each show, for comparison, a receptacle of an Al-based metal foam produced in accordance with a known one powder metallurgical process with blowing agent (FIG. 1) and without blowing agent (FIG. 2), ie produced according to the process of the invention.
- FIGS. 1 and 2 each show, for comparison, a receptacle of an Al-based metal foam produced in accord
- a powder mixture of 94% by mass Zn powder and 6% by mass AIMg50 powder is prepared to produce a metal foam 0 C and 300 MPa is compacted.
- the foaming process then takes place at 400 ° C.
- the average diameter of the pores is 500 microns, the sample density 1, 1 like "3 .
- FIG. 4 shows a microscope image of the foam structure of an Al-based metal foam produced by the method according to the invention, now at a higher magnification than in Fig. 1.
- This metal foam is prepared as follows: For the preparation of the powder mixture is 60 mass% AI powder and 30 mass% AIMg50 powder and 10 mass% Cu powder used. The Cu powder was added to lower the melting point of the alloy. The compaction takes place at 400 0 C and a pressure of 300 MPa. For the foaming of the compacted sample, a temperature of 600 0 C is set. The Al-based metal foam thus prepared has a density of 0.6 "3" and pores having an average diameter of 800 ⁇ m.
- FIG. 5 shows the curve for the stress-strain behavior of a metal foam with the composition AIMgI 5Cu10, which has a density of 0.72 "3 and an average diameter of the pores of 1 mm produced metal foams have shown that its compressive strength and rigidity are at least as good as other standard foams.
- the projection area extent (expansion of the area of the metal foam in the plan view) of a Zn-based metal foam of composition ZnAl5Mg5 and the temperature of the foaming process are shown as a function of time in FIG. It can be seen that the area grows to about four times its original size in the foaming process. That is, there is sufficient foam expansion and the foam remains very stable in the expanded, liquid state without collapsing after a predetermined period of time, as is common in foams made by prior art methods with blowing agents.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Powder Metallurgy (AREA)
- Manufacture Of Metal Powder And Suspensions Thereof (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102009020004A DE102009020004A1 (en) | 2009-05-05 | 2009-05-05 | Powder metallurgical process for the production of metal foam |
PCT/DE2010/000512 WO2010127668A2 (en) | 2009-05-05 | 2010-04-30 | Powder-metallurgical method for producing metal foam |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2427284A2 true EP2427284A2 (en) | 2012-03-14 |
EP2427284B1 EP2427284B1 (en) | 2014-12-31 |
Family
ID=42932377
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP10736959.7A Active EP2427284B1 (en) | 2009-05-05 | 2010-04-30 | Powder-metallurgical method for producing metal foam |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP2427284B1 (en) |
DE (1) | DE102009020004A1 (en) |
WO (1) | WO2010127668A2 (en) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20110111250A1 (en) * | 2009-11-10 | 2011-05-12 | Ken Evans | Process for producing a foamed metal article |
DE102011089566A1 (en) | 2011-12-22 | 2013-06-27 | Tesa Se | Liner for the protection of adhesives |
CN107763371B (en) * | 2017-10-27 | 2019-09-27 | 合肥紫金钢管股份有限公司 | A kind of processing technology of steel sleeve steel heat preservation steam steel pipe |
DE102021126310A1 (en) | 2021-10-11 | 2023-04-13 | HAVEL metal foam GmbH | Method and device for producing a foamable, band-shaped pressed powder metal blank by means of cold rolling and pressed powder metal blank |
CN114905040B (en) * | 2022-05-13 | 2023-08-08 | 广州大学 | Density gradient foam metal and preparation method and application thereof |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2935396A (en) | 1957-03-07 | 1960-05-03 | Dow Chemical Co | Cellularized light metal |
US2983597A (en) | 1959-06-11 | 1961-05-09 | Lor Corp | Metal foam and method for making |
US3087807A (en) | 1959-12-04 | 1963-04-30 | United Aircraft Corp | Method of making foamed metal |
DE2006445C3 (en) * | 1969-02-19 | 1975-01-02 | Ethyl Corp., Richmond, Va. (V.St.A.) | Process for the production of aluminum foam moldings |
JPS5440209A (en) * | 1977-09-07 | 1979-03-29 | Nippon Dia Clevite Co | Method of producing porous body of aluminum and alloys thereof |
DE19849600C1 (en) * | 1998-10-28 | 2001-02-22 | Schunk Sintermetalltechnik Gmb | Process for the production of a metallic composite |
DE10115230C2 (en) | 2000-03-28 | 2002-11-28 | Fraunhofer Ges Forschung | Process for producing porous metal bodies and use thereof |
RU2200647C1 (en) * | 2001-07-17 | 2003-03-20 | Литвинцев Александр Иванович | Method for making porous semifinished products of aluminium alloy powders |
AT413344B (en) * | 2003-01-13 | 2006-02-15 | Arc Leichtmetallkompetenzzentrum Ranshofen Gmbh | METHOD FOR PRODUCING METAL FOAM BODIES |
DE102005037305B4 (en) * | 2005-08-02 | 2007-05-16 | Hahn Meitner Inst Berlin Gmbh | Process for the powder metallurgy production of metal foam and parts made of metal foam |
-
2009
- 2009-05-05 DE DE102009020004A patent/DE102009020004A1/en not_active Ceased
-
2010
- 2010-04-30 WO PCT/DE2010/000512 patent/WO2010127668A2/en active Application Filing
- 2010-04-30 EP EP10736959.7A patent/EP2427284B1/en active Active
Non-Patent Citations (1)
Title |
---|
See references of WO2010127668A2 * |
Also Published As
Publication number | Publication date |
---|---|
EP2427284B1 (en) | 2014-12-31 |
DE102009020004A1 (en) | 2010-11-11 |
WO2010127668A3 (en) | 2011-03-24 |
WO2010127668A2 (en) | 2010-11-11 |
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