EP1434666B1 - Verfahren zur herstellung von metallpulver aus spratzigen teilchen - Google Patents
Verfahren zur herstellung von metallpulver aus spratzigen teilchen Download PDFInfo
- Publication number
- EP1434666B1 EP1434666B1 EP02774152A EP02774152A EP1434666B1 EP 1434666 B1 EP1434666 B1 EP 1434666B1 EP 02774152 A EP02774152 A EP 02774152A EP 02774152 A EP02774152 A EP 02774152A EP 1434666 B1 EP1434666 B1 EP 1434666B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- pouring stream
- stream
- liquid metal
- current
- metal particles
- 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.)
- Expired - Lifetime
Links
- 239000000843 powder Substances 0.000 title claims abstract description 38
- 239000002245 particle Substances 0.000 title claims abstract description 20
- 230000001788 irregular Effects 0.000 title claims abstract description 6
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 6
- 238000000034 method Methods 0.000 claims abstract description 56
- 229910052751 metal Inorganic materials 0.000 claims abstract description 28
- 239000002184 metal Substances 0.000 claims abstract description 28
- 239000007788 liquid Substances 0.000 claims abstract description 27
- 238000013021 overheating Methods 0.000 claims abstract description 8
- 239000000203 mixture Substances 0.000 claims abstract description 5
- 238000006073 displacement reaction Methods 0.000 claims abstract 2
- 229910001338 liquidmetal Inorganic materials 0.000 claims description 41
- 239000002923 metal particle Substances 0.000 claims description 40
- 239000007789 gas Substances 0.000 claims description 29
- 230000001133 acceleration Effects 0.000 claims description 13
- 238000001816 cooling Methods 0.000 claims description 5
- 238000002485 combustion reaction Methods 0.000 claims description 4
- 229910045601 alloy Inorganic materials 0.000 claims description 3
- 239000000956 alloy Substances 0.000 claims description 3
- 230000000694 effects Effects 0.000 claims description 3
- 239000004575 stone Substances 0.000 claims 1
- 239000002912 waste gas Substances 0.000 claims 1
- 238000009826 distribution Methods 0.000 abstract description 2
- 239000013528 metallic particle Substances 0.000 abstract 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 16
- 238000013467 fragmentation Methods 0.000 description 6
- 238000006062 fragmentation reaction Methods 0.000 description 6
- 238000011068 loading method Methods 0.000 description 5
- 230000001154 acute effect Effects 0.000 description 4
- 230000008901 benefit Effects 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 4
- 230000002349 favourable effect Effects 0.000 description 4
- 238000005245 sintering Methods 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 3
- 239000000155 melt Substances 0.000 description 3
- 238000002360 preparation method Methods 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 241000196324 Embryophyta Species 0.000 description 1
- 241000218657 Picea Species 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 238000010420 art technique Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000012512 characterization method Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000001427 coherent effect Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 230000001066 destructive effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000001513 hot isostatic pressing Methods 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005058 metal casting Methods 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 238000000638 solvent extraction Methods 0.000 description 1
- 238000009692 water atomization Methods 0.000 description 1
Images
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
- B22F9/00—Making metallic powder or suspensions thereof
- B22F9/02—Making metallic powder or suspensions thereof using physical processes
- B22F9/06—Making metallic powder or suspensions thereof using physical processes starting from liquid material
- B22F9/08—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying
- B22F9/082—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying atomising using a fluid
-
- 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
- B22F9/00—Making metallic powder or suspensions thereof
- B22F9/02—Making metallic powder or suspensions thereof using physical processes
- B22F9/06—Making metallic powder or suspensions thereof using physical processes starting from liquid material
- B22F9/08—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying
- B22F9/082—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying atomising using a fluid
- B22F2009/088—Fluid nozzles, e.g. angle, distance
Definitions
- the invention relates to a method for producing a surface fissured, so-called spratzigen particles existing Metal powder by applying a pouring stream of a molten metal with a liquid medium.
- Metal powders are predominantly made by splitting a liquid melt into Particles and a subsequent solidification thereof produced.
- a means for a Disintegration of the liquid metal into small droplets are according to the prior art Technique essentially gas or liquid jets known with which high kinetic energy to be acted upon by a melt stream.
- a surface-ragged, so-called spattered powder com is created by a division of the melt stream with liquids, in particular with Water.
- the so-called water atomized metal powder has after drying usually a lower bulk density, although due to the Surface formation, the trickle properties are deteriorated.
- a so-called green body can be created, which through the rugged Surface structure of the grains is porous throughout. It owns the green or pressing before sintering often has a desired stability, the one encourages non-destructive manipulation of the same.
- the syrupy powder form is advantageously suitable from such water-atomized powders by sintering To produce objects that are high, but possibly inhomogeneous have distributed and coherent internal porosity.
- a special field of application for items or machine parts with high internal porosity are maintenance-free bearings, in which the Compounds having cavities filled with lubricant.
- the Pulverkömer should have a spruce surface structure with as many as possible irregular, possibly sharp-edged projections and in the Have substantially the same and low Komong.
- the high-pressure or high-speed water jet can be a annular V-shape or conical shape, an open V-shape, a closed V-shape, a pyramidal shape or have a special shape.
- Another problem is the particle size distribution of water atomized powders because of the proportion of small, possibly suitable for a molding Particles is small and requires a complex classification.
- the invention sets itself the goal of the given disadvantages of the prior To overcome technology and a method of the type mentioned above create, with which metal powder present in narrow limits low Comweights or a high proportion of small Pulverkömern and improved sharp-edged or spratziger surface shape can be produced, which powder more favorable processing properties and higher quality of made of sintered parts.
- the advantages achieved by the invention are essentially to be seen in that the introduction of specific disintegration energy into the liquid metal can be increased significantly and thereby the particle size, the Surface formation as well as the spratentechnik and the homogeneity of the Comweight of the powder are improved. It was found that at one Deflection of the pouring stream from a flow direction by a one-sided Applying particularly favorable surface enlargement and Thinning of the same can be effected.
- the flow direction of the still in Essentially contiguous metal stream is subordinate again by a one-sided admission, preferably by one of the first Deflection opposite side, changed.
- Liquid metal particles have a high kinetic energy when they meet with the at least partially formed with liquid medium high-velocity stream and are shot into it, which also causes the "welled upwater” phenomenon is suppressed.
- the procedure can be carried out if a distraction of the Pouring stream and a surface enlargement of the same in the first Process step and / or a deflection of the surface enlarged Pouring stream and its comminution and an acceleration of the formed Liquid metal particles in the second process step with (one) at least partially done with liquid medium formed streams (current).
- a deflection of the Flow direction and an Oberfumbleenveriererung the pouring stream in the first Process step done with a gas stream is a comparatively achieves lower removal of heat energy from the liquid metal or a Reduction of overheating is reduced, causing a breakdown in liquid metal particles can be promoted with low viscosity.
- a Deflection of the surface-enlarged pouring stream and its fragmentation and an acceleration of the resulting liquid metal particles in the second Process step done with a gas stream.
- This measure provides a lower lowering of the temperature in the near-surface area of the Metal particles, especially in the acceleration of the same and intensified upon impact and / or immersion in the medium formed with liquid medium High-speed stream in the third step, a fracture or Spratzigwerden the surface of the Pulverkömer. It is believed that this beneficial effect through improved surface contact between the metal with a high degree of liquid or with increased overheating and the Liquid medium is provided.
- the method according to the invention has as advantageous in view of a high yield of powder with small grains in more pronounced form when the fragmentation and acceleration of the Liquid metal particles in the second step along a path of at least the diameter of the pouring stream times 10 and that a Pressurized by the high-speed current and the fragmentation short distance with a nozzle pitch of less than the diameter the pouring stream times 8 are performed.
- the invention further aims at an embodiment of the aforementioned Procedure, by which the quality of the powdered powder of some metals and alloys is improved.
- This goal is achieved by a deflection of the pouring stream in its Flow direction and a surface enlargement of the same in the first Process step and / or a deflection of the surface enlarged G confusestrahles and desssen crushing, as well as an acceleration of the formed liquid metal particles in the second step with (a) from heated gas (s) formed stream (streams) take place.
- the gas flow for the first and / or for the second process step to a temperature above room temperature preferably from above 200 ° C, in particular from above 400 ° C, if appropriate is heated by means of a heat exchanger.
- a temperature above room temperature preferably from above 200 ° C, in particular from above 400 ° C
- a gas or gas mixture with a low cooling effect on the Surface of the pouring stream or the liquid metal particles is used.
- a deflection of the pouring stream in its flow direction and a Surface enlargement of the same in the first process step and / or a Deflection of the surface-enlarged pouring stream and its comminution, and an acceleration of the formed liquid metal particles in the second Process step at least partially with each formed during combustion Exhaust stream (streams) take place.
- the advantages achieved are essentially due to the fact that the Gas stream (streams) for the pretreatment or preparation of the pouring stream for a fine division thereof by means of the high-speed current particularly easy way and cheap (will) be created.
- a Combustion of a gas mixture is on the one hand a heating of the Treating gas flow and on the other hand by a resulting Volume increase a favorable increase in intensity of the flow of the same reachable.
- the oxygen content in the Treatment current can be reduced.
- the pouring stream emerging from the distributor can be precisely focused and / or the surface-enlarged pouring stream in the second method step Hot gas applied and processed so that the conditions for a division of the same in the third step in desired high quality metal powder can be reached.
- a device 3 which advantageously as a flat jet nozzle device is formed, acted upon in a first step, the vertical Pouring stream 2 at an acute angle ⁇ with a deflection medium 31, e.g. Water, water-gas mixture or gas, wherein the pouring stream 2 in the area 32nd is so flowed that it is spread surface enlarging.
- a deflection medium 31 e.g. Water, water-gas mixture or gas
- the spread pouring stream 21, the largely or in large areas still is formed coherently or runs, is in the episode of a Applying system 4 with an advantageously formed with a wide shape Mediumsstrahl 41 with an acute angle ⁇ flowed.
- the second step in the area 42 is a repeated distraction of the widened pouring stream 21 and a division of the same in Liquid metal particles 22.
- the Liquid metal particles 22, as set forth by the symbol V accelerated.
- the accelerated liquid metal particles 22 are subsequently in area 52 in a flat high-speed stream 51, which is at an angle ⁇ to the trajectory of Metal particle 22 is directed, introduced or included.
- Another admission system 4 may also have a warm or Hot gas flow 41 create, whichever istls kind without adverse Cooling the surface enlarged pouring stream 21 divided and the Accelerated liquid metal particles.
- the loading systems 3 and 4 can also be at least partially designed as a burner device.
- the liquid Medium in Hochgeschwindigkeiststrom by a temperature increase in Converted vapor mold and with this the liquid metal particles in the third Process step are applied. It can be advantageous that both the Deintegrationsenergie the powder particles with small diameters arise As well as the cooling intensity of the powder particles is increased and that so that a particularly high metal powder quality can be achieved.
Landscapes
- Manufacture Of Metal Powder And Suspensions Thereof (AREA)
- Powder Metallurgy (AREA)
- Springs (AREA)
Description
Wie in schematischer Darstellung aus der Zeichnung Fig. 1 entnehmbar ist, befindet sich in einem metallurgischen Gefäß 1 eine überhitzte Schmelze, die durch einen Düsenstein 11 einen Gießstrahl 2 mit einem Durchmesser D bildend aus diesem in vertikaler Richtung austritt.
Claims (16)
- Verfahren zur Herstellung eines aus oberflächenzerklüfteten, sogenannten spratzigen Teilchen bestehenden Metallpulvers durch Beaufschlagung eines Gießstrahles einer Metallschmelze mit einem flüssigen Medium, dadurch gekennzeichnet, dass in einem ersten Schritt der Gießstrahl in seiner Fließrichtung abgelenkt und oberflächenvergrößert wird, worauf in einem zweiten Schritt eine abermalige Fließrichtungsablenkung des oberflächenvergrößerten Gießstrahles mit einer Zerteilung desselben und eine Beschleunigung der gebildeten Flüssigmetallpartikel entlang einer Wegstrecke erfolgen und in einem dritten Schritt die bewegten Flüssigmetallpartikel mit einem Winkel γ von 10 bis 90 ° zur Bewegungsrichtung derselben mit einem zumindest teilweise mit flüssigem Medium gebildeten Hochgeschwindigkeitsstrom beaufschlagt, zerteilt und die Teilchen erstarren gelassen werden.
- Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass eine Ablenkung des Gießstrahles in seiner Fließrichtung und eine Oberflächenvergrößerung desselben im ersten Verfahrensschritt und/oder eine Ablenkung des oberflächenvergrößerten Gießstrahles und dessen Zerkleinerung sowie eine Beschleunigung der gebildeten Flüssigmetallpartikel im zweiten Verfahrensschritt mit (einem) zumindest teilweise mit flüssigem Medium gebildeten Strömen (Strom) erfolgen.
- Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass eine Ablenkung von der Fließrichtung und eine Oberflächenvergrößerung des Gießstrahles im ersten Verfahrensschritt mit einem Gasstrom erfolgen.
- Verfahren nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass eine Ablenkung des oberflächenvergrößerten Gießstrahles und dessen Zerteilung sowie eine Beschleunigung der dabei gebildeten Flüssigmetallpartikel im zweiten Verfahrensschritt mit einem Gasstrom erfolgen.
- Verfahren nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass der Metallschmelze des Gießstrahles eine derartige Überhitzung erteilt und für die Zerteilung desselben eine solche aufrechterhalten wird, dass bei einer Beaufschlagung der im zweiten Verfahrensschritt gebildeten Flüssigmetallpartikel mit einem Hochgeschwindigkeitsstrom mit zumindest teilweise flüssigem Medium, im dritten Verfahrensschritt in den Metallpartikeln ohne Temperaturausgleich über den Querschnitt eine Oberflächentemperatur von höher als der Solidus-Temperatur der Legierung entspricht, vorliegt.
- Verfahren nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass der beschleunigte Flüssigmetallpartikelstrom mit einem Winkel γ von größer als 45° durch den Hochgeschwindigkeitsstrom beaufschlagt und zerteilt wird.
- Verfahren nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass der Flüssigmetallpartikelstrom durch einen Hochgeschwindigkeits- Flachstrom mit zumindest teilweise flüssigem Medium beaufschlagt und zerteilt wird.
- Verfahren nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, dass die Zerteilung und Beschleunigung der Flüssigmetallpartikel im zweiten Verfahrensschritt entlang einer Wegstrecke von mindestens 10x dem Durchmesser des Gießstrahles erfolgt und dass eine Beaufschlagung durch den Hochgeschwindigkeitsstrom und die Zerteilung aus kurzer Entfemung mit einem Düsenabstand von weniger als 8x dem Durchmesser des Gießstrahles durchgeführt werden.
- Verfahren nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, dass zumindest ein den Gießstrahl beaufschlagendes Medium in einer Flachstrahldüse oder in einer Mehrstrahldüse mit in einer Ebene liegenden Öffnungen ausgeformt wird.
- Verfahren nach einem der Ansprüche 1 bis 9, dadurch gekennzeichnet, dass zumindest ein den Gießstrahl beaufschlagendes Medium in einer Mehrstrahldüse mit zumindest teilweise in mehr als einer Ebene übereinander liegenden Öffnungen ausgeformt wird.
- Verfahren nach einem der Ansprüche 1 bis 10, dadurch gekennzeichnet, dass der Gasstrom für den ersten und/oder für den zweiten Verfahrensschritt auf eine Temperatur von über Raumtemperatur, vorzugsweise von über 200°C, insbesondere von über 400°C gegebenenfalls mittels eines Wärmetauschers und/oder mittels elektrischen Stromes, beispielsweise durch Widerstandselemente, erwärmt wird.
- Verfahren nach einem der Ansprüche 1 bis 11, dadurch gekennzeichnet, dass für den ersten und/oder für den zweiten Verfahrensschritt ein Gas oder Gasgemisch mit geringer Abkühlwirkung auf die Oberfläche des Gießstrahles oder der Flüssigmetallpartikel verwendet wird.
- Verfahren nach einem der Ansprüche 1 bis 12, dadurch gekennzeichnet, dass eine Ablenkung des Gießstrahles in seiner Fließrichtung und eine Oberflächenvergrößerung desselben im ersten Verfahrensschritt und/oder eine Ablenkung des oberflächenvergrößerten Gießstrahles und dessen Zerkleinerung sowie eine Beschleunigung der gebildeten Flüssigmetallpartikel im zweiten Verfahrensschritt zumindest teilweise mit jeweils bei einer Verbrennung gebildeten Abgasstrom (-strömen) erfolgen.
- Verfahren nach Anspruch 13, dadurch gekennzeichnet, dass für den ersten und/oder für den zweiten Verfahrensschritt der Gasstrom jeweils in einem einen Brenner, insbesondere Hochgeschwindigkeitsbrenner enthaltenden Mittel erwärmt und ausgeformt wird.
- Verfahren nach einem der Ansprüche 1 bis 14, dadurch gekennzeichnet, dass ein den Gießstrahl nach seinem Austreten aus dem Düsenstein des Verteilers umgebender Gasstrom vorgewärmt wird.
- Verfahren nach einem der Ansprüche 1 bis 15, dadurch gekennzeichnet, dass das flüssige Medium im Hochgeschwindigkeitsstrom durch eine Temperaturerhöhung in Dampfform übergeführt und mit diesem die Flüssigmetallpartikel im dritten Verfahrensschritt beaufschlagt werden.
Applications Claiming Priority (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT15942001A AT411230B (de) | 2001-10-10 | 2001-10-10 | Verfahren zur herstellung von metallpulver aus spratzigen teilchen |
AT15942001 | 2001-10-10 | ||
AT5152002 | 2002-04-03 | ||
AT5152002A AT412328B (de) | 2002-04-03 | 2002-04-03 | Verfahren zur herstellung von metallpulver |
PCT/AT2002/000284 WO2003031103A1 (de) | 2001-10-10 | 2002-09-30 | Verfahren zur herstellung von metallpulver aus spratzigen teilchen |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1434666A1 EP1434666A1 (de) | 2004-07-07 |
EP1434666B1 true EP1434666B1 (de) | 2005-01-05 |
Family
ID=25608348
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP02774152A Expired - Lifetime EP1434666B1 (de) | 2001-10-10 | 2002-09-30 | Verfahren zur herstellung von metallpulver aus spratzigen teilchen |
Country Status (10)
Country | Link |
---|---|
US (1) | US7309375B2 (de) |
EP (1) | EP1434666B1 (de) |
JP (1) | JP4328204B2 (de) |
CN (1) | CN1290654C (de) |
AT (1) | ATE286446T1 (de) |
BR (1) | BR0213188B1 (de) |
CA (1) | CA2463125C (de) |
DE (1) | DE50201970D1 (de) |
ES (1) | ES2236584T3 (de) |
WO (1) | WO2003031103A1 (de) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR102421026B1 (ko) | 2016-08-24 | 2022-07-14 | 5엔 플러스 아이엔씨. | 저융점 금속 또는 합금 분말 미립화 제조 공정 |
EP3752304B1 (de) | 2018-02-15 | 2023-10-18 | 5n Plus Inc. | Herstellungsverfahren durch verdüsung von metall- oder legierungspulvern mit niedrigem schmelzpunkt |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR877043A (fr) * | 1939-01-18 | 1942-11-25 | Prazisionsguss Fabrik Nu Rnber | Dispositif pour la pulvérisation de métal |
US4298553A (en) * | 1969-09-04 | 1981-11-03 | Metal Innovations, Inc. | Method of producing low oxide metal powders |
US4604306A (en) * | 1985-08-15 | 1986-08-05 | Browning James A | Abrasive blast and flame spray system with particle entry into accelerating stream at quiescent zone thereof |
DE3841068C2 (de) * | 1988-12-07 | 1997-09-04 | Grillo Werke Ag | Zinkpulver für alkalische Batterien und Verfahren zur Herstellung desselben |
US5242110A (en) * | 1991-12-02 | 1993-09-07 | Praxair Technology, Inc. | Method for changing the direction of an atomized flow |
AT409235B (de) * | 1999-01-19 | 2002-06-25 | Boehler Edelstahl | Verfahren und vorrichtung zur herstellung von metallpulver |
-
2002
- 2002-09-30 EP EP02774152A patent/EP1434666B1/de not_active Expired - Lifetime
- 2002-09-30 DE DE50201970T patent/DE50201970D1/de not_active Expired - Lifetime
- 2002-09-30 CN CN02820205.8A patent/CN1290654C/zh not_active Expired - Fee Related
- 2002-09-30 CA CA2463125A patent/CA2463125C/en not_active Expired - Lifetime
- 2002-09-30 WO PCT/AT2002/000284 patent/WO2003031103A1/de active IP Right Grant
- 2002-09-30 US US10/491,795 patent/US7309375B2/en not_active Expired - Lifetime
- 2002-09-30 ES ES02774152T patent/ES2236584T3/es not_active Expired - Lifetime
- 2002-09-30 BR BRPI0213188-9A patent/BR0213188B1/pt not_active IP Right Cessation
- 2002-09-30 JP JP2003534122A patent/JP4328204B2/ja not_active Expired - Fee Related
- 2002-09-30 AT AT02774152T patent/ATE286446T1/de active
Also Published As
Publication number | Publication date |
---|---|
US7309375B2 (en) | 2007-12-18 |
ES2236584T3 (es) | 2005-07-16 |
CN1568239A (zh) | 2005-01-19 |
ATE286446T1 (de) | 2005-01-15 |
BR0213188B1 (pt) | 2011-09-06 |
EP1434666A1 (de) | 2004-07-07 |
JP4328204B2 (ja) | 2009-09-09 |
CN1290654C (zh) | 2006-12-20 |
CA2463125C (en) | 2010-11-16 |
DE50201970D1 (de) | 2005-02-10 |
CA2463125A1 (en) | 2003-04-17 |
BR0213188A (pt) | 2004-08-31 |
US20040245318A1 (en) | 2004-12-09 |
WO2003031103A1 (de) | 2003-04-17 |
JP2005504887A (ja) | 2005-02-17 |
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