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1. WO1999028068 - METHOD OF MANUFACTURING ALUMINIDE SHEET BY THERMOMECHANICAL PROCESSING OF ALUMINIDE POWDERS

Publication Number WO/1999/028068
Publication Date 10.06.1999
International Application No. PCT/US1998/025204
International Filing Date 04.12.1998
Chapter 2 Demand Filed 02.07.1999
IPC
B22F 3/18 2006.1
BPERFORMING OPERATIONS; TRANSPORTING
22CASTING; POWDER METALLURGY
FWORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
3Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor
18by using pressure rollers
B22F 5/00 2006.1
BPERFORMING OPERATIONS; TRANSPORTING
22CASTING; POWDER METALLURGY
FWORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
5Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product
B22F 9/08 2006.1
BPERFORMING OPERATIONS; TRANSPORTING
22CASTING; POWDER METALLURGY
FWORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
9Making metallic powder or suspensions thereof; Apparatus or devices specially adapted therefor
02using physical processes
06starting from liquid material
08by casting, e.g. through sieves or in water, by atomising or spraying
C21D 8/02 2006.1
CCHEMISTRY; METALLURGY
21METALLURGY OF IRON
DMODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING, OR OTHER TREATMENTS
8Modifying the physical properties by deformation combined with, or followed by, heat treatment
02during manufacturing of plates or strips
C22C 1/04 2006.1
CCHEMISTRY; METALLURGY
22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
CALLOYS
1Making non-ferrous alloys
04by powder metallurgy
C22C 33/02 2006.1
CCHEMISTRY; METALLURGY
22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
CALLOYS
33Making ferrous alloys
02by powder metallurgy
CPC
B22F 2003/248
BPERFORMING OPERATIONS; TRANSPORTING
22CASTING; POWDER METALLURGY
FWORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER
3Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; ; Presses and furnaces
24After-treatment of workpieces or articles
248Thermal after-treatment
B22F 2009/0824
BPERFORMING OPERATIONS; TRANSPORTING
22CASTING; POWDER METALLURGY
FWORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER
9Making metallic powder or suspensions thereof
02using physical processes
06starting from liquid material
08by casting, e.g. through sieves or in water, by atomising or spraying
082atomising using a fluid
0824with a specific atomising fluid
B22F 2009/088
BPERFORMING OPERATIONS; TRANSPORTING
22CASTING; POWDER METALLURGY
FWORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER
9Making metallic powder or suspensions thereof
02using physical processes
06starting from liquid material
08by casting, e.g. through sieves or in water, by atomising or spraying
082atomising using a fluid
088Fluid nozzles, e.g. angle, distance
B22F 2998/10
BPERFORMING OPERATIONS; TRANSPORTING
22CASTING; POWDER METALLURGY
FWORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER
2998Supplementary information concerning processes or compositions relating to powder metallurgy
10Processes characterised by the sequence of their steps
B22F 3/18
BPERFORMING OPERATIONS; TRANSPORTING
22CASTING; POWDER METALLURGY
FWORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER
3Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; ; Presses and furnaces
18by using pressure rollers
B22F 5/006
BPERFORMING OPERATIONS; TRANSPORTING
22CASTING; POWDER METALLURGY
FWORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER
5Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product
006of flat products, e.g. sheets
Applicants
  • PHILIP MORRIS PRODUCTS, INC. [US]/[US]
Inventors
  • HAJALIGOL, Mohammad, R.
  • SCOREY, Clive
  • SIKKA, Vinod, K.
  • DEEVI, Seetharama, C.
  • FLEISCHHAUER, Grier
  • LILLY, A., Clifton, Jr.
  • GERMAN, Randall, M.
Agents
  • SKIFF, Peter, K.
Priority Data
08/985,24604.12.1997US
Publication Language English (en)
Filing Language English (EN)
Designated States
Title
(EN) METHOD OF MANUFACTURING ALUMINIDE SHEET BY THERMOMECHANICAL PROCESSING OF ALUMINIDE POWDERS
(FR) PROCEDE DE FABRICATION DE FEUILLE D'ALUMINURE PAR TRAITEMENT THERMOMECANIQUE DE POUDRES D'ALUMINURE
Abstract
(EN) A powder metallurgical process of preparing a sheet from a powder having an intermetallic alloy composition such as an iron, nickel or titanium aluminide. The sheet can be manufactured into electrical resistance heating elements having improved room temperature ductility, electrical resistivity, cyclic fatigue resistance, high temperature oxidation resistance, low and high temperature strength, and/or resistance to high temperature sagging. The iron aluminide has an entirely ferritic microstructure which is free of austenite and can include, in weight %, 4 to 32% Al, and optional additions such as $m(F)1% Cr, $m(G)0.05% Zr, $m(F)2% Ti, $m(F)2% Mo, $m(F)1% Ni, $m(F)0.75% C, $m(F)0.1% B, $m(F)1% submicron oxide particles and/or electrically insulating or electrically conductive covalent ceramic particles, $m(F)1% rare earth metal, and/or $m(F)3% Cu. The process includes forming a non-densified metal sheet by consolidating a powder having an intermetallic alloy composition such as by roll compaction, tape casting or plasma spraying, forming a cold rolled sheet by cold rolling the non-densified metal sheet so as to increase the density and reduce the thickness thereof and annealing the cold rolled sheet. The powder can be a water, polymer or gas atomized powder which is subjecting to sieving and/or blending with a binder prior to the consolidation step. After the consolidation step, the sheet can be partially sintered. The cold rolling and/or annealing steps can be repeated to achieve the desired sheet thickness and properties. The annealing can be carried out in vacuum furnace with a vacuum or inert atmosphere. During final annealing, the cold rolled sheet recrystallizes to an average grain size of about 10 to 30 $i($g(m)m). Final stress relief annealing can be carried out in the B2 phase temperature range.
(FR) L'invention concerne un procédé de métallurgie des poudres pour préparer une feuille à partir d'une poudre constituée d'une composition en alliage intermétallique telle qu'un aluminure de fer, de nickel ou de titane. On peut transformer la feuille pour obtenir des éléments électriques chauffants à résistance possédant de meilleures ductilité à température, résistivité électrique, résistance à la fatigue cyclique, résistance à l'oxydation à températures élevées, rigidité à températures basses ou élevées et/ou résistance au fléchissement à températures élevées. L'aluminure de fer possède une microstructure entièrement ferritique qui est exempte d'austénite et peut comprendre de 4 à 32 % en poids d'Al ainsi que d'éventuels additifs tels que Cr$m(F)1%, Zr$m(G)0,05 %, Ti$m(F)2%, Mo$m(F)2%, Ni$m(F)1%, C$m(F)0,75%, B$m(F)0,1%, des particules submicroniques d'oxydes et/ou des particules électro-isolantes ou électro-conductrices $m(F)1%, un métal des terres rares $m(F)1% et/ou Cu$m(F)3%. Le procédé consiste en ce qui suit: former une feuille de métal non densifiée par la consolidation d'une poudre constituée d'une composition en alliage intermétallique, par exemple en utilisant le compactage par cylindres, le coulage en bande ou la projection par plasma; former une feuille laminée à froid par laminage à froid de la feuille de métal non densifiée de manière à augmenter la densité de la feuille et à en réduire l'épaisseur et; recuire la feuille laminée à froid. La poudre peut se présenter comme une poudre atomisée avec de l'eau, un polymère ou du gaz et soumise au tamisage et/ou au malaxage avec un liant avant la consolidation. Après la consolidation, la feuille peut être partiellement frittée. On peut répéter le laminage à froid et/ou le recuit pour obtenir les propriétés et l'épaisseur désirées de la feuille. Le recuit peut être effectué dans un four à vide, dans une atmosphère inerte ou sous vide. Lors du recuit final, la feuille laminée à froid est recristallisée pour obtenir une granularité moyenne entre 10 et 30 $g(m)m. On peut effectuer un recuit final de détente dans une plage de températures de la phase B2.
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