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1. WO2000043559 - HYPEREUTECTIC ALUMINIUM-SILICON ALLOY PRODUCT FOR SEMISOLID FORMING

Publication Number WO/2000/043559
Publication Date 27.07.2000
International Application No. PCT/FR2000/000095
International Filing Date 18.01.2000
Chapter 2 Demand Filed 19.06.2000
IPC
C22C 1/00 2006.01
CCHEMISTRY; METALLURGY
22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
CALLOYS
1Making non-ferrous alloys
C22C 21/02 2006.01
CCHEMISTRY; METALLURGY
22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
CALLOYS
21Alloys based on aluminium
02with silicon as the next major constituent
C22C 21/04 2006.01
CCHEMISTRY; METALLURGY
22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
CALLOYS
21Alloys based on aluminium
02with silicon as the next major constituent
04Modified aluminium-silicon alloys
CPC
C22C 1/005
CCHEMISTRY; METALLURGY
22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
CALLOYS
1Making alloys
005Making alloys with holding in the range of the solid-liquid phase
C22C 21/02
CCHEMISTRY; METALLURGY
22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
CALLOYS
21Alloys based on aluminium
02with silicon as the next major constituent
C22C 21/04
CCHEMISTRY; METALLURGY
22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
CALLOYS
21Alloys based on aluminium
02with silicon as the next major constituent
04Modified aluminium-silicon alloys
Applicants
  • ALUMINIUM PECHINEY [FR/FR]; 7, place du Chancelier Adenauer F-75218 Paris Cedex 16, FR
Inventors
  • LASLAZ, Gérard; FR
  • COSSE, François; FR
  • GARAT, Michel; FR
Agents
  • MOUGEOT, Jean-Claude; Pechiney Immeuble "SIS" 217, cours Lafayette F-69451 Lyon Cedex 06, FR
Priority Data
99/0078721.01.1999FR
Publication Language French (FR)
Filing Language French (FR)
Designated States
Title
(EN) HYPEREUTECTIC ALUMINIUM-SILICON ALLOY PRODUCT FOR SEMISOLID FORMING
(FR) PRODUIT EN ALLIAGE ALUMINIUM-SILICIUM HYPEREUTECTIQUE POUR MISE EN FORME A L'ETAT SEMI-SOLIDE
Abstract
(EN)
The invention concerns a eutectic or hypereutectic aluminium-silicon alloy product for thixotropic forming, comprising (by weight) 10 to 30 % silicon and optionally copper ($m(f) 10%), magnesium ($m(f) 3%), manganese ($m(f) 2%), iron ($m(f) 2%), nickel ($m(f) 4%), cobalt ($m(f) 3%) and other elements ($m(f) 0.5%) each and 1 % in total, whereof the microstructure consists of primary silicon crystals, equiaxed aluminium dendrites with size less than 4 mm, and eutectics consisting of eutectic silicon grains and eutectic aluminium grains with size less than 4 mm. The invention also concerns a method for obtaining said microstructure which consists in adding to the alloy 50 to 2000 ppm (by weight) of boron, the added amount being in excess relatively to what is required for precipitating impurities.
(FR)
L'invention a pour objet un produit en alliage aluminium-silicium eutectique ou hypereutectique apte au thixoformage, comportant (en poids) de 10 à 30 % de silicium et éventuellement du cuivre ($m(f) 10 %), du magnésium ($m(f) 3 %), du manganèse ($m(f) 2 %), du fer ($m(f) 2 %), du nickel ($m(f) 4 %), du cobalt ($m(f) 3 %) et d'autres éléments ($m(f) 0,5 %) chacun et 1 % au total), dont la microstructure est constituée de cristaux de silicium primaire, de dendrites d'aluminium de type équiaxe et de taille inférieure à 4 mn, et d'un eutectique constitué de grains de silicium eutectique et de grains d'aluminium eutectique de taille inférieure à 4 mn. Elle a également pour objet un procédé pour obtenir cette microstructure constituant à ajouter à l'alliage de 50 à 2000 ppm (en poids) de bore, la quantité ajoutée étant en excès par rapport à celle strictement nécessaire à la précipitation des impuretés.
Also published as
CZPV2001-2658
NO20013576
SK10002001
SK200101000
Latest bibliographic data on file with the International Bureau