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1. (WO1997019200) IMPROVED METHOD FOR OPTIMIZATION OF THE GRAIN REFINEMENT OF ALUMINIUM ALLOYS
Latest bibliographic data on file with the International Bureau

Pub. No.: WO/1997/019200 International Application No.: PCT/SE1996/001517
Publication Date: 29.05.1997 International Filing Date: 21.11.1996
Chapter 2 Demand Filed: 12.06.1997
IPC:
C22C 1/02 (2006.01) ,C22C 1/03 (2006.01)
C CHEMISTRY; METALLURGY
22
METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
C
ALLOYS
1
Making non-ferrous alloys
02
by melting
C CHEMISTRY; METALLURGY
22
METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
C
ALLOYS
1
Making non-ferrous alloys
02
by melting
03
using master alloys
Applicants:
OPTICAST AB [SE/SE]; Österlånggatan 39 S-111 31 Stockholm, SE (AllExceptUS)
BÄCKERUD, Stig, Lennart [SE/SE]; SE (UsOnly)
JOHNSSON, Mats [SE/SE]; SE (UsOnly)
SIGWORTH, Geoffrey [US/US]; US (UsOnly)
Inventors:
BÄCKERUD, Stig, Lennart; SE
JOHNSSON, Mats; SE
SIGWORTH, Geoffrey; US
Agent:
BERG, S., A. ; H. Albihns Patentbyrå AB P.O. Box 3137 S-103 62 Stockholm, SE
Priority Data:
9504146-321.11.1995SE
9602355-114.06.1996SE
Title (EN) IMPROVED METHOD FOR OPTIMIZATION OF THE GRAIN REFINEMENT OF ALUMINIUM ALLOYS
(FR) PROCEDE AMELIORE D'OPTIMISATION DU RECUIT D'AFFINAGE STRUCTURAL D'ALLIAGES D'ALUMINIUM
Abstract:
(EN) The invention is a method of controlling the grain refinement of certain aluminium alloys. The grain sizes for different values of the grain growth index, GGI, are determined for the used casting method. The GGI is represented by the sum of m(k - 1) value multiplied with the concentration for every element in the aluminium alloy. If the value for a certain alloy is compared with known relations between the m(k - 1) value and the grain size the composition of the alloy melt is amended to an optimum grain size by adding a grain size affecting agent. The method can be further improved by optimising the amount of nucleating agent.
(FR) L'invention concerne un procédé de régularisation du recuit d'affinage structural de certains alliages d'aluminium. On détermine, pour le procédé de coulage utilisé, les dimensions du grain en fonction des différentes valeurs de l'indice de croissance du grain. Cet indice est représenté par la somme de la valeur m(k-1) multipliée par la concentration de chaque élément dans l'alliage d'aluminium. Si on compare la valeur d'un certain alliage avec des rapports connus entre la valeur m(k-1) et la dimension du grain, on amende la composition de l'alliage en fusion en lui ajoutant un agent modifiant la dimension du grain, afin d'obtenir une dimension optimale. On peut encore améliorer ce procédé en optimisant la quantité d'agent de nucléation.
Designated States: AL, AM, AT, AU, AZ, BA, BB, BG, BR, BY, CA, CH, CN, CU, CZ, DE, DK, EE, ES, FI, GB, GE, HU, IL, IS, JP, KE, KG, KP, KR, KZ, LC, LK, LR, LS, LT, LU, LV, MD, MG, MK, MN, MW, MX, NO, NZ, PL, PT, RO, RU, SD, SE, SG, SI, SK, TJ, TM, TR, TT, UA, UG, US, UZ, VN
African Regional Intellectual Property Organization (ARIPO) (KE, LS, MW, SD, SZ, UG)
Eurasian Patent Organization (AM, AZ, BY, KG, KZ, MD, RU, TJ, TM)
European Patent Office (AT, BE, CH, DE, DK, ES, FI, FR, GB, GR, IE, IT, LU, MC, NL, PT, SE)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, ML, MR, NE, SN, TD, TG)
Publication Language: English (EN)
Filing Language: English (EN)
Also published as:
NO19982314EP0866882US6073677JP2000511233 CA2236144AU1996076613