Master alloy for casting a modified copper alloy and casting...

Details Master alloy for casting a modified copper alloy and casting... Master alloy for casting a modified copper alloy and casting...

C - Chemistry, Metallurgy

22

C

C22C 9/00 (2006.01) B22D 1/00 (2006.01) B22D 21/00 (2006.01) B22D 27/20 (2006.01) C22C 1/02 (2006.01) C22C 9/04 (2006.01) C22C 18/00 (2006.01) C22C 18/02 (2006.01)

Patent

CA 2561295

There are provided a master alloy for use in casting a modified copper alloy, which allows the formation of fine crystal grains at the time of solidification of the melt of the copper alloy, and a casting method which comprises using the master alloy. A cast copper alloy article having fine crystal grains is produced by using a master alloy for use in casting a copper alloy which has a chemical composition that Cu: 40 to 80 %, Zr: 0.5 to 35 %, and the balance: Zn, or a master alloy for use in casting a copper alloy which has a chemical composition that Cu: 40 to 80 %, Zr: 0.5 to 35 %, P: 0.01 to 3 % and the balance: Zn.

Cette invention a pour objet un alliage mère utilisé pour mouler un alliage de cuivre modifié, permettant la formation de grains cristallins fins lors de la solidification de la fusion de l'alliage de cuivre, et un procédé de moulage comprenant l'utilisation de cet alliage mère. Un article moulé dans un alliage de cuivre à grains cristallins fins est produit à l'aide d'un alliage mère à utiliser lors du moulage d'un alliage de cuivre, dont la composition chimique est la suivante : cuivre : 40 à 80 %, zirconium : 0.5 à 35 %, et restant du zinc, ou à l'aide d'un alliage mère à utiliser lors du moulage d'un alliage de cuivre dont la composition chimique est la suivante : cuivre: 40 à 80 %, zirconium : 0.5 à 35 %, P: 0.01 à 3 % et restant du zinc.

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