C - Chemistry – Metallurgy – 22 – C
Patent
C - Chemistry, Metallurgy
22
C
C22C 9/06 (2006.01) C22C 9/02 (2006.01) C22F 1/08 (2006.01)
Patent
CA 2561903
The invention relates to alloys based on copper, nickel, tin and lead, which are obtained by means of continuous or semi-continuous casting, static casting into billets, or spray casting into billets and which can undergo spinodal hardening. The machinability index of the inventive alloys is greater than 80 %, in relation to standard ASTM C36000 brass, and can go up to 90 %. According to the invention, the alloy contains between 1 wt.- % and 20 wt.- % Ni, between 1 wt.- % and 20 wt.- % Sn and between 0.1 wt.- % and 4 wt.- % Pb, the remainder comprising essentially Cu and, optionally, up to 10 % of one or more of the following elements, namely Fe, Zn, Mn, and/or up to 5 % of one or more of the following elements, namely Zr, Nb, Cr, Al, Mg.
Alliages à base de cuivre, nickel, étain et plomb obtenus par un procédé de coulée continue ou semi-continue, ou de coulée statique en billettes ou de coulée par sprayforming en billettes et susceptible de durcissement spinodale. L'index d'usinabilité des alliages de l'invention dépasse 80% par rapport au laiton normé ASTM C36000, et peut aller jusqu'à 90 %. L'alliage comprend en poucentage pondéral entre 1 % et 20 % en poids de Ni, entre 1 % et 20 % en poids de Sn, entre 0.1 % de Pb, le solde étant constitué essentiellement de Cu, et optionnellement jusqu'à 10 % d'un ou plus des éléments suivants : Fe, Zn, Mn et/ou jusqu'à 5 % d'un ou plus des élements suivants : Zr, Nb, Cr, Al, Mg.
Goudreau Gage Dubuc
Swissmetal-Ums Usines Metallurgiques Suisses Sa
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