Free-cutting copper alloy containing very low lead

Details Free-cutting copper alloy containing very low lead Free-cutting copper alloy containing very low lead

C - Chemistry, Metallurgy

22

C

C22C 9/04 (2006.01)

Patent

CA 2619357

The free-cutting copper alloy according to the present invention contains a greatly reduced amount of lead in comparison with conventional free-cutting copper alloys, but provides industrially satisfactory machinability. The free- cutting alloys comprise 71.5 to 78.5 percent, by weight, of copper, 2.0 to 4.5 percent, by weight, of silicon, 0.005 percent up to but less than 0.02, by weight, of lead, and the remaining percent, by weight, of zinc.

L~invention concerne un alliage de cuivre de décolletage ayant une teneur très réduite en plomb par rapport aux alliages de cuivre de décolletage classiques, mais présentant une usinabilité industrielle satisfaisante. Cet alliage de décolletage comprend de 71,5 à 78,5 pourcents, en poids, de cuivre, de 2,0 à 4,5 pourcents, en poids, de silicone, de 0,005 à 0,02 pourcents, mais moins de 0,02 pourcents, en poids, de plomb, le pourcentage restant, en poids, étant constitué de zinc.

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