C - Chemistry – Metallurgy – 22 – C
Patent
C - Chemistry, Metallurgy
22
C
C22C 9/04 (2006.01) C22F 1/08 (2006.01)
Patent
CA 2303512
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 69 to 79 percent, by weight, of copper, 2.0 to 4.0 percent, by weight, of silicon, 0.02 to 0.4, by weight, of lead, and the remaining percent, by weight, of zinc.
L'invention se rapporte à un alliage de décolletage à base de cuivre qui peut conserver sa capacité à subir un décolletage satisfaisant d'un point de vue industriel alors que sa teneur en plomb est considérablement réduite par rapport à celle d'un alliage classique de décolletage à base de cuivre. Cet alliage possède la composition suivante: 69 à 79 % en poids de cuivre, 2,0 à 4,0 % en poids de silicium, 0,02 à 0,4 % en poids de plomb, le reste de la composition étant constitué de zinc.
Mitsubishi Shindoh Co. Ltd.
Riches Mckenzie & Herbert Llp
Sambo Copper Alloy Co. Ltd.
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