Free-cutting copper alloy and method for producing free-cutting copper alloy

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United States of America Patent

PATENT NO 11814712
APP PUB NO 20220259711A1
SERIAL NO

17611195

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Abstract

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This free-cutting copper alloy contains Cu: more than 57.5% but less than 64.5%, Si: more than 0.20% but less than 1.20%, Pb: more than 0.001% but less than 0.20%, Bi: more than 0.10% but less than 1.00%, and P: more than 0.001% but less than 0.20%, with the balance being Zn and unavoidable impurities, wherein the total amount of Fe, Mn, Co and Cr is less than 0.45%, the total amount of Sn and Al is less than 0.45%, relationships of 56.3≤f1=[Cu]−4.8×[Si]+0.5×[Pb]+0.5×[Bi]−0.5×[P]≤59.5 and 0.12≤f2=[Pb]+[Bi]<1.0 are satisfied.

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Patent Owner(s)

Patent OwnerAddress
MITSUBISHI MATERIALS CORPORATIONCHIYODA-KU TOKYO 100-8117

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Goto, Hiroki Sakai, JP 110 774
Oishi, Keiichiro Sakai, JP 78 383
Suzaki, Kouichi Sakai, JP 18 24

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