Cu-Ni-Si based copper alloy sheet material and production method

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United States of America Patent

PATENT NO 11047023
APP PUB NO 20190106769A1
SERIAL NO

16087829

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Abstract

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A copper alloy sheet material that is excellent in surface smoothness of an etched surface has a composition containing, (mass %), from 1.0 to 4.5% of Ni, from 0.1 to 1.2% of Si, from 0 to 0.3% of Mg, from 0 to 0.2% of Cr, from 0 to 2.0% of Co, from 0 to 0.1% of P, from 0 to 0.05% of B, from 0 to 0.2% of Mn, from 0 to 0.5% of Sn, from 0 to 0.5% of Ti, from 0 to 0.2% of Zr, from 0 to 0.2% of Al, from 0 to 0.3% of Fe, from 0 to 1.0% of Zn, the balance Cu and unavoidable impurities. A number density of coarse secondary phase particles has a major diameter of 1.0 μm or more of 4.0×103 per square millimeter or less. KAM value measured with a step size of 0.5 μm is more than 3.00.

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Patent Owner(s)

Patent OwnerAddress
DOWA METALTECH CO LTDTOKYO JAPAN TOKYO METROPOLIS

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Sasaki, Fumiaki Tokyo, JP 5 20
Shutoh, Toshiya Tokyo, JP 3 1
Suda, Hisashi Tokyo, JP 18 87

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