Copper alloy sheet material and current-carrying component
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United States of America Patent
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Nov 24, 2020
Grant Date -
Jul 14, 2016
app pub date -
Aug 26, 2014
filing date -
Aug 30, 2013
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Abstract
A copper alloy sheet material contains, in mass %, Fe: 0.05 to 2.50%, Mg: 0.03 to 1.00%, and P: 0.01 to 0.20%, and the contents of these elements satisfy the relation Mg-1.18(P—Fe/3.6)3 0.03. The Mg solid-solution ratio determined by the amount of dissolved Mg (mass %)/the Mg content of the alloy (mass %) ’ 100 is 50% or more. The density of an Fe—P-based compound having a particle size of 50 nm or more is 10.00 particles/10 mm2 or less, and the density of an Mg—P-based compound having a particle size of 100 nm or more is 10.00 particles/10 mm2 or less. The Cu—Fe—P—Mg-based copper alloy sheet material is excellent in terms of electrical conductivity, strength, bending workability, and stress relaxation resistance in the case where load stress is applied in a direction perpendicular to both a rolling direction and a sheet thickness direction.
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