Ni-plated steel sheet for battery can having excellent press formability
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United States of America Patent
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Aug 5, 2014
Grant Date -
Aug 30, 2012
app pub date -
Aug 24, 2010
filing date -
Aug 26, 2009
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Abstract
Provided is a Ni-plated steel sheet having excellent press formability. An Fe—Ni diffusion layer and a softened Ni layer formed on the Fe—Ni diffusion layer are formed on a surface of a steel sheet corresponding to an outer surface of a battery can, a semi-bright Ni plating layer is formed on the softened Ni layer, a Ni coating weight of the Fe—Ni diffusion layer and the softened Ni layer formed on the Fe—Ni diffusion layer is set smaller than a Ni coating weight of the semi-bright Ni plating layer, and average roughness Ra of the semi-bright Ni plating layer measured by a traceable roughness gauge is 1.0 μm or more and 2.0 μm or less, and a maximum height Ry of the semi-bright Ni plating layer measured by the traceable roughness gauge is 5 μm or more and 20 μm or less.
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