| 摘要 |
<p>A nickel alloy electroplated cold-rolled steel sheet excellent in press-formability and phosphating-treatability, which comprises: a cold-rolled steel sheet consisting of: carbon (C) : up to 0.06 wt.% silicon (Si) : up to 0.5 wt.%, manganese (Mn) : up to 2.5 wt.%, phosphorus (P) : up to 0.1 wt.%, sulfur (S) : up to 0.025 wt.%, soluble aluminum (Sol.Al) : up to 0.10 wt.%, nitrogen (N) : up to 0.005 wt.%, and the balance being iron (Fe) and incidental impurities; a nickel alloy electroplating layer, formed on at least one surface of the cold-rolled steel sheet, in which layer nickel alloy particles are precipitated at a distribution density of at least 1 x 10<1><2>/m<2>, the nickel alloy particles containing at least one of phosphorus (P), boron (B) and sulfur (S) in an amount within a range of from 1 to 15 wt.%, the plating weight of the nickel alloy electroplating layer being within a range of from 5 to 60 mg/m<2> of the cold-rolled steel sheet; and a nickel alloy oxide film, formed on the surface of the nickel alloy electroplating layer, having an average thickness within a range of from 0.0002 to 0.005 mu m. The above-mentioned cold-rolled steel sheet may additionally contain at least one of up to 0.15 wt.% titanium (Ti) and up to 0.15 wt.% niobium (Nb). In the case where titanium and/or niobium are added, up to 0.003 wt.% boron (B) may also be additionally added.</p> |
