| 摘要 |
PURPOSE:To manufacture the Cr-series stainless steel thin sheet having excellent tensile characteristics, ridging characteristics and deep drawing characteristics by subjecting the molten metal of a Cr-series stainless steel to continuous casting into the shape of a thin sheet by a double rolling method or the like, thereafter subjecting the thin sheet to hot rolling under specific conditions, coiling the sheet into a coil and thereafter subjecting it to cold rolling and annealing. CONSTITUTION:The molten metal of a Cr-series stainless steel contg., by weight, 8 to 30% Cr, 0.001 to 0.5% C, <5.0% Si, <5.0 Mn, 0.001 to 0.5% Al and 0.001 to 0.5% N is subjected to continuous casting into the shape of a thin sheet having <10mm thickness by a double rolling apparatus made of copper. Then, the steel sheet is heated to a gamma phase precipitation starting temp. or above, is hot-rolled at >=20% draft, is thereafter held to the temp. for 3sec to 5min and is coiled into a coil at <700 deg.C, or after reeled, is annealed at 700 to 1000 deg.C or is reeled at 700 to 1000 deg.C. Finally, the steel sheet is cold-rolled and annealed, by which the thin sheet of the Cr-series stainless steel having excellent characteristics can be manufactured. |
