Method of Manufacturing Thin Martensitic Stainless Steel Sheet Using Strip Caster with Twin Rolls and Thin Martensitic Stainless Steel Sheet Manufactured by the Same
AssigneePosco
InventorsSeong-In Jeong, Jin-Ho Kim, Ji-Woo Im
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Abstract
Provided is a method of manufacturing a THIN MARTENSITIC STAINLESS STEEL SHEET by casting a thin cast strip using a strip caster including a pair of rotating strip casting rolls and hot rolling the thin cast strip, wherein any one of conditions (a) and (b) is satisfied during the hot rolling, and a THIN MARTENSITIC STAINLESS STEEL SHEET manufactured by the same: (a) Bending force of rolling rolls: 30 to 500 kN (b) Size of crowns of rolling rolls: 50 to 250 μm.
Claims6
A method of manufacturing a THIN MARTENSITIC STAINLESS STEEL SHEET by casting a thin cast strip using a strip caster comprising a pair of rotating strip casting rolls and hot rolling the thin cast strip, wherein any one of conditions (a) and (b) is satisfied during the hot rolling:
- (a) Bending force of rolling rolls:
- 30 to 500 kN
- (b) Size of crowns of rolling rolls:
- 50 to 250%.
A THIN MARTENSITIC STAINLESS STEEL SHEET, comprising 0.3 wt % to 0.8 wt % of C, 12.0 wt % to 16.0 wt % of Cr, 0.2 wt % to 1.0 wt % of Si, 0.2 wt % to 1.0 wt % of Mn, 0.2 wt % to 1.0 wt % of Ni, 0.01 wt % to 0.1 wt % of N, 0.03 wt % or less of P, and 0.03 wt % or less of S, and also includes Fe and other inevitable impurities, wherein a size of an edge crack is no more than 30 mm.
Dependencies are inferred from the claim text.