Title:
METHOD FOR MANUFACTURING STEEL SHEET FOR BOTTLE CAP, AND STEEL SHEET FOR BOTTLE CAP
Document Type and Number:
WIPO Patent Application WO/2016/104773
Kind Code:
A1
Abstract:
This method for manufacturing a steel sheet for a bottle cap has a heating step for heating a slab containing a predetermined chemical composition, a hot rolling step for obtaining a hot-rolled steel sheet by hot rolling and winding the slab after the heating step, a pickling step for pickling the hot-rolled steel sheet after the hot rolling step, a cold rolling step for obtaining a cold-rolled steel sheet by cold rolling the hot-rolled steel sheet after the pickling step, an annealing step for annealing the cold-rolled steel sheet after the cold rolling step at an annealing temperature T (°C), and a secondary cold rolling step for performing secondary cold rolling of the cold-rolled steel sheet after the annealing step using a two-stand cold rolling mill in which the inter-stand tension t (MPa) and the annealing temperature T are set so as to satisfy the expression 350 ≤ 0.067 × ln(t) × T × (-0.23 × ln(C) + 0.25). In the above expression, C is the C content in wt%.
Inventors:
MIKASA AKIRA (JP)
NONAKA TOSHIKI (JP)
TAKEUCHI SATOSHI (JP)
NONAKA TOSHIKI (JP)
TAKEUCHI SATOSHI (JP)
Application Number:
PCT/JP2015/086374
Publication Date:
June 30, 2016
Filing Date:
December 25, 2015
Export Citation:
Assignee:
NIPPON STEEL & SUMITOMO METAL CORP (JP)
International Classes:
C21D9/46; B21B1/22; C22C38/00; C22C38/14
Domestic Patent References:
| WO2013052194A1 | 2013-04-11 |
Foreign References:
| JPH05247669A | 1993-09-24 | |||
| JP2009052108A | 2009-03-12 | |||
| JP2011214068A | 2011-10-27 |
Attorney, Agent or Firm:
SHIGA Masatake et al. (JP)
Masatake Shiga (JP)
Masatake Shiga (JP)
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