Title:
PRODUCTION OF FERRITIC STAINLESS STEEL EXCELLENT IN SURFACE CHARACTERISTIC
Document Type and Number:
Japanese Patent JP3806186
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To prepare a ferritic stainless steel sheet minimal in minute waviness (roping) occurring at the time of cold rolling and excellent in surface characteristic.
SOLUTION: A ferritic stainless steel, having a composition which consists of, by weight, 0.025-0.055% C, 0.001-0.015% N, 15.0-18.0% Cr, 0.005-0.10% Ti, 0.01-1.0% Mn, 0.01-1.0% Si, 0.015-0.025% Al, ≤0.010% S, ≤0.04% P, ≤0.5% Ni, ≤0.5% Cu, ≤0.2% Mo, ≤0.010% O, and the balance Fe with inevitable impurities and in which γp, represented by γp=420×C+470×N+23×Ni+12×Cu+7×Mn-11.5×Cr-11.5×Si-11×Mo-52×Al-49×Ti+189, is regulated to 20-35%, is used. This steel is hot-rolled at 1150-1300°C, and cumulative draft at ≥1100°C at the time of roughing is regulated to ≥40%, and successively finish rolling is performed. The resultant steel plate is coiled at 450-600°C coiling temp. and subjected, without hot rolled plate annealing, to pickling, to cold rolling, and then to final annealing.
Inventors:
Masayuki Abe
Kimura Ken
Takehide Senuma
Kimura Ken
Takehide Senuma
Application Number:
JP19375996A
Publication Date:
August 09, 2006
Filing Date:
July 23, 1996
Export Citation:
Assignee:
Nippon Steel Corporation
International Classes:
B21B3/02; C21D9/46; C21D8/00; C22C38/00; C22C38/50; C22C38/54; (IPC1-7): C21D8/00; B21B3/02; C22C38/00; C22C38/50; C22C38/54
Domestic Patent References:
| JP8049017A | ||||
| JP1201445A | ||||
| JP62199721A |
Attorney, Agent or Firm:
Hiroaki Tamura
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