Title:
FERRITIC STAINLESS STEEL SHEET SUPERIOR IN SURFACE GLOSSINESS AND CORROSION RESISTANCE AND METHOD FOR PRODUCING SAME
Document Type and Number:
WIPO Patent Application WO/2011/122513
Kind Code:
A1
Abstract:
Disclosed is a ferritic stainless steel sheet formed from 0.001 - 0.03% C, 0.01 - 1.0% Si, 0.01 - 1.5% Mn, 0.005 - 0.05% P, 0.0001 - 0.01% S, 12 - 16% Cr, 0.001 -0.03% N, 0.05 -0.3% Nb, 0.03 - 0.15% Ti, 0.005 - 0.5% Al, and 0.01 - 1.0% Sn, with the remainder being Fe and unavoidable impurities, and the stainless steel sheet satisfying the relation 1 ≤ Nb/Ti ≤ 3.5. Also disclosed is a method for producing this stainless steel sheet wherein a stainless steel slab having these steel components is heated, the extrusion temperature set to 1080 - 1190°C and the winding temperature after completion of hot-rolling set to 500 - 700°C. After hot-rolling, the hot-rolled sheet is annealed or the annealing step omitted and cold-rolled once or cold rolled twice or more with intermediate annealing in between. Final annealing is carried out at 850 - 980°C.
Inventors:
HATANO, Masaharu (6-1 Otemachi 2-chome, Chiyoda-k, Tokyo 04, 〒1000004, JP)
秦野 正治 (〒04 東京都千代田区大手町二丁目６番１号新日鐵住金ステンレス株式会社内 Tokyo, 〒1000004, JP)
YAMAGISHI, Akihito (6-1 Otemachi 2-chome, Chiyoda-k, Tokyo 04, 〒1000004, JP)
山岸 昭仁 (〒04 東京都千代田区大手町二丁目６番１号新日鐵住金ステンレス株式会社内 Tokyo, 〒1000004, JP)
秦野 正治 (〒04 東京都千代田区大手町二丁目６番１号新日鐵住金ステンレス株式会社内 Tokyo, 〒1000004, JP)
YAMAGISHI, Akihito (6-1 Otemachi 2-chome, Chiyoda-k, Tokyo 04, 〒1000004, JP)
山岸 昭仁 (〒04 東京都千代田区大手町二丁目６番１号新日鐵住金ステンレス株式会社内 Tokyo, 〒1000004, JP)
Application Number:
JP2011/057512
Publication Date:
October 06, 2011
Filing Date:
March 22, 2011
Export Citation:
Assignee:
Nippon Steel & Sumikin Stainless Steel Corporation (6-1 Otemachi 2-chome, Chiyoda-ku Tokyo, 04, 〒1000004, JP)
新日鐵住金ステンレス株式会社 (〒04 東京都千代田区大手町二丁目６番１号 Tokyo, 〒1000004, JP)
HATANO, Masaharu (6-1 Otemachi 2-chome, Chiyoda-k, Tokyo 04, 〒1000004, JP)
秦野 正治 (〒04 東京都千代田区大手町二丁目６番１号新日鐵住金ステンレス株式会社内 Tokyo, 〒1000004, JP)
YAMAGISHI, Akihito (6-1 Otemachi 2-chome, Chiyoda-k, Tokyo 04, 〒1000004, JP)
新日鐵住金ステンレス株式会社 (〒04 東京都千代田区大手町二丁目６番１号 Tokyo, 〒1000004, JP)
HATANO, Masaharu (6-1 Otemachi 2-chome, Chiyoda-k, Tokyo 04, 〒1000004, JP)
秦野 正治 (〒04 東京都千代田区大手町二丁目６番１号新日鐵住金ステンレス株式会社内 Tokyo, 〒1000004, JP)
YAMAGISHI, Akihito (6-1 Otemachi 2-chome, Chiyoda-k, Tokyo 04, 〒1000004, JP)
International Classes:
C22C38/00; B21B3/02; C21D8/02; C21D9/46; C22C38/28; C22C38/54
Attorney, Agent or Firm:
AOKI, Atsushi et al. (SEIWA PATENT & LAW, Toranomon 37 Mori Bldg. 5-1, Toranomon 3-chome, Minato-k, Tokyo 23, 〒1058423, JP)
Claims:
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