Title:
HIGHLY CORROSION-RESISTANT COLD-ROLLED FERRITE STAINLESS STEEL SHEET HAVING EXCELLENT TOUGHNESS, AND PROCESS FOR PRODUCTION THEREOF
Document Type and Number:
WIPO Patent Application WO/2011/096454
Kind Code:
A1
Abstract:
Disclosed are: a highly corrosion-resistant cold-rolled ferrite stainless steel sheet having excellent toughness, which is characterized by having a Charpy impact value of 100 J/cm2 or more at -50°C when the ferrite stainless steel sheet has a thickness of 4 mm; and a process for producing the ferrite stainless steel sheet. Specifically disclosed is a highly corrosion-resistant cold-rolled ferrite stainless steel sheet having excellent toughness, which is characterized by comprising (in mass%) 0.020% or less of C, 1.0% or less of Si, 1.0% or less of Mn, 0.06% or less of P, 0.01% or less of S, 18.0-24.0% of Cr, 0.3% or less of Mo, 0.015% or less of Ti, 0.20-0.40% of Al, 0.020% or less of N, Nb in such an amount that the following formula: 10 × (C+N) ≤ Nb ≤ 0.40% is fulfilled, and Fe and unavoidable impurities which make up the remainder, wherein the contents of the components meet the formula (A).
Ti × N ≤ 8.00 × 10-5 (A).
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Inventors:
SAMUKAWA, Takashi (JFE STEEL CORPORATION 2-3, Uchisaiwai-cho 2-chome, Chiyoda-k, Tokyo 11, 〒1000011, JP)
寒川孝 (〒11 東京都千代田区内幸町二丁目２番３号JFEスチール株式会社知的財産部内 Tokyo, 〒1000011, JP)
IDE, Shinsuke (JFE STEEL CORPORATION 2-3, Uchisaiwai-cho 2-chome, Chiyoda-k, Tokyo 11, 〒1000011, JP)
井手信介 (〒11 東京都千代田区内幸町二丁目２番３号JFEスチール株式会社知的財産部内 Tokyo, 〒1000011, JP)
寒川孝 (〒11 東京都千代田区内幸町二丁目２番３号JFEスチール株式会社知的財産部内 Tokyo, 〒1000011, JP)
IDE, Shinsuke (JFE STEEL CORPORATION 2-3, Uchisaiwai-cho 2-chome, Chiyoda-k, Tokyo 11, 〒1000011, JP)
井手信介 (〒11 東京都千代田区内幸町二丁目２番３号JFEスチール株式会社知的財産部内 Tokyo, 〒1000011, JP)
Application Number:
JP2011/052186
Publication Date:
August 11, 2011
Filing Date:
January 27, 2011
Export Citation:
Assignee:
JFE STEEL CORPORATION (2-3 Uchisaiwai-cho 2-chome, Chiyoda-ku Tokyo, 11, 〒1000011, JP)
JFEスチール株式会社 (〒11 東京都千代田区内幸町二丁目２番３号 Tokyo, 〒1000011, JP)
SAMUKAWA, Takashi (JFE STEEL CORPORATION 2-3, Uchisaiwai-cho 2-chome, Chiyoda-k, Tokyo 11, 〒1000011, JP)
寒川孝 (〒11 東京都千代田区内幸町二丁目２番３号JFEスチール株式会社知的財産部内 Tokyo, 〒1000011, JP)
IDE, Shinsuke (JFE STEEL CORPORATION 2-3, Uchisaiwai-cho 2-chome, Chiyoda-k, Tokyo 11, 〒1000011, JP)
JFEスチール株式会社 (〒11 東京都千代田区内幸町二丁目２番３号 Tokyo, 〒1000011, JP)
SAMUKAWA, Takashi (JFE STEEL CORPORATION 2-3, Uchisaiwai-cho 2-chome, Chiyoda-k, Tokyo 11, 〒1000011, JP)
寒川孝 (〒11 東京都千代田区内幸町二丁目２番３号JFEスチール株式会社知的財産部内 Tokyo, 〒1000011, JP)
IDE, Shinsuke (JFE STEEL CORPORATION 2-3, Uchisaiwai-cho 2-chome, Chiyoda-k, Tokyo 11, 〒1000011, JP)
International Classes:
C22C38/28; B21B3/02; C21D8/02; C21D9/46; C22C38/54
Attorney, Agent or Firm:
OCHIAI, Kenichiro (JFE TECHNO-RESEARCH CORPORATION 7th floor, Yanagiya building, 1-10, Nihonbashi 2-chome, Chuo-k, Tokyo 27, 〒1030027, JP)
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