Title:
VERY THIN HARD STEEL SHEET AND METHOD FOR PRODUCING THE SAME
Document Type and Number:
WIPO Patent Application WO/2007/116913
Kind Code:
A1
Abstract:
Disclosed is a very thin hard steel sheet having a thickness of not more than 0.400 mm and containing, in mass %, 0-0.800% (inclusive) of C, 0-0.600% (inclusive) of N, 0-2.0% (inclusive) of Si, 0-2.0% (inclusive) of Mn, 0-0.10% (inclusive) of P, 0-0.100% (inclusive) of S, 0-3.0% (inclusive) of Al and 0-0.200% (inclusive) of O. Secondary phases having an average length of not less than 0.10 μm and an average breadth of not less than 0.05 μm, while satisfying the following relation: average length/average breadth ≥ 2.0 are contained in the steel sheet at a volume fraction of not less than 0.05%.
Inventors:
MURAKAMI HIDEKUNI (JP)
Application Number:
PCT/JP2007/057575
Publication Date:
October 18, 2007
Filing Date:
April 04, 2007
Export Citation:
Assignee:
NIPPON STEEL CORP (JP)
MURAKAMI HIDEKUNI (JP)
MURAKAMI HIDEKUNI (JP)
International Classes:
C22C38/00; B21B1/26; B21B3/00; C21D1/06; C21D9/46; C22C38/60
Foreign References:
| JP2001123245A | 2001-05-08 | |||
| JP2002003987A | 2002-01-09 | |||
| JP2004162150A | 2004-06-10 | |||
| JP2005248281A | 2005-09-15 | |||
| JP2006102766A | 2006-04-20 | |||
| JPH02118026A | 1990-05-02 | |||
| JPH03257123A | 1991-11-15 | |||
| JPH1072640A | 1998-03-17 |
Other References:
See also references of EP 2003221A4
Attorney, Agent or Firm:
SHIGA, Masatake et al. (YaesuChuo-ku, Tokyo, JP)
Download PDF: