Title:
MEDIUM CARBON STEEL SHEET, QUENCHED MEMBER, AND METHOD FOR MANUFACTURING MEDIUM CARBON STEEL SHEET AND QUENCHED MEMBER
Document Type and Number:
WIPO Patent Application WO/2013/035848
Kind Code:
A1
Abstract:
This medium carbon steel sheet contains 0.10-0.80% of C, 0.01-0.3% of Si, 0.3-2.0% of Mn, 0.001-0.03% of P, 0.0001-0.01% of S, 0.001-0.10% of Al, and 0.001-0.01% of N (percentages given with respect to weight); the average carbide diameter is 0.4 μm or less; the ratio of the number of carbides that are 1.5 times or greater than the size of the average carbide diameter is 30% or less of the total number of carbides; the carbide spheroidizing rate is 90% or greater; the average ferrite grain size is 10 μm or greater; and the tensile strength (TS) is 550 MPa or less.
Inventors:
TAKEDA KENGO (JP)
TSUKANO YASUSHI (JP)
ARAMAKI TAKASHI (JP)
TSUKANO YASUSHI (JP)
ARAMAKI TAKASHI (JP)
Application Number:
PCT/JP2012/072920
Publication Date:
March 14, 2013
Filing Date:
September 07, 2012
Export Citation:
Assignee:
NIPPON STEEL & SUMITOMO METAL CORP (JP)
TAKEDA KENGO (JP)
TSUKANO YASUSHI (JP)
ARAMAKI TAKASHI (JP)
TAKEDA KENGO (JP)
TSUKANO YASUSHI (JP)
ARAMAKI TAKASHI (JP)
International Classes:
C22C38/00; C21D8/02; C21D9/46; C22C38/06; C22C38/60
Foreign References:
| JP2011168842A | 2011-09-01 | |||
| JP2007291468A | 2007-11-08 | |||
| JPH1180885A | 1999-03-26 | |||
| JP2001220642A | 2001-08-14 | |||
| JP2008196046A | 2008-08-28 | |||
| JP2007119819A | 2007-05-17 |
Attorney, Agent or Firm:
SHIGA Masatake et al. (JP)
Masatake Shiga (JP)
Masatake Shiga (JP)
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Claims: