Title:
STEEL MATERIAL AND PROCESS FOR PRODUCING SAME
Document Type and Number:
WIPO Patent Application WO/2015/102050
Kind Code:
A1
Abstract:
This steel material has a chemical composition containing, in terms of mass%, 0.050-0.40% C, 0.50-3.0% Si, 3.0-8.0% Mn, and 0.001-3.0% sol.Al and has a metallographic structure containing, in terms of vol%, 10-40% austenite, the austenite having an average C concentration of 0.30-0.60% in terms of mass% and the metallographic structure having a structure evenness, which is a value obtained by subtracting the minimum of measured Vickers hardness values from the maximum thereof, of 30 Hv or less. The steel material has a tensile strength of 900-1,800 MPa.
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Inventors:
HAYASHI KOUTAROU (JP)
SEKI AKIRA (JP)
MISHIO KAZUYA (JP)
SHIMOKAWA SHUHEI (JP)
SEKI AKIRA (JP)
MISHIO KAZUYA (JP)
SHIMOKAWA SHUHEI (JP)
Application Number:
PCT/JP2014/050022
Publication Date:
July 09, 2015
Filing Date:
January 06, 2014
Export Citation:
Assignee:
NIPPON STEEL & SUMITOMO METAL CORP (JP)
International Classes:
C22C38/00; C21D6/00; C21D9/46
Foreign References:
| JPH073328A | 1995-01-06 | |||
| JP2006131958A | 2006-05-25 | |||
| JP2007327123A | 2007-12-20 | |||
| JP2010196115A | 2010-09-09 | |||
| JP2013163827A | 2013-08-22 | |||
| JP2014025091A | 2014-02-06 | |||
| JP2004269920A | 2004-09-30 | |||
| JP2010090475A | 2010-04-22 | |||
| JP2003138345A | 2003-05-14 |
Other References:
See also references of EP 3093358A4
Attorney, Agent or Firm:
SHIGA Masatake et al. (JP)
Masatake Shiga (JP)
Masatake Shiga (JP)
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