Title:
ROLLED STEEL BAR OR ROLLED WIRE MATERIAL FOR COLD-FORGED COMPONENT
Document Type and Number:
WIPO Patent Application WO/2016/080315
Kind Code:
A1
Abstract:
A rolled steel bar or rolled wire material for use in a cold-forged component and having a prescribed chemical composition, wherein Y1 represented by Y1=(Mn)×(Cr) and Y2 represented by Y2=0.134×(D/25.4-(0.50×√(C)))/(0.50×√(C)) satisfy Y1>Y2, the tensile strength thereof is 750 MPa or less, the internal structure thereof is a ferrite/pearlite structure, and the ferrite fraction constitutes 40% or more of the internal structure.
Inventors:
MATSUI NAOKI (JP)
NEISHI YUTAKA (JP)
CHIDA TETSUSHI (JP)
OBATA AKIHISA (JP)
HORI SHOJI (JP)
CHIBA KEISUKE (JP)
NEISHI YUTAKA (JP)
CHIDA TETSUSHI (JP)
OBATA AKIHISA (JP)
HORI SHOJI (JP)
CHIBA KEISUKE (JP)
Application Number:
PCT/JP2015/082007
Publication Date:
May 26, 2016
Filing Date:
November 13, 2015
Export Citation:
Assignee:
NIPPON STEEL & SUMITOMO METAL CORP (JP)
International Classes:
C22C38/00; B21B1/16; C22C38/32; C22C38/54; C21D8/06
Foreign References:
| JP2012136730A | 2012-07-19 | |||
| JP2011001599A | 2011-01-06 | |||
| JP2002294401A | 2002-10-09 | |||
| JP2008255398A | 2008-10-23 |
Other References:
See also references of EP 3222742A4
Attorney, Agent or Firm:
SHIGA Masatake et al. (JP)
Masatake Shiga (JP)
Masatake Shiga (JP)
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