Title:
CARBON STEEL WIRE WITH HIGH STRENGTH AND EXCELLENT DUCTILITY AND FATIGUE RESISTANCE, PROCESS FOR PRODUCING SAME, AND METHOD OF EVALUATION
Document Type and Number:
WIPO Patent Application WO/2010/050596
Kind Code:
A1
Abstract:
Provided are a carbon steel wire which has a high strength that has not been attained so far and which has excellent ductility and fatigue resistance, a process for producing the wire, and a method of evaluating the wire.
The carbon steel wire (1) has a carbon content of 0.50-1.10 mass%. In the wire, the ratio of the hardness of a surface layer part (13) in a cross section (12) to the hardness of a surface layer part (3) in a longitudinal section (2), i.e., coefficient X (cross-section hardness/longitudinal-section hardness), and the ratio of the hardness of the center (14) in the cross section (12) to the hardness of a central part (4) in the longitudinal section (2), i.e., coefficient X (cross-section hardness/longitudinal-section hardness), each satisfies the relationship 0.9
Inventors:
SHIMIZU WATARU (JP)
Application Number:
PCT/JP2009/068711
Publication Date:
May 06, 2010
Filing Date:
October 30, 2009
Export Citation:
Assignee:
BRIDGESTONE CORP (JP)
SHIMIZU WATARU (JP)
SHIMIZU WATARU (JP)
International Classes:
B21C1/00; D07B1/06
Foreign References:
JP2002113541A | 2002-04-16 | |||
JP2006249561A | 2006-09-21 | |||
JP2008208450A | 2008-09-11 | |||
JPH08156514A | 1996-06-18 | |||
JPH08311788A | 1996-11-26 | |||
JPH07305285A | 1995-11-21 | |||
JPH05200428A | 1993-08-10 |
Other References:
See also references of EP 2351621A4
Attorney, Agent or Firm:
HONDA ICHIRO (JP)
Ichiro Honda (JP)
Ichiro Honda (JP)
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