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Title:
STEEL WIRE AND COATED STEEL WIRE
Document Type and Number:
WIPO Patent Application WO/2018/069955
Kind Code:
A1
Abstract:
This steel wire has a chemical composition containing, in % by mass, 0.40%–1.10% C, 0.005%–0.350% Si, 0.05%–0.90% Mn, 0%–0.70% Cr, 0%–0.070% Al, 0%–0.050% Ti, 0%–0.10% V, 0%–0.050% Nb, 0%–0.20% Mo, and 0%–0.0030% B, with the remainder being Fe and impurities. A metal structure inside a cross-section includes at least 80 area% of a pearlite structure having lamellar cementite. The average lamellar spacing between lamellar cementite is 28–80 nm. The average length of the lamellar cementite is no more than 22.0 µm. At least 40 area% of the pearlite structure has lamellar cementite having an inclination of no more than 15° relative to the longitudinal direction of the steel wire. The degree of integration in the ferrite {110} plane relative to said longitudinal direction is 2.0–8.0 and the diameter is at least 1.4 mm.

Inventors:
MANABE TOSHIYUKI (JP)
TESHIMA TOSHIHIKO (JP)
Application Number:
PCT/JP2016/080066
Publication Date:
April 19, 2018
Filing Date:
October 11, 2016
Export Citation:
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Assignee:
NIPPON STEEL & SUMITOMO METAL CORP (JP)
International Classes:
C22C38/00; C22C38/32
Domestic Patent References:
WO2011055746A12011-05-12
WO2014054756A12014-04-10
Foreign References:
JP2016056438A2016-04-21
JPH07286244A1995-10-31
KR20110047383A2011-05-09
JP2001176333A2001-06-29
JP2003226938A2003-08-15
Other References:
See also references of EP 3527682A4
A. LAMONTAGNE ET AL.: "Comparative study and quantification of cementite decomposition in heavily drawn pearlitic steel wires", MATERIALS SCIENCE & ENGINEERING, vol. A 644, 2015, pages 105 - 113
Attorney, Agent or Firm:
SHIGA Masatake et al. (JP)
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