Title:
Si-KILLED STEEL WIRE ROD HAVING EXCELLENT FATIGUE PROPERTIES, AND SPRING USING SAME
Document Type and Number:
WIPO Patent Application WO/2014/112532
Kind Code:
A1
Abstract:
This Si-killed steel wire rod has Si-killed steel which contains specific chemical components that contain, as 80% or more of the number of inclusions, specific CaO-Al2O3-SiO2 inclusions, wherein the average composition of the MnO-Al2O3-SiO2 inclusions that satisfies the following (3A) satisfies the following (3B). (3A) If CaO + Al2O3 + SiO2 + MgO + MnO serves as the 100% standard, MnO + Al2O3 + SiO2
> 80%, MnO > CaO. (3B) When CaO + Al2O3 + SiO2 + MgO + MnO serves as the 100% standard, MnO: 10 to 70%, Al2O3: 3 to 50%, SiO2:20 to 75%.
Inventors:
SUGIMURA TOMOKO
SAKAI HIROAKI
YOSHIDA YASUMASA
TAI HIROFUMI
OHTA HIROKI
ONODA HIROYUKI
SAKAI HIROAKI
YOSHIDA YASUMASA
TAI HIROFUMI
OHTA HIROKI
ONODA HIROYUKI
Application Number:
PCT/JP2014/050594
Publication Date:
July 24, 2014
Filing Date:
January 15, 2014
Export Citation:
Assignee:
KOBE STEEL LTD (JP)
International Classes:
C22C38/00; C22C38/04; C22C38/58; F16F1/02; C21C7/00; C21C7/04; C21C7/076
Domestic Patent References:
| WO2000077271A1 | 2000-12-21 |
Foreign References:
| JP2010024539A | 2010-02-04 | |||
| JP2009275262A | 2009-11-26 | |||
| JP2008163424A | 2008-07-17 | |||
| JPH10130714A | 1998-05-19 | |||
| JPH0234748A | 1990-02-05 | |||
| JPH076037B2 | 1995-01-25 | |||
| JPH0674484B2 | 1994-09-21 | |||
| JPH0674485B2 | 1994-09-21 | |||
| JP2898472B2 | 1999-06-02 | |||
| JP4134204B2 | 2008-08-20 | |||
| JP4347786B2 | 2009-10-21 | |||
| JP4423050B2 | 2010-03-03 |
Other References:
TSUYOSHI MIMURA: "182 and 183rd Nishiyama Memorial Technical Lecture", 2004, article "Inclusion Control and High Cleanliness Steel Production Technology", pages: 125
See also references of EP 2947168A4
See also references of EP 2947168A4
Attorney, Agent or Firm:
HAMADA Yuriko et al. (JP)
Yuriko Hamada (JP)
Yuriko Hamada (JP)
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