Title:
HIGH-CARBON STEEL WIRE HAVING EXCELLENT DRAWABILITY AND FATIGUE PROPERTIES AFTER DRAWING
Document Type and Number:
WIPO Patent Application WO/2012/118093
Kind Code:
A1
Abstract:
Provided is high-performance, high-carbon steel wire having a very low breakage rate during drawing, even under harsh conditions, and excellent fatigue properties after drawing, wherein the inclusions after wire rolling are finely ground. The steel is characterized in that the steel has a specific composition and that the percentage of the number of individual inclusions satisfying (%SiO2)=40 to 95%, (%CaO) = 0.5 to 30%, (%AI2O3) = 0.5 to 30%, (%MgO) = 0.5 to 20%, (%MnO)= 0.5 to 10%, and further, satisfying (% Na) =0.2 to 7%, and (%F) = 0.17 to 8% ("composition-targeted inclusions" hereafter) among the oxide non-metal inclusions having a minor axis of 0.5 µm, major axis of 1.0 µm or greater, and an equivalent circle diameter of 1 µm or greater in terms of the wire cross section in the direction L ("size-targeted inclusions" hereafter), or the number of individual composition-targeted inclusions/the number of individual size-targeted inclusions × 100, is 80%.
Inventors:
HASEGAWA HAJIME (JP)
YAMADA WATARU (JP)
KIYOSE AKIHITO (JP)
KUDOU KOUICHI (JP)
YAMASAKI SHINGO (JP)
YAMADA WATARU (JP)
KIYOSE AKIHITO (JP)
KUDOU KOUICHI (JP)
YAMASAKI SHINGO (JP)
Application Number:
PCT/JP2012/054971
Publication Date:
September 07, 2012
Filing Date:
February 28, 2012
Export Citation:
Assignee:
NIPPON STEEL CORP (JP)
HASEGAWA HAJIME (JP)
YAMADA WATARU (JP)
KIYOSE AKIHITO (JP)
KUDOU KOUICHI (JP)
YAMASAKI SHINGO (JP)
HASEGAWA HAJIME (JP)
YAMADA WATARU (JP)
KIYOSE AKIHITO (JP)
KUDOU KOUICHI (JP)
YAMASAKI SHINGO (JP)
International Classes:
C22C38/00; C21C7/04; C21C7/06; C22C38/06; C22C38/54
Foreign References:
| JP2007197812A | 2007-08-09 | |||
| JP2007289965A | 2007-11-08 | |||
| JPS6233094A | 1987-02-13 | |||
| JPS5722969B2 | 1982-05-15 | |||
| JPS5524961A | 1980-02-22 | |||
| JPS547252B2 | 1979-04-05 | |||
| JPS5081907A | 1975-07-03 | |||
| JPS5735243B2 | 1982-07-28 | |||
| JPH048499B2 | 1992-02-17 | |||
| JP3294245B2 | 2002-06-24 | |||
| JP2654099B2 | 1997-09-17 | |||
| JP3719131B2 | 2005-11-24 | |||
| JP2005029888A | 2005-02-03 | |||
| JP4315825B2 | 2009-08-19 |
Other References:
IRON AND STEEL INSTITUTE OF JAPAN: "Iron and Steel Handbook, Third Edition", article "II. Iron-making and Steel-making,", pages: 690
Attorney, Agent or Firm:
AOKI, Atsushi et al. (JP)
Aoki 篤 (JP)
Aoki 篤 (JP)
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Claims: