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US5725689A Expired / Lapsed US ⏱️ 0.0 years remaining

Steel wire of high strength excellent in fatigue characteristics

Assignee: Nippon Steel Corp
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Filing: 1994-10-05
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Granted: 1998-03-10
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Expires: 2014-10-05
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Abstract

Abstract PCT No. PCT/JP94/01665 Sec. 371 Date Nov. 28, 1995 Sec. 102(e) Date Nov. 28, 1995 PCT Filed Oct. 5, 1994 PCT Pub. No. WO95/26422 PCT Pub. Date Oct. 5, 1995The present invention provides a steel wire rod of high strength and a steel wire of high strength excellent in fatigue characteristics used for an extra fine steel wire of high strength and high ductility which is used for a steel cord, a belt cord, and the like for reinforcing rubbers and organic materials such as a tire, a belt and a hose, and for a steel wire of high strength which is used for a rope, a PC wire, and the like. The steel of the present invention comprises, based on mass, 0.7 to 1.1% of C, 0.1 to 1.5% of Si, 0.1 to 1.5% of Mn, up to 0.02% of P, up to 0.02% of S and the balance Fe and unavoidable impurities, and contains nonmetallic inclusions at least 80% of which comprise 4 to 60% of CaO+MnO, 22 to 87% of SiO2 and 0 to 46% of Al2O3 and have melting points up to 1,500 DEG C.

Inventors

  • 👤 Seiki Nishida
  • 👤 Junji Nakashima
  • 👤 Osami Serikawa
  • 👤 Ikuo Ochiai

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-03 11:37
CPC Classifications
C; C22; C22C; C22C38/00; C22C38/04; C22C38/18; C22C38/40; C22C38/42

Claims Analysis

Total Claims: 8
Claim 1
Independent Claim 97 words
A steel wire of high strength excellent in fatigue characteristics comprising, by mass %, 0.7 to 1.1% of C, 0.1 to 1.5% of Si, 0.1 to 1.5% of Mn, up to 0.02% of P, up to 0.02% of S and the balance Fe and unavoidable impurities, and containing nonmetallic inclusions at least 80% of which comprise 4 to 60% of CaO+MnO, 22 to 87% of SiO 2 and 0 to 46% of Al 2 O 3 and have melting points up to 1,500° C., and at least 70% of which have aspect ratios of at least 10.
Claim 2
Dependent Claim 97 words
A steel wire of high strength excellent in fatigue characteristics comprising, by mass %, 0.7 to 1.1% of C, 0.1 to 1.5% of Si, 0.1 to 1.5% of Mn, up to 0.02% of P, up to 0.02% of S and the balance Fe and unavoidable impurities, and containing nonmetallic inclusions at least 80% of which comprise 4 to 60% of CaO+MnO, 22 to 87% of SiO 2 and 0 to 46% of Al 2 O 3 and have melting points up to 1,500° C., and at least 70% of which have aspect ratios of at least 10.
Claim 3
Dependent Claim 108 words
A steel wire of high strength comprising, by mass %, 0.7 to 1.1% of C, 0.1 to 1.5% of Si, 0.1 to 1.5% of Mn, up to 0.02% of P, up to 0.02% of S, up to 0.3% of Cr, up to 1.0% of Ni, up to 0.8% of Cu and the balance Fe and unavoidable impurities, and containing nonmetallic inclusions at least 80% of which comprise 4 to 60% of CaO+MnO, 22 to 87% of SiO 2 and 0 to 46% of Al 2 O 3 and have melting points up to 1,500° C., and at least 70% of which have aspect ratios of at least 10.
Claim 4
Dependent Claim 108 words
A steel wire of high strength comprising, by mass %, 0.7 to 1.1% of C, 0.1 to 1.5% of Si, 0.1 to 1.5% of Mn, up to 0.02% of P, up to 0.02% of S, up to 0.3% of Cr, up to 1.0% of Ni, up to 0.8% of Cu and the balance Fe and unavoidable impurities, and containing nonmetallic inclusions at least 80% of which comprise 4 to 60% of CaO+MnO, 22 to 87% of SiO 2 and 0 to 46% of Al 2 O 3 and have melting points up to 1,500° C., and at least 70% of which have aspect ratios of at least 10.
Claim 5
Dependent Claim 28 words
The steel wire of high strength excellent in fatigue characteristics according to claim 1, wherein the structure of the wire comprises at least 95% of a pearlitic structure.
Claim 6
Dependent Claim 28 words
The steel wire of high strength excellent in fatigue characteristics according to claim 1, wherein the structure of the wire comprises at least 70% of a bainitic structure.
Claim 7
Dependent Claim 28 words
The steel wire of high strength excellent in fatigue characteristics according to claim 2, wherein the structure of the wire comprises at least 95% of a pearlitic structure.
Claim 8
Dependent Claim 28 words
The steel wire of high strength excellent in fatigue characteristics according to claim 2, wherein the structure of the wire comprises at least 70% of a bainitic structure.

References Cited (Backward Citations)

JPS5071507A Cited
JPS5081907A Cited
JPS5524961A Cited
JPS565915A Cited
JPS60204865A Cited
JPS6299437A Cited
JPS6299436A Cited
JPS6324046A Cited
JPH032352A Cited
JPH046211A Cited
US5211772A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 2001-03-09 2001-09-08 2002-03-10 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 2005-03-09 2005-09-08 2006-03-10 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 2009-03-09 2009-09-08 2010-03-10 $7700.00 Window Closed / Lapsed

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