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WO2004081250A3 - Steel having finely dispersed inclusions - Google Patents

Steel having finely dispersed inclusions Download PDF

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Publication number
WO2004081250A3
WO2004081250A3 PCT/JP2004/003251 JP2004003251W WO2004081250A3 WO 2004081250 A3 WO2004081250 A3 WO 2004081250A3 JP 2004003251 W JP2004003251 W JP 2004003251W WO 2004081250 A3 WO2004081250 A3 WO 2004081250A3
Authority
WO
WIPO (PCT)
Prior art keywords
inclusions
steel
rem
formula
finely dispersed
Prior art date
Application number
PCT/JP2004/003251
Other languages
French (fr)
Other versions
WO2004081250A2 (en
Inventor
Hiroshi Hirata
Kohichi Isobe
Original Assignee
Nippon Steel Corp
Hiroshi Hirata
Kohichi Isobe
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nippon Steel Corp, Hiroshi Hirata, Kohichi Isobe filed Critical Nippon Steel Corp
Priority to US10/547,303 priority Critical patent/US20060157162A1/en
Publication of WO2004081250A2 publication Critical patent/WO2004081250A2/en
Publication of WO2004081250A3 publication Critical patent/WO2004081250A3/en

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/005—Ferrous alloys, e.g. steel alloys containing rare earths, i.e. Sc, Y, Lanthanides

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Treatment Of Steel In Its Molten State (AREA)
  • Rolling Contact Bearings (AREA)

Abstract

An object of the invention is to provide a steel having good fatigue life characteristics and acoustic characteristics by eliminating the harmful effects of oxide based inclusions. The object is attained by the following steel. A steel having at least a part comprising: REM of which amount meets formula (1); and REM-containing inclusions of which number meets formula (2); wherein the concentration of A1203 in the REM-containing inclusions is 30 mass% or less (including 0%); Formula (1) ; -30 < REM (ppm) - (T.O (ppm)x 280/48) < 50, Formula (2) ; number of REM-containing inclusions/total number of inclusions > 0.8, wherein the inclusions of Formula (2) having an equivalent diameter of 1µm or more.
PCT/JP2004/003251 2003-03-13 2004-03-11 Steel having finely dispersed inclusions WO2004081250A2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US10/547,303 US20060157162A1 (en) 2003-03-13 2004-03-11 Steel having finely dispersed inclusions

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2003-068541 2003-03-13
JP2003068541A JP4256701B2 (en) 2003-03-13 2003-03-13 Inclusion finely dispersed steel with excellent fatigue life

Publications (2)

Publication Number Publication Date
WO2004081250A2 WO2004081250A2 (en) 2004-09-23
WO2004081250A3 true WO2004081250A3 (en) 2005-03-03

Family

ID=32984592

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2004/003251 WO2004081250A2 (en) 2003-03-13 2004-03-11 Steel having finely dispersed inclusions

Country Status (5)

Country Link
US (1) US20060157162A1 (en)
JP (1) JP4256701B2 (en)
KR (1) KR100675709B1 (en)
CN (1) CN100427628C (en)
WO (1) WO2004081250A2 (en)

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2566130C2 (en) * 2010-07-02 2015-10-20 Актиеболагет Скф Bearing part made by butt fusion welding
KR101271899B1 (en) * 2010-08-06 2013-06-05 주식회사 포스코 High carbon and chromium bearing steel and method for manufacturing the same
WO2013058131A1 (en) 2011-10-20 2013-04-25 新日鐵住金株式会社 Bearing steel and method for producing same
KR101492782B1 (en) * 2011-10-25 2015-02-12 신닛테츠스미킨 카부시키카이샤 Steel sheet
JP5712945B2 (en) * 2012-02-03 2015-05-07 新日鐵住金株式会社 Method for melting low-sulfur steel
CN102732685A (en) * 2012-06-20 2012-10-17 内蒙古包钢钢联股份有限公司 Method for adding rare earth into RH refining furnace
JP5833984B2 (en) * 2012-07-24 2015-12-16 株式会社神戸製鋼所 Bearing steel and bearing parts with excellent rolling fatigue characteristics
US9809875B2 (en) 2012-10-19 2017-11-07 Nippon Steel & Sumitomo Metal Corporation Case hardening steel with excellent fatigue properties
IN2015DN00826A (en) 2012-10-19 2015-06-12 Nippon Steel & Sumitomo Metal Corp
KR101742902B1 (en) 2013-04-23 2017-06-01 신닛테츠스미킨 카부시키카이샤 Spring steel having excellent fatigue characteristics and process for manufacturing same
BR112020025070B1 (en) * 2018-06-26 2023-11-14 Nippon Steel Corporation STEEL PRODUCTION METHOD
CN110079728B (en) * 2019-04-09 2020-07-10 东北大学 High-strength twisted steel with good weldability and manufacturing method thereof
US20220230775A1 (en) * 2019-06-28 2022-07-21 Sumitomo Electric Industries, Ltd. Copper-coated steel wire, stranded wire, insulated electric wire, and cable
CN110592319B (en) * 2019-09-10 2020-12-01 中国科学院金属研究所 Rare earth microalloyed steel and control method
CN110484811B (en) * 2019-09-10 2020-07-28 中国科学院金属研究所 A kind of ultra-clean rare earth steel and inclusion modification control method
CN110438389B (en) * 2019-09-16 2021-03-16 内蒙古工业大学 Production method of high-purity rare earth steel
CN112322988A (en) * 2020-11-23 2021-02-05 浙江宝武钢铁有限公司 High-wear-resistance bearing steel electroslag ingot and processing technology thereof

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0829546A1 (en) * 1996-03-25 1998-03-18 Kawasaki Steel Corporation Process for producing aluminum-killed steel free of cluster
JP2000008138A (en) * 1998-06-19 2000-01-11 Kawasaki Steel Corp Hot rolled steel sheet for reroll and method for producing the same

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3666570A (en) * 1969-07-16 1972-05-30 Jones & Laughlin Steel Corp High-strength low-alloy steels having improved formability
US3933480A (en) * 1972-09-18 1976-01-20 Republic Steel Corporation Method of making stainless steel having improved machinability
EP0458646B1 (en) * 1990-05-23 1997-09-10 Aichi Steel Works, Ltd. Bearing steel
TW408184B (en) * 1997-09-29 2000-10-11 Kawasaki Steel Co Manufacturing method for producing Titanium killed steel with smooth surface texture

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0829546A1 (en) * 1996-03-25 1998-03-18 Kawasaki Steel Corporation Process for producing aluminum-killed steel free of cluster
JP2000008138A (en) * 1998-06-19 2000-01-11 Kawasaki Steel Corp Hot rolled steel sheet for reroll and method for producing the same

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
P.E.WAUDBY: "Rare earht additions to steel", INTERNATIONAL METALS REVIEWS, vol. 23, no. 2, 1978, GB, pages 74 - 98, XP008033253 *
PATENT ABSTRACTS OF JAPAN vol. 2000, no. 04 31 August 2000 (2000-08-31) *
S. BERETTA, Y. MURAKAMI: "Largest-extreme-Value Distribution Analysis of Multiple Inclusion Types in Determining Steel Cleanliness", METALLURGICAL AND MATERIALS TRANSACTIONS B, vol. 32, no. B, June 2001 (2001-06-01), pages 517 - 523, XP008039923 *

Also Published As

Publication number Publication date
JP2004277777A (en) 2004-10-07
CN100427628C (en) 2008-10-22
US20060157162A1 (en) 2006-07-20
WO2004081250A2 (en) 2004-09-23
CN1759199A (en) 2006-04-12
KR100675709B1 (en) 2007-02-02
KR20050103978A (en) 2005-11-01
JP4256701B2 (en) 2009-04-22

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