Global Patent Index - EP 3050986 B1

EP 3050986 B1 20190731 - HIGH-SPEED-TOOL STEEL AND METHOD FOR PRODUCING SAME

Title (en)

HIGH-SPEED-TOOL STEEL AND METHOD FOR PRODUCING SAME

Title (de)

HOCHGESCHWINDIGKEITSWERKZEUGSTAHL UND VERFAHREN ZUR HERSTELLUNG DAVON

Title (fr)

ACIER POUR OUTIL À VITESSE ÉLEVÉE ET PROCÉDÉ DE PRODUCTION DE CE DERNIER

Publication

EP 3050986 B1 20190731 (EN)

Application

EP 14847363 A 20140624

Priority

  • JP 2013201392 A 20130927
  • JP 2014066736 W 20140624

Abstract (en)

[origin: EP3050986A1] A high speed tool steel including by mass%: C at from 0.40 to 0.90%; Si at 1.00% or less; Mn at 1.00% or less; Cr at from 4.00 to 6.00%; one or both of W and Mo at a content determined by the relational expression (Mo+0.5W) of from 1.50 to 6.00%; and one or both of V and Nb at a content determined by the relational expression (V+Nb) of from 0.50 to 3.00%, in which the content of N is 0.0200% or less, the balance includes Fe and impurities, and the maximum value of the equivalent circle diameter of a carbide in a sectional structure is 1.00 µm or less.

IPC 8 full level

C21C 7/00 (2006.01); C21D 8/06 (2006.01); C22B 9/16 (2006.01); C22C 38/00 (2006.01); C22C 38/26 (2006.01); C22C 38/52 (2006.01)

CPC (source: EP)

C21D 1/25 (2013.01); C21D 8/021 (2013.01); C21D 8/06 (2013.01); C22C 38/00 (2013.01); C22C 38/001 (2013.01); C22C 38/02 (2013.01); C22C 38/04 (2013.01); C22C 38/44 (2013.01); C22C 38/46 (2013.01); C22C 38/48 (2013.01); C22C 38/52 (2013.01); C21D 2211/004 (2013.01); C21D 2211/008 (2013.01)

Citation (opposition)

Opponent : Uddeholms AB,

  • US 3117863 A 19640114 - ROBERTS GEORGE A, et al
  • US 2004187972 A1 20040930 - OZAKI KOZO [JP]
  • WO 03106728 A1 20031224 - UDDEHOLM TOOLING AB [SE], et al
  • EP 1469094 B1 20080109 - HITACHI METALS LTD [JP]
  • EP 0452526 B1 19940706 - HITACHI METALS LTD [JP]
  • JP 2004169177 A 20040617 - DAIDO STEEL CO LTD
  • EP 2055798 A1 20090506 - DAIDO STEEL CO LTD [JP]
  • EP 0733719 A1 19960925 - BOEHLER EDELSTAHL [AT]
  • EP 2196553 B1 20141008 - BÖHLER EDELSTAHL GMBH & CO KG [AT]
  • JP 2013087322 A 20130513 - SANYO SPECIAL STEEL CO LTD
  • JP H01152242 A 19890614 - SANYO SPECIAL STEEL CO LTD
  • JP 2003226939 A 20030815 - NIPPON KOSHUHA STEEL CO LTD
  • JP 2007056289 A 20070308 - HITACHI METALS LTD
  • US 7695576 B2 20100413 - OZAKI KOZO [JP]
  • MANAS SHIRGAOKAR: "TECHNOLOGY TO IMPROVE COMPETITIVENESS IN WARM AND HOT FORGING -INCREASING DIE LIFE AND MATERIAL UTILIZATION", OHIO STATE UNIVERSITY, pages 220 - 225, XP055694049, Retrieved from the Internet <URL:https:/ /www.semanticscholar.org/paper/Technology-to-lmprove-Competitiveness-in-Warm-and-Shirgaokar/279026410cl7de42ba531f6fla215el86b5569c9> [retrieved on 20200512]
  • SHUNSUKE NAKAHAMA, ET AL: "The development of high hard and tough matrix type high speed tool steels", INTERNATIONAL MOLD STEEL: WHITEPAPER, pages 1 - 2, XP055694068, Retrieved from the Internet <URL:http://www.imsteet.com/whitepaper/3_32_concept.html> [retrieved on 20200512]
  • SHUNSUKE NAKAHAMA, YUKINORI MATSUDA, KUNIO NAMIKI, KOZO OZAKI: "The Development of High Hard and Tough Matrix Type High Speed Tool Steels: DRM", DENKI-SEIKO[ELECTRIC FURNACE STEEL], 1 January 2005 (2005-01-01), pages 279 - 286, XP055694075, Retrieved from the Internet <URL:https://www.jstage.jst.go.jp/article/denkiseiko/76/4/76_4_279/_pdf/-char/en> DOI: 10.4262/denkiseiko.76.279
  • SHIGETO TAKEBAYASHI, KOHSAKU USHIODA, NAOKI YOSHINAGA, SHIGENOBU OGATA: "Effect of Carbide Size Distribution on the Impact Toughness of Tempered Martensitic Steels with Two Different Prior Austenite Grain Sizes Evaluated by Instrumented Charpy Test", MATERIALS TRANSACTIONS, THE JAPANESE INSTITUTE OF METALS AND MATERIALS, JP, vol. 54, no. 7, 1 January 2013 (2013-01-01), JP, pages 1110 - 1119, XP055694079, ISSN: 1345-9678, DOI: 10.2320/matertrans.M2013079
  • HATTO JACOBI: "Metallurgie und Werstofftechnik hochreiner Stahle", STAHL UND EISEN, vol. 114, no. 11, 1 January 1994 (1994-01-01), pages 45, XP055694088
  • SINGON KANG, KIM MINWOOK, LEE SEOK-JAE: "Microstructural and Mechanical Characteristics of Novel 6% Cr Cold-Work Tool Steel", METALS, MOLECULAR DIVERSITY PRESERVATION INTERNATIONAL, vol. 7, no. 1, 1 January 2017 (2017-01-01), pages 12 - 19, XP055694099

Opponent : Uddeholms AB, SE 683 85 Hagfors (SE)

  • EP 1300482 A1 20030409 - BOEHLER EDELSTAHL [AT]
  • Retrieved from the Internet <URL:https:/ /www.edelstahl-rostfrei.de/werkstoff /werkstoffdaten>

Designated contracting state (EPC)

AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

DOCDB simple family (publication)

EP 3050986 A1 20160803; EP 3050986 A4 20170517; EP 3050986 B1 20190731; CN 105579604 A 20160511; CN 111411293 A 20200714; JP 2018048407 A 20180329; JP 6474348 B2 20190227; JP WO2015045528 A1 20170309; TW 201527549 A 20150716; TW I654318 B 20190321; WO 2015045528 A1 20150402

DOCDB simple family (application)

EP 14847363 A 20140624; CN 201480052482 A 20140624; CN 202010142274 A 20140624; JP 2014066736 W 20140624; JP 2015538960 A 20140624; JP 2017215934 A 20171108; TW 103125359 A 20140724