Global Patent Index - EP 3859025 B1

EP 3859025 B1 20230503 - OUTER LAYER MATERIAL FOR HOT-ROLLING ROLL, AND COMPOSITE HOTROLLING ROLL

Title (en)

OUTER LAYER MATERIAL FOR HOT-ROLLING ROLL, AND COMPOSITE HOTROLLING ROLL

Title (de)

MATERIAL DER ÄUSSEREN SCHICHT FÜR WARMWALZWALZEN UND WARMWALZVERBUNDWALZEN

Title (fr)

MATÉRIAU DE COUCHE EXTÉRIEURE POUR ROULEAU À CHAUD ET ROULEAU À CHAUD COMPOSITE

Publication

EP 3859025 B1 20230503 (EN)

Application

EP 19889262 A 20191108

Priority

  • JP 2018221998 A 20181128
  • JP 2019043844 W 20191108

Abstract (en)

[origin: EP3859025A1] To provide a composite hot-rolling roll and an outer layer material for a hot-rolling roll that have a wear resistance and fatigue resistance comparable to or higher than those of the related art and in which porosities and shrinkage cavities are reduced.An outer layer material for a hot-rolling roll, the outer layer material having a chemical composition that contains, in mass%, C: 1.6 to 2.5%, Si: 0.2 to 1.5%, Mn: 0.2 to 1.6%, Cr: 4.5 to 7.0%, Mo: 1.0 to 5.0%, V: 4.0 to 6.0%, and Nb: 0.5 to 2.5%, in which a sum of contents of N and O of the chemical composition is 100 to 400 mass ppm, and a balance of the chemical composition is Fe and incidental impurities.

IPC 8 full level

B21B 27/00 (2006.01); B22D 13/02 (2006.01); B22D 13/10 (2006.01); B22D 19/16 (2006.01); C21D 1/25 (2006.01); C21D 5/00 (2006.01); C21D 8/10 (2006.01); C21D 9/14 (2006.01); C21D 9/38 (2006.01); C22C 37/06 (2006.01); C22C 37/10 (2006.01); C22C 38/00 (2006.01); C22C 38/02 (2006.01); C22C 38/04 (2006.01); C22C 38/06 (2006.01); C22C 38/22 (2006.01); C22C 38/24 (2006.01); C22C 38/26 (2006.01); C22C 38/36 (2006.01); C21D 6/00 (2006.01); C21D 6/02 (2006.01)

CPC (source: EP KR)

B21B 27/00 (2013.01 - KR); B22D 13/02 (2013.01 - EP KR); B22D 13/102 (2013.01 - EP); B22D 19/16 (2013.01 - EP); C21D 1/25 (2013.01 - EP); C21D 5/00 (2013.01 - EP KR); C21D 8/105 (2013.01 - EP); C21D 9/14 (2013.01 - EP); C21D 9/38 (2013.01 - EP KR); C22C 37/06 (2013.01 - EP); C22C 37/10 (2013.01 - EP); C22C 38/001 (2013.01 - EP KR); C22C 38/02 (2013.01 - EP); C22C 38/04 (2013.01 - EP); C22C 38/06 (2013.01 - EP); C22C 38/22 (2013.01 - EP KR); C22C 38/24 (2013.01 - EP KR); C22C 38/26 (2013.01 - EP KR); C22C 38/36 (2013.01 - EP); C22C 38/38 (2013.01 - KR); C21D 6/002 (2013.01 - EP); C21D 6/005 (2013.01 - EP); C21D 6/02 (2013.01 - EP); C21D 2251/02 (2013.01 - EP)

Citation (examination)

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 3859025 A1 20210804; EP 3859025 A4 20210929; EP 3859025 B1 20230503; BR 112021009847 A2 20210817; BR 112021009847 B1 20231212; CN 113166864 A 20210723; CN 113166864 B 20220923; JP 6866958 B2 20210428; JP WO2020110660 A1 20210215; KR 102551616 B1 20230704; KR 20210082226 A 20210702; TW 202033786 A 20200916; TW I735082 B 20210801; WO 2020110660 A1 20200604

DOCDB simple family (application)

EP 19889262 A 20191108; BR 112021009847 A 20191108; CN 201980077813 A 20191108; JP 2019043844 W 20191108; JP 2020509132 A 20191108; KR 20217015973 A 20191108; TW 108142124 A 20191120