Global Patent Index - EP 3655560 B1

EP 3655560 B1 20210915 - FLAT STEEL PRODUCT WITH A HIGH DEGREE OF AGING RESISTANCE, AND METHOD FOR PRODUCING SAME

Title (en)

FLAT STEEL PRODUCT WITH A HIGH DEGREE OF AGING RESISTANCE, AND METHOD FOR PRODUCING SAME

Title (de)

STAHLFLACHPRODUKT MIT GUTER ALTERUNGSBESTÄNDIGKEIT UND VERFAHREN ZU SEINER HERSTELLUNG

Title (fr)

PRODUIT PLAT EN ACIER POSSÉDANT UNE BONNE RÉSISTANCE AU VIEILLISSEMENT ET SON PROCÉDÉ DE FABRICATION

Publication

EP 3655560 B1 20210915 (DE)

Application

EP 18736938 A 20180711

Priority

  • EP 2017068522 W 20170721
  • EP 2018068767 W 20180711

Abstract (en)

[origin: WO2019016041A1] The invention relates to a coated flat steel product which is suitable for press hardening and which exhibits a particularly high degree of aging resistance and to a method for producing same. In addition to iron and unavoidable impurities, the steel of the flat steel product consists of (in weight percents) 0.10 - 0.4 % C, 0.05 - 0.5 % Si, 0.5 - 3.0 % Mn, 0.01 - 0.2 % Al, 0.005 - 1.0 % Cr, 0.001 - 0.2 % V, ≤ 0.1 % P, ≤ 0.05 % S, ≤ 0.02 % N, and optionally one or more of the elements "B, Ti, Nb, Ni, Cu, Mo, W" in the following percentages B: 0.0005 - 0.01 %, Ti: 0.001 - 0.1 %, Nb: 0.001 - 0.1 %, Ni: 0.01 - 0.4 %, Cu: 0.01 - 0.8 %, Mo: 0.002 - 1.0 %, W: 0.001 - 1.0 %. The flat steel product has a yield limit with a continuous curve or a yield limit with a difference between the upper yield limit value and the lower yield limit value of maximally 45 MPa and a uniform elongation Ag of at least 11.5%.

IPC 8 full level

C22C 38/00 (2006.01); C21D 8/02 (2006.01); C21D 9/46 (2006.01); C22C 38/02 (2006.01); C22C 38/04 (2006.01); C22C 38/06 (2006.01); C22C 38/12 (2006.01); C22C 38/24 (2006.01); C22C 38/28 (2006.01); C22C 38/32 (2006.01); C23C 2/12 (2006.01); C23C 2/28 (2006.01)

CPC (source: CN EP US)

C21D 1/26 (2013.01 - CN); C21D 8/0226 (2013.01 - CN EP); C21D 8/0236 (2013.01 - EP); C21D 8/0273 (2013.01 - EP); C21D 8/0278 (2013.01 - EP); C21D 9/46 (2013.01 - EP); C22C 38/001 (2013.01 - EP); C22C 38/02 (2013.01 - EP); C22C 38/04 (2013.01 - EP); C22C 38/06 (2013.01 - EP); C22C 38/12 (2013.01 - EP); C22C 38/20 (2013.01 - CN); C22C 38/22 (2013.01 - CN); C22C 38/24 (2013.01 - CN EP); C22C 38/26 (2013.01 - CN); C22C 38/28 (2013.01 - CN EP); C22C 38/32 (2013.01 - CN EP); C22C 38/38 (2013.01 - CN); C22C 38/42 (2013.01 - CN); C22C 38/44 (2013.01 - CN); C22C 38/46 (2013.01 - CN); C22C 38/50 (2013.01 - CN); C22C 38/54 (2013.01 - CN); C22C 38/58 (2013.01 - CN); C23C 2/12 (2013.01 - CN EP); C23C 2/29 (2022.08 - CN EP US)

Citation (opposition)

Opponent : ARCELORMITTAL

  • JP 5387073 B2 20140115
  • US 2009238715 A1 20090924 - CHO YEOL-RAE [KR], et al
  • EP 2703511 A1 20140305 - NIPPON STEEL & SUMITOMO METAL CORP [JP]
  • WO 2004104254 A1 20041202 - USINOR [FR], et al
  • FR 2546534 A1 19841130 - USINOR [FR]
  • WO 2017103138 A1 20170622 - AUTOTECH ENG A I E [ES]
  • FEUER PETER SEBASTIAN: "Ein Ansatz zur Herstellung von pressgehaerteten Karosseriekomponenten mit massgeschneiderten mechanischen Eigenschaften: Temperierte Umformwerkzeuge. Prozessfenster, Prozesssimulation und funktionale Untersuchung", FERTIGUNGSTECHNIK- ERLANGEN, 1 January 2012 (2012-01-01), pages 1 - 226, XP055811916
  • GEIGER, ET AL: "Auslegung des Prozessfensters für die Blechumformung höchstfester Vergütungsstähle bei erhöhten Temperaturen, Determination of the process window for hot stamping", 1 January 2006 (2006-01-01), pages 1 - 76, XP055939098
  • XIAO GANG, ET AL: "Heat transfer during the solidification of hot dip aluminizing coating", CHINESE JOURNAL OF MECHANICAL ENGINEERING, vol. 24, no. 3, 1 January 2011 (2011-01-01), pages 460 - 465, XP055939102
  • DR LACHMANN, ET AL.: "Legierter Vergü- tungsstahl 22MnB5 unbeschichtet oder vorbeschichtet", TECHNISCHE LIEFERSPEZIFIKATION TL VW 4225-2006:5, 1 May 2006 (2006-05-01), pages 1 - 11, XP055518195, [retrieved on 20181023]
  • THYSSENKRUPP: "Manganese-boron steels MBW® For hot forming", 1 November 2014 (2014-11-01), pages 1 - 15, XP055939145
  • ZHONG-XIANG ET AL.: "Thermo-mechanical behavior of the Al-Si alloy coated hot stamping boron steel", MATERIALS AND DESIGN, vol. 60, 2014, pages 26 - 33, XP029028754, DOI: 10.1016/j.matdes.2014.03.011
  • LIANG WEIKANG; TAO WENJIE; ZHU BIN; ZHANG YISHENG: "Influence of heating parameters on properties of the Al-Si coating applied to hot stamping", SCIENCE CHINA TECHNOLOGICAL SCIENCES, vol. 60, no. 7, 3 May 2017 (2017-05-03), Heidelberg , pages 1088 - 1102, XP036270055, ISSN: 1674-7321, DOI: 10.1007/s11431-016-0231-y
  • ANONYMOUS: "Metallic materials - Tensile testing Part 1: Method of test at ambient temperature", EUROPEAN STANDARD EN 10002-1, 1 July 2001 (2001-07-01), XP055488243
  • KEELER (ED.): "Advanced high-strength steels Application Guidelines Version 6.0", WORLD AUTO STEEL, April 2017 (2017-04-01), pages 1 - 314
  • LECHLER JÜRGEN: "Beschreibung und Modellierung des Werkstoffverhaltens von presshärtbaren Bor-Manganstählen", 1 January 2009, MEISENBACH VERLAG, Bamberg, ISBN: 978-3-87525-286-6, pages: 1 - 176, XP055939775
  • RASERA JOSHUA: "Development of a novel technology for rapidly Austenitizing Usibor® 1500 P steel", THESIS UNIVERSITY OF WATERLOO, ONTARIO, CANADA, 1 January 2015 (2015-01-01), pages 1 - 92, XP055939761
  • J. J. DUFRANE: ""Why do we Need to Measure Trace Elements in Steel ?"", JOURNAL DE PHYSIQUE IV, EDITIONS DE PHYSIQUE, vol. 05, no. C7, 1 November 1995 (1995-11-01), FR , pages C7-23 - C7-31, XP055628990, ISSN: 1155-4339, DOI: 10.1051/jp4:1995702
  • DAIGO ICHIRO, ET AL: "Potential Influences of Impurities on Properties of Recycled Carbon Steel", ISIJ INTERNATIONAL, 9 September 2020 (2020-09-09), pages 1 - 8, XP055939767
  • ANONYMOUS: "22MnB5 Boron alloyed quenched and tempered steel", SALZGITTER FLACHSTAHL, 1 January 2014 (2014-01-01), pages 1 - 3, XP055811926
  • GRUMBACH MARC: "Vieillissement des aciers", TECHNIQUES DE L'INGÉNIEUR, vol. M235, 1 January 2015 (2015-01-01), pages 1 - 21, XP055939771

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)

WO 2019016041 A1 20190124; CN 109280861 A 20190129; CN 110959049 A 20200403; CN 110959049 B 20220408; CN 114686777 A 20220701; CN 114686777 B 20240223; EP 3655560 A1 20200527; EP 3655560 B1 20210915; EP 3974554 A1 20220330; ES 2899657 T3 20220314

DOCDB simple family (application)

EP 2018068767 W 20180711; CN 201710986829 A 20171020; CN 201880048391 A 20180711; CN 202111680357 A 20180711; EP 18736938 A 20180711; EP 21196113 A 20180711; ES 18736938 T 20180711