EP 4208576 A1 20230712 - STEEL COMPONENT PRODUCED BY HOT-SHAPING A STEEL FLAT PRODUCT, STEEL FLAT PRODUCT AND METHOD FOR PRODUCING A STEEL COMPONENT
Title (en)
STEEL COMPONENT PRODUCED BY HOT-SHAPING A STEEL FLAT PRODUCT, STEEL FLAT PRODUCT AND METHOD FOR PRODUCING A STEEL COMPONENT
Title (de)
DURCH WARMUMFORMEN EINES STAHLFLACHPRODUKTS HERGESTELLTES STAHLBAUTEIL, STAHLFLACHPRODUKT UND VERFAHREN ZUR HERSTELLUNG EINES STAHLBAUTEILS
Title (fr)
PIÈCE EN ACIER FABRIQUÉE PAR FORMAGE À CHAUD D'UN PRODUIT PLAT EN ACIER, PRODUIT PLAT EN ACIER ET PROCÉDÉ DE FABRICATION D'UNE PIÈCE EN ACIER
Publication
Application
Priority
- EP 20193905 A 20200901
- EP 2021073630 W 20210826
Abstract (en)
[origin: WO2022048990A1] The invention provides a steel component which is optimally protected against corrosion and produced by hot-shaping a steel flat product, and also provides a method and a steel flat product which permit the practical production of a steel component of this nature. The steel component comprises a steel substrate which consists of 0.10 – 0.4 % C, 0.05 – 0.5 % Si, 0.5 – 3.0 % Mn, 0.01 – 0.2 % AI, optionally up to 1.0 % Cr, - optionally up to 0.2 % V, < 0.1 % P, < 0.05 % S, < 0.021 % N and optionally in each case one or more elements from the group "B, Ti, Nb, Ni, Cu, Mo, W" where 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 %, and as the remainder Fe and in total < 3 % impurities, and a metal protective coating formed on the steel substrate, which coating is made up of Si, Fe, optionally < 0.6 % Mg and as the remainder AI and < 2 % other constituents and of an alloy layer lying on the steel substrate, which alloy layer contains 35 - 90 % Fe and 5 3 % Si, an Al base layer lying on the alloy layer, which base layer contains 35 - 55 % Fe and < 3 % Si, and an oxide coating lying on the Al base layer and forming the external finish of the metal protective coating, which oxide layer consists of > 80 % oxides, the main portion of the oxides being aluminium oxide and there being present, in the oxide layer, additionally optionally hydroxides and/or magnesium oxide alone or as a mixture, and the remainder of the oxide layer not taken up by the oxides and optionally present hydroxides consisting of Si, AI and/or Mg in metal form (all % values are mass %).
IPC 8 full level
C21D 1/673 (2006.01); C21D 1/74 (2006.01); C21D 1/76 (2006.01); C21D 8/02 (2006.01); C22C 38/14 (2006.01); C22C 38/26 (2006.01); C22C 38/28 (2006.01); C22C 38/32 (2006.01); C23C 2/02 (2006.01); C23C 2/12 (2006.01); C23C 2/14 (2006.01)
CPC (source: EP US)
C21D 1/673 (2013.01 - EP); C21D 1/74 (2013.01 - EP); C21D 1/76 (2013.01 - EP); C21D 8/0278 (2013.01 - EP); C22C 38/14 (2013.01 - EP); C22C 38/26 (2013.01 - EP); C22C 38/28 (2013.01 - EP); C22C 38/32 (2013.01 - EP); C23C 2/0224 (2022.08 - EP US); C23C 2/12 (2013.01 - EP); C23C 2/18 (2013.01 - EP); C23C 28/32 (2013.01 - EP); C23C 28/321 (2013.01 - EP); C23C 28/345 (2013.01 - EP); C23C 30/00 (2013.01 - EP)
Citation (search report)
See references of WO 2022048990A1
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
Designated extension state (EPC)
BA ME
Designated validation state (EPC)
KH MA MD TN
DOCDB simple family (publication)
DOCDB simple family (application)
EP 2021073630 W 20210826; EP 21769115 A 20210826