EP 4161720 A1 20230412 - STEEL MATERIAL FOR FORMING COMPONENTS USING ADDITIVE MANUFACTURING AND USE OF A STEEL MATERIAL OF THIS TYPE
Title (en)
STEEL MATERIAL FOR FORMING COMPONENTS USING ADDITIVE MANUFACTURING AND USE OF A STEEL MATERIAL OF THIS TYPE
Title (de)
STAHLMATERIAL ZUM FORMEN VON BAUTEILEN DURCH ADDITIVE FERTIGUNG UND VERWENDUNG EINES SOLCHEN STAHLMATERIALS
Title (fr)
MATÉRIAU À BASE D'ACIER CONÇU POUR FORMER DES PIÈCES PAR FABRICATION ADDITIVE ET UTILISATION DE CE MATÉRIAU À BASE D'ACIER
Publication
Application
Priority
- DE 102020115049 A 20200605
- EP 2021064837 W 20210602
Abstract (en)
[origin: WO2021245158A1] The invention relates to a steel material which allows for components to be formed with low residual stress via additive manufacturing without pre- or post-heating. The steel material consists of a steel with the following composition, in wt.%: C: 0.28 - 0.65 %, Co: < 10.0, Cr: 3.5 - 12.5 %, optionally Mo: 0.5 - 12.5 %, wherein the sum of the content of Cr and Mo is 4 - 16 %, the Ni equivalent Ni_eq calculated according to the formula Ni_eq [%] = 30 %C + %Ni + 0.5 %Mn from the C-content %C, the Ni-content %Ni, the Mn-content %Mn fulfills the condition (1) 10 % ≤ Ni eq ≤ 20 %, and alongside C, optionally respectively up to 9% Mn and up to 4.5% Ni are provided to fulfill condition (1), wherein the Cr equivalent Cr_eq calculated according to the formula Cr_eq [mass] = %Cr + %Mo + 1.5 %S + 0.5 %Nb + 2 %XX from the CR-content Cr%, the Mo-content Mo%, the Si-content Si%, the Nb-content %Nb and the sum %XX of the contents of at least one element of the group "Sc, Y, Ti, Zr, Hf, V, Ta" fulfills the condition (2) 4 % ≤ Cr_eq ≤ 16 %, and optionally respectively up to 2% Si, up to 2% Nb or at least one element from the group "Sc, Y, Ti, Zr, Hf, V, Ta" are provided to fulfill condition (2), wherein the total proportion of elements of this group is at most equal to the mass fraction of 2%, which Ti must not exceed if Ti is the only element selected from the group consisting of "Sc, Y, Ti, Zr, Hf, V, Ta", and wherein the rest of the steel consists of Fe and < 0.5 % impurities, including ≤ 0.025 % P and 50.025% S. The steel material is suited, in particular as a powder, for LPBF or LMD methods and as wire for the WAAM method.
IPC 8 full level
B22F 10/20 (2021.01); B22F 10/25 (2021.01); B22F 10/28 (2021.01); B33Y 70/00 (2015.01); C22C 33/02 (2006.01); C22C 38/00 (2006.01); C22C 38/22 (2006.01); C22C 38/24 (2006.01); C22C 38/26 (2006.01); C22C 38/28 (2006.01); C22C 38/30 (2006.01); C22C 38/34 (2006.01); C22C 38/44 (2006.01); C22C 38/46 (2006.01); C22C 38/48 (2006.01); C22C 38/50 (2006.01); C22C 38/52 (2006.01)
CPC (source: EP US)
B22F 10/28 (2021.01 - EP US); B23K 9/04 (2013.01 - EP US); B23K 26/342 (2015.10 - EP US); B33Y 70/00 (2014.12 - EP); C22C 33/0257 (2013.01 - EP US); C22C 38/005 (2013.01 - EP US); C22C 38/02 (2013.01 - EP US); C22C 38/04 (2013.01 - US); C22C 38/44 (2013.01 - EP US); C22C 38/46 (2013.01 - EP US); C22C 38/48 (2013.01 - EP US); C22C 38/50 (2013.01 - EP US); C22C 38/52 (2013.01 - EP US); C22C 38/58 (2013.01 - EP US); B22F 2005/002 (2013.01 - EP US); B23K 2103/04 (2018.07 - EP US); B33Y 70/00 (2014.12 - US); B33Y 80/00 (2014.12 - EP US); Y02P 10/25 (2015.11 - EP)
Citation (search report)
See references of WO 2021245158A1
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)
DE 102020115049 A1 20211209; EP 4161720 A1 20230412; US 2023220526 A1 20230713; WO 2021245158 A1 20211209
DOCDB simple family (application)
DE 102020115049 A 20200605; EP 2021064837 W 20210602; EP 21729569 A 20210602; US 202118007565 A 20210602