EP 3801950 A1 20210414 - METHOD FOR PRODUCING AN OBJECT FROM A HOT WORK STEEL
Title (en)
METHOD FOR PRODUCING AN OBJECT FROM A HOT WORK STEEL
Title (de)
VERFAHREN ZUM HERSTELLEN EINES GEGENSTANDES AUS EINEM WARMARBEITSSTAHL
Title (fr)
PROCÉDÉ DE FABRICATION D'UN OBJET EN ACIER POUR TRAVAIL À CHAUD
Publication
Application
Priority
- DE 102018113600 A 20180607
- EP 2019064381 W 20190603
Abstract (en)
[origin: WO2019233962A1] The present invention relates to a method for producing an object from a hot work steel, wherein a hot work steel alloy, in particular a hot work steel alloy with a carbon content of more than 0.35 wt %, is melted, wherein the melting occurs in an electric arc furnace with subsequent secondary metallurgy; the molten metal is cast in an ingot casting process and optionally remelted, and then the molten metal is atomized to create a powder, wherein the obtained powder is sized. The method is characterised in that, in a subsequent step in an additive manufacturing process for producing the object, energy is applied to the powder and the powder is selectively fused, a powder bed process being used, in which the powder is selectively fused and combined with previously fused layers, the working chamber being preheated to a working chamber temperature and the powder being preheated, the powder being heated to temperatures between 200 and 450°C before it is selectively fused, and the object thus obtained undergoes subsequent heat treatment, said heat treatment consisting of at least one hardening step and at least one or more annealing steps.
IPC 8 full level
B22F 1/142 (2022.01); B22F 3/105 (2006.01); B22F 9/08 (2006.01); B23K 26/342 (2014.01); B33Y 40/00 (2020.01); B33Y 70/00 (2020.01); B33Y 80/00 (2015.01); C22C 38/02 (2006.01); C22C 38/04 (2006.01); C22C 38/18 (2006.01); C22C 38/22 (2006.01); C22C 38/24 (2006.01)
CPC (source: EP US)
B22F 1/142 (2022.01 - EP US); B22F 9/082 (2013.01 - EP US); B22F 10/28 (2021.01 - EP US); B22F 10/32 (2021.01 - EP US); B22F 10/368 (2021.01 - EP US); B22F 12/17 (2021.01 - EP US); B33Y 40/00 (2014.12 - EP US); B33Y 40/10 (2020.01 - EP US); B33Y 70/00 (2014.12 - EP US); B33Y 80/00 (2014.12 - EP); C22C 38/02 (2013.01 - EP); C22C 38/04 (2013.01 - EP); C22C 38/18 (2013.01 - EP); C22C 38/22 (2013.01 - EP); C22C 38/24 (2013.01 - EP); B22F 2009/0824 (2013.01 - EP); B22F 2009/0848 (2013.01 - EP); B22F 2009/0876 (2013.01 - EP); B22F 2202/07 (2013.01 - EP); B22F 2999/00 (2013.01 - EP); Y02P 10/25 (2015.11 - EP)
Citation (search report)
See references of WO 2019233962A1
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
DOCDB simple family (publication)
DE 102018113600 A1 20191212; EP 3801950 A1 20210414; WO 2019233962 A1 20191212
DOCDB simple family (application)
DE 102018113600 A 20180607; EP 19729227 A 20190603; EP 2019064381 W 20190603