EP 4018006 A1 20220629 - TOOL STEEL FOR COLD-WORKING AND HIGH-SPEED APPLICATIONS
Title (en)
TOOL STEEL FOR COLD-WORKING AND HIGH-SPEED APPLICATIONS
Title (de)
WERKZEUGSTAHL FÜR KALTARBEITS- UND SCHNELLARBEITSANWENDUNGEN
Title (fr)
ACIER À OUTILS POUR APPLICATIONS DE TRAVAIL À FROID ET À GRANDE VITESSE
Publication
Application
Priority
- DE 102019122638 A 20190822
- EP 2020073652 W 20200824
Abstract (en)
[origin: WO2021032893A1] The invention relates to a method for producing a tool steel for cold-working and hot-working applications, in which a steel material consisting of the following alloy elements: (all figures in wt%): carbon = 1.50 to 2.50; silicon = 0.25 to 1.0; Mn = 0.10 to 1.0; Cr = 4.0 to 7; W = 12 to 16; Mo = 1.0 to 5.0; V = 3.0 to 7.0; Co = 6.0 to 8.0; remainder iron and unavoidable impurities resulting from melting, is melted and processed into a powder by atomising, and the powder is then subjected to hot isostatic pressing or three-dimensional compression, and the hot isostatic powder is then mechanically processed if necessary. A heat treatment follows, the heat treatment being carried out such that the material is first heated to a hardening temperature of 1170 °C - 1190 °C in the core, then held at this hardening temperature for 60 to 300 seconds, preferably 100 to 200 seconds, and then cooled at a cooling speed of λ <= 3 to a temperature <= 50 °C, preferably <= 30 °C, for the purposes of hardening, and then drawn, the drawing treatment comprising at least two cycles in which the material is heated to a temperature of 400 °C to 600 °C and held at this temperature of 400 °C to 600 °C for at least two hours, and then cooled at a cooling speed of < 1 K/s to a temperature <= 50 °C, preferably <= 30 °C. The invention also relates to a steel material produced by this method and to the use thereof.
IPC 8 full level
B22F 3/15 (2006.01); B22F 9/00 (2006.01); C21D 1/25 (2006.01); C21D 1/74 (2006.01); C21D 1/76 (2006.01); C21D 1/773 (2006.01); C21D 1/78 (2006.01); C21D 6/02 (2006.01); C21D 8/00 (2006.01); C22C 33/02 (2006.01)
CPC (source: EP)
B22F 3/15 (2013.01); B22F 3/24 (2013.01); C21D 1/25 (2013.01); C21D 1/74 (2013.01); C21D 1/76 (2013.01); C21D 1/773 (2013.01); C21D 1/785 (2013.01); C21D 6/02 (2013.01); C21D 8/005 (2013.01); C22C 33/0278 (2013.01); B22F 2998/10 (2013.01)
Citation (search report)
See references of WO 2021032893A1
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)
WO 2021032893 A1 20210225; DE 102019122638 A1 20210225; EP 4018006 A1 20220629
DOCDB simple family (application)
EP 2020073652 W 20200824; DE 102019122638 A 20190822; EP 20761235 A 20200824