EP 4127258 A1 20230208 - COBALT-FREE TUNGSTEN CARBIDE-BASED HARD-METAL MATERIAL
Title (en)
COBALT-FREE TUNGSTEN CARBIDE-BASED HARD-METAL MATERIAL
Title (de)
KOBALTFREIER WOLFRAMKARBID-BASIERTER HARTMETALLWERKSTOFF
Title (fr)
MATÉRIAU DE MÉTAL DUR À BASE DE CARBURE DE TUNGSTÈNE EXEMPT DE COBALT
Publication
Application
Priority
- EP 20165742 A 20200326
- EP 2021056762 W 20210317
Abstract (en)
[origin: WO2021191009A1] Disclosed is a cobalt-free tungsten carbide-based hard-metal material comprising 70-97 wt% of hard-material particles which are at least predominantly formed by tungsten carbide and 3-30 wt% of a metallic binder which is an iron-nickel-based alloy comprising at least iron, nickel and chromium with a ratio of Fe to (Ni + Fe) of 0.70≤ Fe/(Fe + Ni) ≤ 0.95; a Cr content of 0.5 wt% ≤ Cr/(Fe + Ni + Cr) and (i) for the range 0.7 ≤ Fe/(Fe + Ni) ≤ 0.83: Cr/(Fe + Ni + Cr) ≤ (- 0.625 * (Fe/(Fe + Ni)) +3.2688) wt%; (ii) for the range 0.83 ≤ Fe/(Fe + Ni) ≤ 0.85: Cr/(Fe + Ni + Cr) ≤ (- 27.5 * (Fe/(Fe + Ni)) + 25.575) wt% and (iii) for the range 0.85 ≤ Fe/(Fe + Ni) ≤ 0.95: Cr/(Fe + Ni + Cr) ≤ 2.2 wt%; optionally with an Mo content relative to (Fe + Ni + Cr) of 0 wt% ≤ Mo/(Fe + Ni + Cr) ≤ 10 wt%; optionally with a V content relative to (Fe + Ni + Cr) of 0 wt% ≤ V/(Fe + Ni + Cr) ≤ 2 wt%; and unavoidable impurities up to a total of not more than 1 wt% of the hard-metal material.
IPC 8 full level
C22C 29/06 (2006.01); C22C 1/05 (2006.01); C22C 29/08 (2006.01); C22C 38/00 (2006.01)
CPC (source: EP US)
C22C 29/005 (2013.01 - US); C22C 29/067 (2013.01 - EP); C22C 29/08 (2013.01 - EP US); C22C 38/00 (2013.01 - EP); C22C 38/44 (2013.01 - US); C22C 38/46 (2013.01 - US); C22C 1/051 (2013.01 - EP)
Citation (search report)
See references of WO 2021191009A1
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)
EP 3885459 A1 20210929; CN 115349023 A 20221115; CN 115349023 B 20240604; EP 4127258 A1 20230208; JP 2023518477 A 20230501; JP 7490075 B2 20240524; US 2023151461 A1 20230518; WO 2021191009 A1 20210930
DOCDB simple family (application)
EP 20165742 A 20200326; CN 202180023942 A 20210317; EP 2021056762 W 20210317; EP 21711586 A 20210317; JP 2022556637 A 20210317; US 202117913626 A 20210317