EP 1630242 B1 20081001 - Cemented carbide, coated cemented carbide member and production processes of the same
Title (en)
Cemented carbide, coated cemented carbide member and production processes of the same
Title (de)
Hartmetall, beschichtetes Hartmetallteil und Verfahren zu dessen Herstellung
Title (fr)
Carbure cementé, pièce en carbure cementé revêtue et son procédé de fabrication
Publication
Application
Priority
EP 04090325 A 20040824
Abstract (en)
[origin: EP1630242A1] A cemented carbide comprises a binder phase consisting essentially of an iron family metal, a first hard phase consisting essentially of WC having a hexagonal crystal structure, and a second hard phase consisting essentially of one or more types of a compound of a metal or metals of group 4, 5 or 6 of the periodic table having an NaCl-type cubic crystal structure. The cemented carbide is formed by a surface region with a thickness of 2 to 50 µm consisting of the binder phase and the first hard phase, and an inner region present underneath the surface region consisting of the binder phase, the first hard phase and the second hard phase. A ratio of an average grain size of the first hard phase in the surface region to an average grain size of the first hard phase in the inner region is 1 or less, and a ratio of an area of the binder phase in the surface region to an area of the binder phase in the inner region is greater than 1.
IPC 8 full level
C22C 29/08 (2006.01); B22F 3/10 (2006.01)
CPC (source: EP)
C22C 29/08 (2013.01); B22F 2999/00 (2013.01)
Designated contracting state (EPC)
DE ES FR GB IT SE
DOCDB simple family (publication)
EP 1630242 A1 20060301; EP 1630242 B1 20081001; DE 04090325 T1 20060622; DE 602004016845 D1 20081113; ES 2255896 T1 20060716; ES 2255896 T3 20090416
DOCDB simple family (application)
EP 04090325 A 20040824; DE 04090325 T 20040824; DE 602004016845 T 20040824; ES 04090325 T 20040824