公开(公告)号：EP1520056A2

公开(公告)日：2005-04-06

申请号：EP03763783.2

申请日：2003-07-10

申请人： BOART LONGYEAR GMBH & CO. KG HARTMETALLWERKZEUGFABRIK

发明人： KONYASHIN, Igor ,  RIES, Bernd ,  COOPER, Roy

IPC分类号： C22C29/08 ,  C22C26/00

CPC分类号： C22C29/08 ,  B22F2005/001 ,  Y10T428/25

摘要： The invention relates to a hard metal made from WC for tools for the mechanical working of stone, concrete and asphalt in particular, with 5 to 25 wt. % of binder made from Co or Co and Ni and with a coercivity field strength of up to 30.0 kA/m or whereby the binder is made from at least 5 vol. % of nanoparticles with ordered phases of W, Co and/or C. The hard metal has a magnetic saturation (σ or 4πσ, each in units of microtesla cubic meters per kilogram) depending on the Co proportion (X) in wt. % of the hard metal in a range of σ = 0.11X to σ = 0.137X or 4πσ = 0.44πX to 4πσ = 0.548πX.