C - Chemistry – Metallurgy – 22 – C
Patent
C - Chemistry, Metallurgy
22
C
C22C 29/02 (2006.01) C22C 29/06 (2006.01) E21C 35/183 (2006.01) E21C 35/18 (2006.01)
Patent
CA 2302302
A pick-style tool that includes an elongate tool body (22) with an axially forward end (26) and an axially rearward end (24), and a hard insert (28) affixed to the tool body at the axially forward end is disclosed. The hard insert comprises a WC-cermet comprising tungsten carbide and about 5 wt.% to 27 wt.% Co-Ni-Fe-binder. The Co-Ni-Fe-binder is unique in that even when subjected to plastic deformation, the binder sustantially maintains its face centered cubic (fcc) crystal structure and avoids stress and/or strain induced transformations.
L'invention concerne un outil du type pic comprenant un corps (22) d'outil oblong présentant une extrémité avant (26) axialement et une extrémité arrière (24) axialement, ainsi qu'une pièce rapportée dure (28) fixée au corps de l'outil au niveau de l'extrémité avant axialement. La pièce rapportée dure comprend un WC-cermet renfernant du carbure de tungstène et environ 5 à 27 % en poids d'un liant Co-Ni-Fe. Le liant Co-Ni-Fe est unique en ce que même lorsqu'il est soumis à une déformation plastique, le liant conserve sensiblement sa structure cristalline cubique à faces centrées et il évite les transformations induites par efforts et/ou contraintes.
Heinrich Hans-Wilm
Schleinkofer Uwe
Schmidt Dieter
Wolf Manfred
Kennametal Inc.
Smart & Biggar
LandOfFree
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