초록 ▼

A rotary tool that includes an elongate tool body and a hard insert affixed to the tool body is disclosed. The hard insert includes a WC-cermet including tungsten carbide and about 5 wt. % to 19 wt. % Co--Ni--Fe-binder. The Co--Ni--Fe-binder is unique in that even when subjected to plastic deformati

A rotary tool that includes an elongate tool body and a hard insert affixed to the tool body is disclosed. The hard insert includes a WC-cermet including tungsten carbide and about 5 wt. % to 19 wt. % Co--Ni--Fe-binder. The Co--Ni--Fe-binder is unique in that even when subjected to plastic deformation, the binder substantially maintains its face centered cubic (fcc) crystal structure and avoids stress and/or strain induced transformations.

대표청구항 ▼

[ What is claimed is:] [1.] A rotary tool comprising:an elongate tool body having an axially forward end and an axially rearward end;a hard insert affixed to the tool body at the axially forward end thereof; andthe hard insert comprising a WC-cermet comprising tungsten carbide and about 5 wt. % to 1

[ What is claimed is:] [1.] A rotary tool comprising:an elongate tool body having an axially forward end and an axially rearward end;a hard insert affixed to the tool body at the axially forward end thereof; andthe hard insert comprising a WC-cermet comprising tungsten carbide and about 5 wt. % to 19 wt. % Co--Ni--Fe-binder comprising about 40 wt. % to 90 wt. % cobalt, about 4 wt. % to 36 wt. % nickel, about 4 wt. % to 36 wt. % iron, and a Ni:Fe ratio from about 1.5:1 to 1:1.5.