Pick-style tool with a cermet insert having a Co-Ni-Fe-binder
AssigneeKennametal Inc.
InventorsHans-Wilm Heinrich, Manfred Wolf, Dieter Schmidt, Uwe Schleinkofer
Life of this patent
Estimating the term…
Abstract
A pick-style tool that includes an elongate tool body with an axially forward end and an axially rearward end, and a hard insert 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 substantially maintains its face centered cubic (fcc) crystal structure and avoids stress and/or strain induced transformations.
Claims50
A pick-style 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;
- and
- the hard insert comprising a WC-cermet comprising tungsten carbide and about 5 wt. % to 27 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;
- a Ni:Fe ratio from about 1.5:1 to 1:1.5;
- and a face centered cubic (fcc) structure that exhibits substantially no stress and strain induced phase transformations.
A hard insert for use in a pick-style tool having an elongate tool body with an axially forward end wherein the hard insert is affixed to the tool body at the axially forward end thereof, the hard insert comprising a WC-cermet comprising tungsten carbide and about 5 wt. % to 27 wt. % of a 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;
- a Ni:Fe ratio from about 1.5:1 to 1:1.5;
- and a face centered cubic structure (fcc) that exhibits substantially no stress and strain induced phase transformations.
A rotatable cutting tool comprising:
- an elongate tool body having an axially forward end;
- a hard insert affixed to the tool body at the axially forward end thereof;
- and
- the hard insert comprising a WC-cermet consisting essentially of about 1 μm to 30 μm tungsten carbide and about 5 wt. % to 27 wt. % solid solution face centered cubic (fcc) 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;
- a Ni:Fe ratio from about 1.5:1 to 1:1.5;
- and the solid solution face centered cubic (fcc) structure exhibits substantially no stress and strain induced phase transformations.
A pick-style 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;
- and
- the hard insert comprising a WC-cermet comprising tungsten carbide and about 5 wt. % to 9.5 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;
- a Ni:Fe ratio from about 1.5:1 to 1:1.5;
- and a face centered cubic (fcc) structure that exhibits substantially no stress and strain induced phase transformations.
A hard insert for use in a pick-style tool having an elongate tool body with an axially forward end wherein the hard insert is affixed to the tool body at the axially forward end thereof, the hard insert comprising a WC-cermet comprising tungsten carbide and about 5 wt. % to 9.5 wt. % of a 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;
- a Ni:Fe ratio from about 1.5:1 to 1:1.5;
- and a face centered cubic (fcc) structure that exhibits substantially no stress and strain induced phase transformations.
A rotatable cutting tool comprising:
- an elongate tool body having an axially forward end;
- a hard insert affixed to the tool body at the axially forward end thereof;
- and
- the hard insert comprising a WC-cermet consisting essentially of about 1 μm to 30 μm tungsten carbide and about 5 wt. % to 9.5 wt. % solid solution face centered cubic (fcc) 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;
- a Ni:Fe ratio from about 1.5:1 to 1:1.5;
- and the face centered cubic (fcc) structure exhibits substantially no stress and strain induced phase transformations.
Dependencies are inferred from the claim text.