Patent · US Expired

Pick-style tool with a cermet insert having a Co-Ni-Fe-binder

US6170917A · kind A · utility

103Cited by

28References

50Claims

0Family size

Assignee

KENNAMETAL INC. · US

Inventors

Hans-Wilm Heinrich · Bayreuth, DE
Manfred Wolf · Wertheim, DE
Dieter Schmidt · Bayreuth, DE
Uwe Schleinkofer · Latrobe, US

Key dates

Filing date	Aug 27, 1997
Grant date	Jan 9, 2001
Priority date	—
Expiry date	Aug 27, 2017

Classification

Technology area (CPC E)Fixed Constructions
CPC primaryE21C35/188
WIPO fieldCivil engineering
WIPO sectorOther fields

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.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.