Patent · US Expired

Rotary earth strata penetrating tool with a cermet insert having a co-ni-fe-binder

US5992546A · kind A · utility

20Cited by

26References

21Claims

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	Nov 30, 1999
Priority date	—
Expiry date	Aug 27, 2017

Classification

Technology area (CPC E)Fixed Constructions
CPC primaryE21B10/52
WIPO fieldCivil engineering
WIPO sectorOther fields

Abstract

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.

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