Gte Laboratories Incorporated

Gte Service Corporation

J Gary Baldoni, Ii

Vinod K Sarin

Sergej-Tomislav V Buljan

Helmut Lingertat

Sergei-Tomislav V Buljan

Charles D'Angelo

This invention relates to abrasion resistant materials and to articles of manufacture made therefrom. More particularly, it is concerned with abrasion resistant materials comprising boron doped TiC or boron doped VC distributed in a matrix containing silicon nitride and with articles made therefrom.

Abrasion resistant articles and composition utilizing a boron-doped

A steel roughing grade coated cemented carbide cutting tool comprises WC grains equal to or less than 70 w/o of the tool substrate, from about 5 to about 10 w/o of a cobalt bonding phase and the remainder being metal carbide grains selected from the group TiC, TaC, NbC, HfC and combinations thereof. The average WC grain size is from about 0.9 to about 1.3 microns and less than 10% of the WC grains have a size less than 0.5 microns. The coated cemented carbide tool is coated with an adherent refractory coating layer. The coated cemented carbide cutting tool can be used to machine steel at rough and heavy rough cutting conditions.

Coated cemented carbide tool for steel roughing applications and methods

A coated insert for such drilling tool bits as mine tool roof bits or masonry drill bits. A hard, fracture resistant substrate is coated with one or more thin adherent layers of refractory coating material. The material of each layer is a carbide, nitride, or carbonitride of titanium, hafnium, vanadium, tantalum, or niobium, or an oxide of aluminum or zirconium or a mixture or solid solution of these compounds. Methods for drilling holes in a mine roof or other hard materials are also disclosed.

Insert for a drilling tool bit and a method of drilling therewith

The present invention is directed to a triple coated cemented hard metal carbide product in which a cemented metal carbide substrate is coated with, first, a metal carbide coating to promote coating adherence to the substrate, secondly, a metal nitride or carbonitride coating to promote crater wear resistance and, thirdly, a metal carbide outer layer to promote flank flank wear resistance in order to protect the cemented metal carbide substrate from corrosive atmosphere and abrasion due to frictional flank wear.

Growing community of inventors

Walpole, MA, United States of America

J Gary Baldoni, Ii