Kennametal Inc.

Shivanand I Majagi

Robert W Britzke

Jimmy Wayne Eason

Jonathan Bitler

Debangshu Banerjee

Anirudda S Marathe

Ronald C Keating

Daniel W Nelson

A blade, which is useful on a tool that impinges earth strata, that has a blade body with a leading surface. The blade body has a first portion defining at least a part of the leading surface and a second portion. The first portion is made of a first material composition and the second portion is made of a second material composition.

Fixed cutter bit and blade for a fixed cutter bit and methods for making the same

A cutting bit body that is a part of a cutting bit that includes a hard insert that is affixed to the cutting bit body and wherein the cutting bit impinges earth strata. The cutting bit body is an elongate powder metallurgical body member. A method for making a powder metallurgical cutting bit body that includes the steps of: providing a powder mixture; pressing the powder mixture into a green cutting bit body compact having a partial density; and consolidating the green body to form the powder metallurgical cutting bit body.

Cutting bit body and method for making the same

A tough wear-resistant hard member that includes a hard composite member and a support that has a surface area adjacent to the hard composite member wherein the hard composite member is affixed to the support over at least a portion of the adjacent surface area of the support. The hard composite member includes a plurality of discrete hard constituents distributed in the hard composite member wherein each one of the discrete hard constituents is of a size so as to have a surface area between about 0.001 square inches and about 16 square inches. The hard composite member further contains a matrix powder that includes particles wherein substantially all of the hard particles have a size smaller than the size of the hard constituents. The hard composite member further includes an infiltrant alloy having a melting point between about 500 degrees Centigrade and about 1400 degrees Centigrade wherein the infiltrant alloy is infiltrated under heat into a mixture of the discrete hard constituents and the matrix powder so as to not effectively degrade the hard constituents upon infiltration, whereby the hard constituents and the matrix powder and the infiltrant alloy are bonded together to form the hard composite member. The support is made of a material that is bondable with the infiltrant alloy whereby the infiltrant alloy forms a joint at the joinder of the support and the hard composite member.

Wear-resistant member having a hard composite comprising hard constituents held in an infiltrant matrix

A multiple-region hardmetal tool piece. The tool piece includes a hardmetal body including a hard particle component and a binder; an additional body, the additional body including a hardmetal body having a hard particle component and a binder; a metal body or a ceramic body; a substantially discontinuous gradient-free boundary layer between the hardmetal body and the additional body; and a mating surface between the hardmetal body and the additional body. In the preferred embodiment, the hard particle components are a carbide, such as tungsten carbide. In the preferred embodiment, the mating surface includes a male portion on one of the bodies and a corresponding female portion on the other of the bodies. The mating surface is symmetrical or asymmetrical and, in the preferred embodiment, the mating surface is axially symmetrical, such as a dimple. The mating surface may further including both micro and macro mating features.

Graded composite hardmetals

A product having a chromium carbide based cemented carbide composition with a nickel and/or chromium based binder is disclosed. It possesses excellent corrosion resistance in combination with good strength and hardness/abrasion resistance. The average chromium carbide grain size is less than 10 &mgr;m.

Corrosion and wear resistant cemented carbide

A hard alloy material comprising tungsten carbide in an amount of 50 to 80 weight percent of the material, titanium carbide in an amount of at least about 10 weight percent, and a binder material of cobalt and nickel. Though tungsten carbide based, the thermal conductivity of the material of the invention is between 10 and 20 Watt/m&deg; K. In other aspects of the invention, molybdenum and chromium are included to further lower the thermal conductivity of the material. In yet another aspect of the invention, one or more nitrides or carbonitrides of titanium and/or zirconium are included in the material.

Low thermal conductivity hard metal

A superhard filler hardmetal having a superhard material filler, binder metal or matrix and in some instances at least a first hard component is disclosed. The superhard filler hardmetal has a porosity rating of substantially A06, B00, C00 or better and may be essentially pore free, i.e., A00, B00, C00. The superhard filler hardmetal is formed by mechanically mixing a superhard material, in some instances at least a first hard component and a binder metal or matrix precursor, shaping the mixture into a green body and consolidating the green body at a preselected temperature, superatmospheric pressure and time at temperature and time at superatmospheric pressure sufficient to form the superhard filler hardmetal. The consolidation preferably occurs without the formation of a liquid in the body and at least a portion of the time at superatmospheric pressure is at the preselected temperature. Diamond filler and boron nitride filler are examples of superhard materials usable as filler. The diamond filler may be coated to prevent its degradation during consolidation and use. Boron nitride filler optionally may be coated.

Growing community of inventors

Rogers, AR, United States of America

Shivanand I Majagi