Gte Products Corporation

Gte Sylvania Incorporated

James Q Steigelman

Walter A Johnson

Preston B Kemp, Jr

Joseph J Cleveland

Richard N Kleiner

Geoffrey L Harris

Frank Rymas

Glenn A Shaffer, Deceased

By Irene Charland, Administrator Dbn Cta

Roger B Bargainnier

A process is disclosed for producing essentially spherical metallic powder particles. The process involves mechanically agglomerating a mixture comprising powders wherein the powders are selected from the group consisting of metals, metal alloys, metal-ceramic composites, ceramics, and wherein at least one of the powders is a relatively ductile and/or malleable metal. The resulting mechanically agglomerated powder particles are entrained in a carrier gas and passed through a high temperature zone at a temperture above the melting point of the lowest melting component of the mixture to melt at least about 50% by weight of the mechanically agglomerated particles and form essentially spherical powder particles of the melted portion, followed by resolidifying the resulting high temperature treated material.

Process for producing metallic powders

A flexible sheet of a top layer of nickel brazing alloy particles overcast on a tapecast base layer of tungsten carbide particles, the brazing alloy particles and carbide particles each dispersed in and supported by an organic binder matrix, when placed on a substrate dewaxed and heated to about 1100.degree. C., forms a braze infiltrated hardfacing coating of tungsten carbide particles in a braze alloy matrix, which coating is metallurgically bonded to and enhances the hardness and wear resistance of the coated substrate.

Flexible bilayered sheet, one layer of which contains abrasive particles

Sintered and unsintered articles of refractory metal carbide and cementing metal having thicknesses greater than those obtainable by tape casting a slurry of ingredients onto a substrate, and having a cross section of substantially uniform appearance, are described, as well as a laminating method for producing such articles, the method comprising; (1) pressing the top surface of one or more unsintered flexible tape cast sheets against a smooth rigid surface to achieve a top surface smoothness comparable to the bottom surface smoothness achieved by tape casting, and (2) forming a laminate of at least 3 unsintered flexible tape cast layers by bringing the respective smooth surfaces of the layers into mutual contact and pressing the layers together to achieve bonding.

Refractory metal carbide articles and laminating method for producing

Cemented carbide articles produced by tape casting a slurry of ingredients including organic resins and plasticizers, forming the cast tape into a desired shape and firing the tape, are improved by eliminating carbonaceous residue-forming ingredients from the organic portion of the slurry, resulting in reduced porosity of the fired article.

Cast cemented refractory metal carbides having improved sintered density

Growing community of inventors

Athens, PA, United States of America

James Q Steigelman