Carpenter Technology Corporation

Robert E Carnes

Gregory J Del Corso

David Esposito

David L Strobel

Edward F Holland

William J Burns, Ii

David T Marlowe

A method of manufacturing a flat form from blended metallic powder including a major constituent by weight having a high melting point and a minor constituent by weiht having a substantially lower melting point includes selection of the powder to provide continuous and reproducible compacted flat forms. Powder is selected on the basis of compressibility and flowability. The selected powder is compacted to a flat green form and then liquid phase sintered. The flat form may be stacked to provide a flat article of a desired thickness which will result in a monolithic or composite cross section when subsequently sintered. Liquid phase sintering is carried out in a manner designed to avoid undesirable embrittlement and to provide a uniform microstructure in the fully consolidated article. The process is especially useful in the production of tungsten heavy alloy plate.

Method of manufacturing flat forms from metal powder and product formed

A powder metallurgy consolidation process and apparatus for carrying out said process produces integral metal bodies by heating metal powder of a predetermined composition to a temperature sufficient to cause solid state interparticle bonding, while simultaneously maintaining a reactive fluid in contact with the metal powder. The metal powder is compacted to a density greater than 90% of the full theoretical density of the composition after the reactive fluid has been removed. The reactive fluid is selected to modify the powder particle surface chemistry in order to improve bondability and to obtain other properties as desired. Metal bodies which have been consolidated by the process are sufficiently dense to be mechanically hot worked and exhibit exceptionally low retained gas content.

Process and apparatus to simultaneously consolidate and reduce metal

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Reading, PA, United States of America

Robert E Carnes