Stock material or miscellaneous articles – All metal or with adjacent metals – Having metal particles
Patent
1987-10-26
1989-05-16
Lechert, Jr., Stephen J.
Stock material or miscellaneous articles
All metal or with adjacent metals
Having metal particles
428610, 419 6, 419 23, G22F 300
Patent
active
048308226
ABSTRACT:
A method is disclosed for providing an article having within its integral body a plurality of sections of varying density. The method involves successively loading a die with each of a plurality of powders, each powder having a specific composition and particle size and each powder being loaded in a predetermined amount to result in each section of the final article having a characteristic density, compacting the powders to produce a preformed article, and sintering the preformed article at a sufficient temperature for a sufficient time to produce the final article.
A method is disclosed in which the powders are metal.
A metal article is disclosed which is produced the above methods, with the preferred metals being tungsten powder and molybdenum powder.
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patent: 2267918 (1941-12-01), Hildabolt
patent: 2464517 (1949-03-01), Kurtz
patent: 3320058 (1967-05-01), Krock et al.
patent: 3373003 (1968-03-01), Schreiner
patent: 3766769 (1973-10-01), Fuchs et al.
patent: 4357393 (1982-11-01), Tsuda et al.
Castle Donald R.
GTE Products Corporation
Lechert Jr. Stephen J.
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