Powder metallurgy processes – Powder metallurgy processes with heating or sintering – Heat and pressure simultaneously to effect sintering
Patent
1991-08-13
1992-10-13
Lechert, Jr., Stephen J.
Powder metallurgy processes
Powder metallurgy processes with heating or sintering
Heat and pressure simultaneously to effect sintering
264125, 264332, B22F 300
Patent
active
051548828
ABSTRACT:
The invention includes an apparatus and method for hot isostatic compaction of compactible material in a heated and pressurized environment within a pressure vessel, having a compaction container which can be hermetically sealed over a load, and which can transmit pressure from the pressure vessel to the load sealed in the container, a compaction die which can be hermetically sealed within the container, the die having an interior wall area which defines within the die an internal cavity having a width measured along a first axis, the die interior wall area extending along a second axis transverse to the first axis to generally define the height of the die cavity, the die having a wall thickness measured along the first axis, and a punch arrangement for applying compacting force to the compactible material and having a width essentially equal to the die cavity width such that when the punch arrangement is loaded oriented along the first axis within the die cavity, respective ends of the punch arrangement contact the die interior wall area, the die wall thickness being selected according to the separation between portions of the punch arrangement, such that pressure on the container will force the punch arrangement to travel along the second axis to compact the loaded compactible material charge along the second axis.
REFERENCES:
patent: 4747999 (1988-05-01), Hasselstrom
patent: 5063022 (1991-11-01), Zick
"Isostatic Compacting", MPIF 1977, Powder Metal Equipment Manual, Chapter 9.
Industrial Materials Technology
Lechert Jr. Stephen J.
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