Method for producing high density refractory metal warhead liner

Details Method for producing high density refractory metal warhead liner Method for producing high density refractory metal warhead liner

1994-07-29

1996-06-04

Walsh, Donald P.

Powder metallurgy processes

Powder metallurgy processes with heating or sintering

Post sintering operation

419 38, 419 42, 419 48, 427446, 4272481, B22F 316

Patent

active

055230482

ABSTRACT:
A process for producing high density refractory metal warhead liners from near net shape blanks. A shaped mold is filled with pure or solid solution molybdenum or tungsten powders. The powders may be isostatically pressed and sintered to form a near net shape blank. A hot isostatic press may be used in combination with these steps or by itself to form the near net shape blank. The hot isostatic press densifies the near net shape blank to at least 90% of theoretical density. Where wrought properties are desired, a final forging step is performed. Alternatively, a process such as vacuum plasma spraying may be used to form the near net shape blank. A hot isostatic press densifies the near net shape blank. A final machining step achieves a finished refractory metal warhead liner.

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patent: 4981512 (1991-01-01), Kapoor
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patent: 5166471 (1992-11-01), Maselli et al.
patent: 5227576 (1993-07-01), Howard
patent: 5251530 (1993-10-01), Kaeser

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