Method of making composite orifice for melting furnace

Details Method of making composite orifice for melting furnace Method of making composite orifice for melting furnace

1992-11-16

1994-12-27

Walsh, Donald P.

Powder metallurgy processes

Powder metallurgy processes with heating or sintering

Consolidation of powder prior to sintering

419 6, 419 28, 419 38, 419 44, B22F 300

Patent

active

053763297

ABSTRACT:
A method of making a composite orifice having a tungsten core which is diffusion bonded to a molybdenum shell. Tungsten and molybdenum powders in contact with each other in a mold are isostatically pressed to form a pressed bonded composite part. The pressed, unsintered tungsten core portion of the part is then machined to the desired dimensions. The pressed composite part is then sintered to form a diffusion bonded composite orifice. The pressed and sintered molybdenum shell portion of the orifice may then be machined to the desired dimensions.

REFERENCES:
patent: 3780418 (1973-12-01), Hurst
patent: 4017294 (1977-04-01), Sanford et al.
patent: 4061841 (1977-12-01), Sharma et al.
patent: 4063940 (1977-12-01), Dain et al.
patent: 4612162 (1988-02-01), Morgan et al.
patent: 4726927 (1988-02-01), Morgan et al.
Goetzel, C. G., "Treatise on Powder Metallurgy" p. 4. Interscience Publishers Inc. (1949).

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