Method and mold for producing round rods by powder metallurgy

Details Method and mold for producing round rods by powder metallurgy Method and mold for producing round rods by powder metallurgy

1974-03-07

1976-12-07

Hunt, Brooks H.

Specialized metallurgical processes, compositions for use therei

Compositions

Consolidated metal powder compositions

75208R, 75221, 75223, 219145, B22F 300, B22F 310

Patent

active

039960471

ABSTRACT:
Dense round rods are obtained by placing an uncompacted particle mass into a mold containing a cavity of a predetermined geometry. The particle mass is subjected to a heating schedule wherein entrapped gases are permitted to pass off during an initial period of the schedule and during a second period of the schedule at least 75% liquid phase is formed, whereby surface tension forces cause the particle mass top portion to attain a hemispherical shape. The heated mass is permitted to cool and a round product is obtained.

REFERENCES:
patent: 2155651 (1939-04-01), Goetzel
patent: 2213523 (1940-09-01), Jones et al.
patent: 2287251 (1942-06-01), Jones
patent: 3183086 (1965-05-01), Kurtz et al.
patent: 3293006 (1966-12-01), Bartz
patent: 3301671 (1967-01-01), Storchheim
patent: 3356495 (1967-12-01), Zima et al.
patent: 3573903 (1971-04-01), Delgrosso
patent: 3645728 (1972-02-01), Hrinevich, Jr. et al.
patent: 3860420 (1975-01-01), Nayar

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