Process for producing molybdenum and tungsten alloys containing

Details Process for producing molybdenum and tungsten alloys containing Process for producing molybdenum and tungsten alloys containing

1986-09-25

1987-06-02

Lechert, Jr., Stephen J.

Powder metallurgy processes

Powder metallurgy processes with heating or sintering

Metal and nonmetal in final product

419 14, 419 17, 419 54, 419 57, 419 58, 419 59, 419 60, 75245, 75248, B22F 100

Patent

active

046702164

ABSTRACT:
A three step process in which a metal alloy selected from a tungsten based alloy and molybdenum based alloys is provided to prevent the decarbonization of the alloys. The process involves a three step sintering process wherein the atmosphere during the initial heating step is a mixture of carbon monoxide and hydrogen, thereafter at a intermediate temperature range the atmosphere is hydrogen and a final heating step at a elevated temperature is employed and the atmosphere is a mixture of inert gas and a source of carbon.

REFERENCES:
patent: 2509838 (1950-05-01), Oswald
patent: 2793116 (1957-05-01), Cuthbert et al.
patent: 4108650 (1978-08-01), Fustier et al.
patent: 4225344 (1980-09-01), Fujimori et al.
patent: 4605599 (1986-08-01), Penrice et al.
patent: 4612162 (1986-09-01), Morgan et al.

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