Repeated sintering of tungsten based heavy alloys for improved i

Details Repeated sintering of tungsten based heavy alloys for improved i Repeated sintering of tungsten based heavy alloys for improved i

1993-04-23

1994-03-15

Roy, Upendra

Metal treatment

Process of modifying or maintaining internal physical...

Treating consolidated metal powder, per se

75248, 148673, 420430, C22C 2700

Patent

active

052942694

ABSTRACT:
A method for heat-treatment of tungsten based alloys, capable of improving impact toughness while keeping tensile strength and elongation. The method comprises maintaining a sintered tungsten based alloy consisting of 86 to 99 weight % tungsten and the balance at least one selected from a group consisting of nickel, iron, copper, cobalt and molybdenum, at a temperature ranged from 950.degree. to 1,350.degree. C. for a maintenance time of one minute to 24 hours, quenching the sintered alloy in water or in oil, and repeating the maintaining and quenching steps.

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patent: 4851042 (1989-07-01), Bose et al.
patent: 5064462 (1991-11-01), Mullendore et al.
Churn et al. Powder Metallurgy 1979, Nr. 4, pp. 175-178.

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