Process for reducing the disparities in mechanical values of tun

Details Process for reducing the disparities in mechanical values of tun Process for reducing the disparities in mechanical values of tun

1988-05-27

1990-06-05

Lechert, Jr., Stephen J.

Powder metallurgy processes

Powder metallurgy processes with heating or sintering

Powder shape or size characteristics

419 31, 419 32, 419 62, 75248, B22F 100

Patent

active

049312529

ABSTRACT:
A process for reducing disparities of mechanical properties in tungsten-nickel-iron alloys containing in % by weight 85 to 99% of tunsten, 1 to 10% of iron, the alloys being obtained from tungsten, nickel and iron powders which have the same or different grain diameter, shape and size distribution, which entails simultaneously adding an effective amount of each of cobalt and manganese powders to tungsten powder or to a mixture of tungsten, nickel and iron powders.

REFERENCES:
patent: 3888636 (1975-06-01), Sczerenie et al.
patent: 3979209 (1976-09-01), Snyder et al.
patent: 3979234 (1976-09-01), Northcutt, Jr. et al.
patent: 3988118 (1976-10-01), Grierson et al.
patent: 4762559 (1988-08-01), Penrice et al.

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