High toughness tungsten based heavy alloy containing La and Ca.

Details High toughness tungsten based heavy alloy containing La and Ca. High toughness tungsten based heavy alloy containing La and Ca.

1992-06-09

1994-04-26

Roy, Upendra

Metal treatment

Process of modifying or maintaining internal physical...

Heating or cooling of solid metal

420430, B22F 100, C22C 2700

Patent

active

053063643

ABSTRACT:
A tungsten based heavy alloy having a W--Ni--Fe based composition containing traces of lanthanum or calcium, thereby capable of exhibiting high toughness, irrespective of the content of impurities such as phosphorous and sulfur contained therein, the cooling rate after the sintering treatment and the re-heating treatment. The present invention provides a method for making the high toughness tungsten based heavy alloy. The tungsten based heavy alloy of the present invention is useful to manufacture warheads for breaking armor plates, which require high toughness.

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patent: 4784690 (1988-11-01), Mullendore
patent: 4990195 (1991-02-01), Spencer et al.
patent: 5028756 (1991-07-01), Ezaki et al.

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