Method for producing alloyed tungsten rods

Details Method for producing alloyed tungsten rods Method for producing alloyed tungsten rods

1989-08-28

1990-05-08

Lechert, Jr., Stephen J.

Powder metallurgy processes

Powder metallurgy processes with heating or sintering

Metal and nonmetal in final product

419 23, 419 28, 419 29, 419 38, B22F 324

Patent

active

049236733

ABSTRACT:
In a method for producing tungsten-alloyed rods, a particular tungsten electrodes for tungsten inert gas welding, tungsten plasma welding, tungsten plasma fusion cutting and the like, in which pulverulent tungsten with an admixed oxide additive is compacted, sintered, mechanically worked and submitted to a recrystallization treatment, to achieve a hitherto unobtained high lanthanum integration the pulverulent tungsten is alloyed with a highly pure relaxed lanthanum oxide additive of about 1.8 to 2.2% by weight with respect to the total weight the compacting is carried out with a multiphase pressure buildup and the sintering is carried out with a multiphase temperature buildup.

REFERENCES:
patent: 3169861 (1965-02-01), Ehringer
patent: 3927989 (1975-12-01), Koo
patent: 4229873 (1980-10-01), Bykhovsky et al.
patent: 4602956 (1986-07-01), Partlow et al.

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