Elongated tungsten heavy metal aritcle and method for producing

Details Elongated tungsten heavy metal aritcle and method for producing Elongated tungsten heavy metal aritcle and method for producing

1987-02-17

1988-06-07

Lechert, Jr., Stephen J.

Specialized metallurgical processes, compositions for use therei

Compositions

Consolidated metal powder compositions

419 23, 419 28, 419 38, 419 69, 102501, H01H 102

Patent

active

047494107

ABSTRACT:
An article of tungsten heavy alloy material is disclosed, the article having essentially elongated tungsten grains, the alloy material comprising tungsten, nickel, and iron, the elongated tungsten grains having a length to diameter ratio of at least about 2 to 1.
A method is disclosed for producing the above article which involves rolling a pressed and sintered body of tungsten heavy alloy material comprising tungsten, iron, and nickel in a tandem rolling mill having a succession of roll stands, each stand consisting essentially of three rolls positioned at about 120.degree. to each other so that the gap between the rolls is a triangle, each stand being rotated about 180.degree. with respect to the adjacent roll stands, the rolling being done at a sufficient temperature to produce the article which has essentially elongated tungsten grains.

REFERENCES:
patent: 3600924 (1971-08-01), Martin
patent: 3979209 (1976-09-01), Snyder
patent: 3988118 (1976-10-01), Grierson et al.
patent: 4090875 (1978-05-01), Ludwig
patent: 4112197 (1978-09-01), Metz
patent: 4229961 (1980-10-01), Vydrin et al.
patent: 4443249 (1984-04-01), Weber et al.
patent: 4458599 (1984-07-01), Mullendore et al.

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