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US 4,784,690 AGranted
Low density tungsten alloy article and method for producing same
AssigneeGTE Products Corporation
InventorJames A. Mullendore
Life of this patent
Estimating the term…
Abstract
A low density tungsten alloy article is disclosed and the method for producing the article. The method involves compacting a relatively uniform tungsten alloy powder with the tungsten content comprising no greater than about 90% by weight of the alloy and the balance a matrix phase to produce a preformed article which is then sintered in a reducing atmosphere at a temperature below the melting point of the matrix phase for a sufficient time to form a densified article which is mechanically worked to produce the final article.
Claims6
A method for producing a low density tungsten alloy article, said method comprising:
- (a) compacting a relatively uniform tungsten alloy powder with the tungsten content comprising no greater than about 90% by weight of said alloy and the balance a matrix phase consisting essentially of iron and nickel in a weight of nickel to iron being from about 4 to 1 to about 1 to 1 to produce a preformed article:
- (b) sintering said preformed article in a reducing atmosphere at a temperature below the melting point of said matrix phase for a sufficient time to form a densified article;
- (c) mechanically working said densified article to produce the final article.
Dependencies are inferred from the claim text.