High-powder tungsten-based sintered alloy

Details High-powder tungsten-based sintered alloy High-powder tungsten-based sintered alloy

2007-06-05

2007-06-05

Mai, Ngoclan T. (Department: 1742)

Specialized metallurgical processes, compositions for use therei

Compositions

Consolidated metal powder compositions

C102S517000, C419S046000, C419S047000, C419S054000, C419S058000

Reexamination Certificate

active

10490962

ABSTRACT:
Tungsten-based alloy material sintered at a high sintering power that may contain additive elements soluble in the nickel and selected from the group constituted, for example, by rhenium, molybdenum, tantalum, niobium, vanadium or a mixture of these, wherein, after sintering in liquid phase at a temperature of around 1500° C., it has:a two-phased α-γ microstructure that is fully densified, has no porosities or has negligible porosities of a low mean grain size (Lα) and a contiguity (Cαα) that is very low with respect to the size of the tungsten crystals,and a dispersion of micro-oxides with no loss of ductility properties.

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