Alloy niobium tantalum
Technical characteristicsIn alloys of niobium with tantalum minimum oxidation rate at high temperatures has a composition containing about 33% The same, and that small additions of zirconium to cause dispersion hardening of the alloy without increasing its rate of oxidation. On the basis of niobium was created by the construction material containing 33% TA, 0.8% of Zr. At the high temperature strength and oxidation resistance, this triple composition is superior to alloys of niobium or tantalum. In addition, this composition is characterized by a highly valuable combination of other properties, in particular workability, ductility at low temperatures and weldability.
Additives of tungsten
Tungsten contributes to the effective hardening, but also significantly increases the high temperature strength of double alloys, Ta-W and Nb-W. it is Known that tungsten in amounts up to 10% (by weight) does not impair the original oxidation of the ternary alloy. This alloy has an optimal combination of the following properties: high temperature strength, a large ratio of strength to weight, workability, ductility at low temperature, weldability and resistance to oxidation.
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