Nickel based superalloys with excellent mechanical strength,...

Details Nickel based superalloys with excellent mechanical strength,... Nickel based superalloys with excellent mechanical strength,...

2005-08-29

2009-10-06

Wyszomierski, George (Department: 1793)

Alloys or metallic compositions

Nickel base

Chromium containing

C420S449000, C420S450000, C420S451000, C420S460000

Reexamination Certificate

active

07597843

ABSTRACT:
Nickel based superalloys with excellent mechanical strength, corrosion resistance and oxidation resistance, which consist essentially of chromium in an amount of 3 to 7% by weight, cobalt in an amount of 3 to 15% by weight, tungsten in an amount of 4.5 to 8% by weight, rhenium in an amount of 3.3 to 6% by weight, tantalum in an amount of 4 to 8% by weight, titanium in an amount of 0.8 to 2% by weight, aluminum in an amount of 4.5 to 6.5% by weight, ruthenium in an amount of 0.1 to 6%, hafnium in an amount of 0.01 to 0.2% by weight, molybdenum in an amount of less than 0.5% by weight, carbon in an amount 0.06% by weight or less, boron in an amount of 0.01% by weight or less, zirconium in an amount of 0.01% by weight or less, oxygen in an amount of 0.005% by weight or less, nitrogen in an amount of 0.005% by weight or less and inevitable impurities and the balance being nickel.

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Zheng et al., “Effect of RU Addition on Cast Nickel Base Superalloy with Low Content of CR and High Content of W” Superalloys 2000, pp. 305-311, The Minerals, Metals & Materials Society.

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