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US4374084A Expired / Lapsed US ⏱️ 0.0 years remaining

Alloy composition suitable for use in making castings, and a casting made therefrom

Assignee: Rolls Royce PLC
•
Filing: 1981-04-01
•
Granted: 1983-02-15
•
Expires: 2001-04-01
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Abstract

Abstract An alloy is described which is suitable for the manufacture of castings which operate under high temperature conditions (such as nozzle guide vanes for gas turbine engines) but which can also be welded satisfactorily. The alloy comprises ______________________________________ Chromium 14.5-16.5% Cobalt 9-11% Molybdenum 5.5-8% Aluminium 1.5-3% Titanium 1.5-3% Tantalum 0-1% Niobium 0-1% Boron 0.004-0.008% Iron 0-0.5% Manganese 0-0.4% Silicon 0-0.2% Nitrogen 0-0.5% Carbon 0.11-0.18% ______________________________________ The balance being Nickel apart from incidental impurities.

Inventors

  • 👤 Geoffrey W. Meetham
  • 👤 John D. Gray

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-09 03:57
CPC Classifications
C; C22; C22C; C22C19/00; C22C19/03; C22C19/05; C22C19/051; C22C19/056

Claims Analysis

Total Claims: 5
Claim 1
Independent Claim 47 words
An alloy suitable for casting and consisting essentially of by weight percent: ______________________________________ Chromium 14.5-16.5% Cobalt 9-11% Molybdenum 5.5-8% Aluminium 1.5-3% Titanium 1.5-3% Tantalum 0-1% Niobium 0-1% Boron 0.004-0.008% Iron 0-0.5% Manganese 0-0.4% Silicon 0-0.2% Nitrogen 0-0.5% Carbon 0.11-0.18% ______________________________________ balance essentially Nickel apart from incidental impurities
Claim 2
Dependent Claim 47 words
An alloy suitable for casting and consisting essentially of by weight percent: ______________________________________ Chromium 14.5-16.5% Cobalt 9-11% Molybdenum 5.5-8% Aluminium 1.5-3% Titanium 1.5-3% Tantalum 0-1% Niobium 0-1% Boron 0.004-0.008% Iron 0-0.5% Manganese 0-0.4% Silicon 0-0.2% Nitrogen 0-0.5% Carbon 0.11-0.18% ______________________________________ balance essentially Nickel apart from incidental impurities
Claim 3
Dependent Claim 37 words
An alloy as claimed in claim 1 and consisting essentially of by weight percent: ______________________________________ Chromium 15% Cobalt 10% Molybdenum 6.5% Aluminium 2.5% Titanium 2.5% Boron 0.006% Carbon 0.15% ______________________________________ balance essentially Nickel apart from incidental impurities
Claim 4
Dependent Claim 11 words
A casting made of the alloy of claim 1 or 2.
Claim 5
Dependent Claim 17 words
A nozzle guide vane for a gas turbine engine comprising a casting as claimed in claim 3.

References Cited (Backward Citations)

GB955016A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1986-02-14 1986-08-16 1987-02-15 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1990-02-14 1990-08-16 1991-02-15 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1994-02-14 1994-08-16 1995-02-15 $7700.00 Window Closed / Lapsed

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