Superalloy compositions, articles, and methods of manufacture
AssigneeUnited Technologies Corporation
InventorPaul L. Reynolds
Life of this patent
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Abstract
A composition of matter comprises, in combination, in weight percent: a largest content of nickel; at least 16.0 percent cobalt; and at least 3.0 percent tantalum. The composition may be used in power metallurgical processes to form turbine engine turbine disks.
Claims20
A composition of matter, comprising in combination, in weight percent:
- a content of nickel as a largest content;
- at least 16.0 percent cobalt;
- at least 6.0 percent tantalum;
- 3.0-3.5 percent aluminum;
- 8.5-11.0 percent chromium;
- 2.5-3.4 percent molybdenum;
- 0.8-2.0 percent niobium;
- at least 1.5 percent titanium;
- and
- at least 0.02 percent boron.
A powder metallurgical gas turbine engine disk or disk substrate comprising in combination, in weight percent:
- from about 18.0 percent to about 21.0 percent cobalt, from about 8.5 percent to about 11.0 percent chromium, from about 6.5 percent to about 8.5 percent tantalum, from about 2.2 percent to about 2.75 percent tungsten, from about 2.5 percent to about 3.4 percent molybdenum, from about 0.03 percent to about 0.07 percent zirconium, from about 0.8 percent to about 2.0 percent niobium, from about 2.0 percent to about 2.75 percent titanium, from about 3.0 percent to about 3.5 percent aluminum, from about 0.02 percent to about 0.07 percent carbon, from about 0.02 percent to about 0.06 percent boron;
- and
- balance nickel and minor amounts of impurities.
A powder metallurgical gas turbine engine disk or disk substrate comprising in combination, in weight percent:
- a content of nickel as a largest content;
- at least 16.0 percent cobalt;
- at least 26.0 percent combined cobalt and chromium;
- at least 3.0 percent tantalum;
- at least 0.5 percent niobium;
- at least 3.0 percent aluminum;
- and
- a titanium content, a ratio of said titanium content to said aluminum content being at least 0.57.
A powder metallurgical gas turbine engine disk or disk substrate comprising in combination, in weight percent:
- from 18.0 percent to 21.0 percent cobalt, from 8.5 percent to 11.0 percent chromium, from 6.5 percent to 8.5 percent tantalum, from 2.2 percent to 2.75 percent tungsten, from 2.5 percent to 3.4 percent molybdenum, from 0.03 percent to 0.07 percent zirconium, from 0.8 percent to 2.0 percent niobium, from 2.0 percent to 2.75 percent titanium, from 3.0 percent to 3.5 percent aluminum, from 0.02 percent to 0.07 percent carbon, from 0.02 percent to 0.06 percent boron;
- and
- nickel as a largest content.
Dependencies are inferred from the claim text.