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US 8,524,149 B2Granted
Nickel base wrought alloy
AssigneeHitachi, Ltd.
InventorsJun Sato, Shinya Imano, Hiroyuki Doi
Life of this patent
Estimating the term…
Abstract
A nickel base alloy includes: by mass, 0.001 to 0.1% of carbon; 12 to 23% of chromium; 15 to 25% of cobalt; 3.5 to 5.0% of aluminum; 4 to 12% of molybdenum; 0.1 to 7.0% of tungsten; and a total amount of Ti, Ta and Nb being not more than 0.5%. A parameter Ps represented by a formula (1) shown below is 0.6 to 1.6, Ps=−7×[C]−0.1×[Mo]+0.5×[Al] (1) where [C] indicates an amount of carbon; [Mo] indicates an amount of molybdenum; and [Al] indicates an amount of aluminum, by mass percent.
Claims10
A nickel base alloy comprising, by mass
- 0.001 to 0.1% of carbon
- 12 to 23% of chromium
- 18.5 to 25% of cobalt
- 3.5 to 5.0% of aluminum
- 4 to 10% of molybdenum
- 0.1 to 7.0% of tungsten and
- not more than 0.5% in a total amount of titanium, tantalum and niobium;
- wherein a total amount of molybdenum and tungsten is 4.1 to 12% by mass;
- and
- wherein a parameter Ps represented by a formula (I) shown below is 0.6 to 1.6,
- Ps=−7×[C]−0.1×[Mo]+0.5×[Al] (1)
- where [C] indicates an amount of carbon;
- [Mo] indicates an amount of molybdenum;
- and [Al] indicates an amount of aluminum, by mass percent.
11 more elements
A nickel base alloy comprising, by mass
- 0.03 to 0.08% of carbon
- 16 to 20% of chromium
- 17 to 23% of cobalt
- 3.6 to 4.5% of aluminum
- 5 to 8% of molybdenum
- 2 to 6% of tungsten and
- not more than 0.5% in a total amount of titanium, tantalum and niobium;
- wherein a total amount of molybdenum and tungsten is not more than 12% by mass;
- and
- wherein a parameter Ps represented by a formula (I) shown below is 0.6 to 1.6,
- Ps=−7×[C]−0.1×[Mo]+0.5×[Al] (1)
- where [C] indicates an amount of carbon;
- [Mo] indicates an amount of molybdenum;
- and [Al] indicates an amount of aluminum, by mass percent.
11 more elements
Dependencies are inferred from the claim text.