Nickel-based superalloy and parts made from said superalloy
AssigneeAubert & Duval
InventorsAlexandre Devaux, Philippe Heritier
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Abstract
A nickel superalloy has the following composition, the concentrations of the different elements being expressed as wt-%: Formula (I), the remainder consisting of nickel and impurities resulting from the production of the superalloy. In addition, the composition satisfies the following equation, wherein the concentrations of the different elements are expressed as atomic percent: Formula (II).
Claims13
A nickel-based superalloy of the following composition, the contents of the various elements being expressed as weight percentages:
- 1.8%≤Al≤2.8%;
- 7%≤Co≤10%;
- 14%≤Cr≤17%;
- 3.6%≤Fe≤7%;
- 2%≤Mo≤4%;
- 0.5%≤Nb+Ta≤2%;
- 2.8%≤Ti≤4.2%;
- 1.5%≤W≤3.5%;
- 0.0030%≤B≤0.030%;
- trace amounts≤C<0.04%;
- 0.01%≤Zr≤0.06%,
- the composition satisfies the following equations in which the contents are expressed as atomic percentages:
- 8≤Al at %+Ti at %+Nb at %+Ta at %≤11
- 0.7≤(Ti at %+Nb at %+Ta at %)/Al at %≤1.3, and
- the remainder consists of nickel and of impurities resulting from the production.
A nickel-based superalloy of the following composition, the contents of the various elements being expressed as weight percentages:
- 1.8%≤Al≤2.8%;
- 7%≤Co≤10%;
- 14%≤Cr≤17%;
- 3.6%≤Fe≤7%;
- 2%≤Mo≤4%;
- 0.5%≤Nb+Ta≤2%;
- 2.8%≤Ti≤4.2%;
- 1.5%≤W≤3.5%;
- 0.0030%≤B≤0.030%;
- trace amounts≤C≤0.07%;
- 0.01%≤Zr≤0.06%,
- the composition satisfies the following equations in which the contents are expressed as atomic percentages:
- 8≤Al at %+Ti at %+Nb at %+Ta at %≤11
- 0.7≤(Ti at %+Nb at %+Ta at %)/Al at %≤1.3, and
- the remainder consists of nickel and of impurities resulting from the production, the superalloy being obtained by casting of an ingot from liquid metal.
Dependencies are inferred from the claim text.