Ni-based superalloy for hot forging
AssigneeDaido Steel Co., Ltd.
InventorsMototsugu Osaki, Shigeki Ueta, Kohki Izumi
Life of this patent
Estimating the term…
Abstract
The present invention relates to an Ni-based superalloy for hot forging, containing, in terms of % by mass, C: more than 0.001% and less than 0.100%, Cr: 11% or more and less than 19%, Co: more than 5% and less than 25%, Fe: 0.1% or more and less than 4.0%, Mo: more than 2.0% and less than 5.0%, W: more than 1.0% and less than 5.0%, Nb: 0.3% or more and less than 4.0%, Al: more than 3.0% and less than 5.0%, Ti: more than 1.0% and less than 3.0%, and Ta: 0.01% or more and less than 2.0%, with the balance being unavoidable impurities and Ni, in which the component composition satisfies the following two relationships: 3.5≤([Ti]+[Nb]+[Ta])/[Al]×10<6.5 and 9.5≤[Al]+[Ti]+[Nb]+[Ta]<13.0.
Claims20
A Ni-based superalloy for hot forging, having a component composition consisting of, in terms of % by mass:
- C:
- more than 0.001% and less than 0.100%;
- Cr:
- 11% or more and less than 19%;
- Co:
- more than 5% and less than 25%;
- Fe:
- 0.1% or more and less than 4.0%;
- Mo:
- more than 2.0% and less than 5.0%;
- W:
- more than 1.0% and less than 5.0%;
- Nb:
- 1.9% or more and less than 4.0%;
- Al:
- more than 3.0% and less than 5.0%;
- Ti:
- more than 1.0% and less than 3.4%;
- and
- Ta:
- 0.01% or more and less than 2.0%,
- with a balance being unavoidable impurities and Ni,
- wherein, when a content of an element M in terms of atomic % is represented by [M], the component composition satisfies following two relationships:
- 4.5≤([Ti]+[Nb]+[Ta])/[Al]×10<6.5;
- and
- 10.5≤[Al]+[Ti]+[Nb]+[Ta]<13.0, and
- wherein the Ni-based superalloy has a 0.2% yield strength at 730° C. of 970 MPa or more, and a tensile strength at 730° C. of 1,110 MPa or more.
A Ni-based superalloy for hot forging, having a component composition consisting of, in terms of % by mass:
- C:
- more than 0.001% and less than 0.100%;
- Cr:
- 11% or more and less than 19%;
- Co:
- more than 5% and less than 25%;
- Fe:
- 0.1% or more and less than 4.0%;
- Mo:
- more than 2.0% and less than 5.0%;
- W:
- more than 1.0% and less than 5.0%;
- Nb:
- 1.9% or more and less than 4.0%;
- Al:
- more than 3.0% and less than 5.0%;
- Ti:
- more than 1.0% and less than 3.4%;
- Ta:
- 0.01% or more and less than 2.0%;
- and
- at least one selected from the group consisting of:
- B:
- less than 0.03%;
- Zr:
- less than 0.1%;
- Mg:
- less than 0.030%;
- Ca:
- less than 0.030%;
- and
- rare earth metal (REM):
- 0.200% or less,
- with a balance being unavoidable impurities and Ni,
- wherein, when a content of an element M in terms of atomic % is represented by [M], the component composition satisfies following two relationships:
- 4.5≤([Ti]+[Nb]+[Ta])/[Al]×10<6.5;
- and
- 10.5≤[Al]+[Ti]+[Nb]+[Ta]<13.0, and
- wherein the Ni-based superalloy has a 0.2% yield strength at 730° C. of 970 MPa or more, and a tensile strength at 730° C. of 1,110 MPa or more.
A Ni-based superalloy for hot forging, having a component composition consisting of, in terms of % by mass:
- C:
- more than 0.001% and less than 0.100%;
- Cr:
- 11% or more and less than 19%;
- Co:
- more than 15% and less than 25%;
- Fe:
- 0.1% or more and less than 4.0%;
- Mo:
- more than 2.0% and less than 5.0%;
- W:
- more than 1.0% and less than 5.0%;
- Nb:
- 2.1% or more and less than 4.0%;
- Al:
- more than 3.0% and less than 5.0%;
- Ti:
- more than 1.0% and 2.2% or less;
- and
- Ta:
- 0.01% or more and less than 2.0%,
- with a balance being unavoidable impurities and Ni,
- wherein, when a content of an element M terms of atomic % is represented by [M], the component composition satisfies following two relationships:
- 4.5≤([Ti]+[Nb]+[Ta])/[Al]×10<6.5;
- and
- 10.5≤[Al]+[Ti]+[Nb]+[Ta]≤11.5, and
- wherein the Ni-based superalloy has a 0.2% yield strength at 730° C. of 970 MPa or more, and a tensile strength at 730° C. of 1,110 MPa or more.
Dependencies are inferred from the claim text.