Ni-based superalloy for hot forging

An 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:
• more than 2.6% and less than 3.2%,
• Al:
• more than 3.0% and less than 5.0%,
• Ti:
• more than 1.0% and less than 3.0%, 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
• REM:
• 0.200% or less,
• with the 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 the following two relationships:
• 5.0≤([Ti]+[Nb])/[Al]×10<6.5 and
• 10.1<[Al]+[Ti]+[Nb]≤11.6.

An 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 0.06%,
• Cr:
• 13% or more and less than 19%,
• Co:
• more than 15% and less than 25%,
• Fe:
• 0.1% or more and less than 3.0%,
• Mo:
• more than 2.0% and less than 5.0%,
• W:
• more than 1.0% and less than 5.0%,
• Nb:
• more than 2.6% and less than 3.2%,
• Al:
• more than 3.0% and less than 5.0%, and
• Ti:
• more than 1.0% and less than 3.0%,
• with the 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 the following two relationships:
• 5.0≤([Ti]+[Nb])/[Al]×10<6.5, and
• 10.1≤[Al]+[Ti]+[Nb]≤11.6.