Ni-based alloy having excellent hot forgeability and corrosion resistance, and large structural member
A Ni-based alloy having excellent hot forgeability and corrosion resistance includes, by mass %, Cr: more than 18% to less than 21%, Mo: more than 18% to less than 21%, Ta: 1.1% to 2.5%, Mg: 0.001% to 0.05%, N: 0.001% to 0.04%, Mn: 0.001% to 0.5%, Si: 0.001% to 0.05%, Fe: 0.01% to 1%, Co: 0.01% or more and less than 1%, Al: 0.01% to 0.5%, Ti: 0.01% or more and less than 0.1%, V: 0.005% or more and less than 0.1%, Nb: 0.001% or more and less than 0.1%, B: 0.0001% to 0.01%, Zr: 0.001% to 0.05%, and a balance consisting of Ni and unavoidable impurities.
1. A Ni-based alloy having improved hot forgeability and corrosion resistance comprising, by mass%:
Cr: more than 18% to less than 21%;
Mo: more than 18% to less than 21%;
Ta: 1.1% to 2.5%;
Mg: 0.001% to 0.05%;
N: 0.001% to 0.04%;
Mn: 0.001% to 0.5%;
Si: 0.001% to 0.05%;
Fe: 0.01% to 1%;
Co: 0.01% or more and less than 1%;
Al: 0.01% to 0.5%;
Ti: 0.01% or more and less than 0.1%;
V: 0.005% or more and less than 0.1%;
Nb: 0.001% or more and less than 0.1%;
B: 0.0001% to 0.01%;
Zr: 0.001% to 0.05%; and
a balance consisting of Ni and unavoidable impurities.
2. The Ni-based alloy having improved hot forgeability and corrosion resistance according to claim 1 further comprising, by mass %, one or more of
Cu: 0.001% or more and less than 0.1%, and
W: 0.001% or more and less than 0.1%.
3. The Ni-based alloy having improved hot forgeability and corrosion resistance according to claim 1 further comprising, by mass %,
Ca: 0.001% or more and less than 0.05%.
4. The Ni-based alloy having improved hot forgeability and corrosion resistance according to any one of claims 1 further comprising, by mass %,
Hf: 0.001% or more and less than 0.05%.
5. A large structural member formed by the Ni-based alloy having improved hot forgeability and corrosion resistance according to claim 1 .
6. The Ni-based alloy having improved hot forgeability and corrosion resistance according to claim 1 , wherein an amount of Mo is 18.5% to less than 21%.
7. The Ni-based alloy having improved hot forgeability and corrosion resistance according to claim 1 , wherein the amount of Ta is 1.5% to 2.5%.
8. The Ni-based alloy having improved hot forgeability and corrosion resistance according to claim 1 , wherein an amount of Mo is 18.5% to less than 21% and an amount of Ta is 1.5% to 2.5%.