Ni-based alloy having excellent high-temperature oxidation resistance

Abstract

To provide a Ni-based alloy having excellent high-temperature oxidation resistance even though the Cr content is reduced. The Ni-based alloy comprises, by mass, 2.0% to 5.0% of Al, 0.1% to 2.5% of Si, 0.1% to 1.5% of Mn, 0.4% to 3.0% of V, 0.001% to 0.05% of B, 0.001% to 0.1% of Zr, and the balance of Ni with inevitable impurities. The Ni-based alloy further comprises 2.0% or less of Mo in addition to this composition. Such a Ni-based alloy is also excellent in hot workability.

1 . A Ni-based alloy having excellent high-temperature oxidation resistance, comprising, by mass,
 2.0% to 5.0% of Al,   0.1% to 2.5% of Si,   0.1% to 1.5% of Mn,   0.4% to 3.0% of V,   0.001% to 0.05% of B,   0.001% to 0.1% of Zr, and   the balance of Ni with inevitable impurities.   
     
     
         2 . The Ni-based alloy having excellent high-temperature oxidation resistance according to  claim 1 , wherein the Ni-based alloy comprises 1.0% to 3.0% by mass of V. 
     
     
         3 . The Ni-based alloy having excellent high-temperature oxidation resistance according to  claim 1 , further comprising 2.0% by mass or less of Mo.