SINGLE-CRYSTAL SUPER ALLOY ON THE BASIS OF Ni AND TURBINE SHOVEL

摘要

1. A monocrystalline superalloy based on Ni, which has the following composition by weight: 0.1 wt.% Or more and 9.9 wt.% Or less Co, 5.1 wt.% Or more and 10.0 wt.% Or less than Cr, 1.0 wt.% or more and 4.0 wt.% or less Mo, 8.1 wt.% or more and 11.0 wt.% or less W, 4.0 wt.% or more and 9.0 wt.% Or less Ta, 5.2 wt.% Or more and 7.0 wt.% Or less Al, 0.1 wt.% Or more and 2.0 wt.% Or less Ti, 0, 05 wt.% Or more and 0.3 wt.% Or less Hf, 1.0 wt.% Or less Nb and less than 3.0 wt.% Re with a residue including Ni and inevitable impurities. 2. A monocrystalline Ni-based superalloy according to claim 1, wherein the amount of Re is 2.0 mass% or less by mass. A single-crystal superalloy based on Ni according to claim 1, wherein the amount of Re is 1.4 wt.% Or less by weight. A monocrystalline Ni-based superalloy according to claim 1, wherein the amount of Re is 0.8 mass% or less by mass. The Ni-based single crystal superalloy according to claim 1, which contains 6.0 wt.% Co, 7.0 wt.% Cr, 1.5 wt.% Mo, 10.0 wt.% W, 5.5 wt.% That, 6.0 wt.% Al, 0.1 wt.% Ti and 0.10 wt.% Hf by mass and does not contain either Nb or Re or contains them as unavoidable impurities. 6. The Ni-based monocrystalline superalloy according to claim 2, which contains 6.0 wt.% Co, 7.0 wt.% Cr, 1.5 wt.% Mo, 10.0 wt.% W, 5.5 wt.% Ta, 6.0 wt.% Al, 0.1 wt.% Ti and 0.10 wt.% Hf by mass and contains neither Nb nor Re or contains them as unavoidable impurities. 7. A monocrystalline Ni-based superalloy according to claim 3, which contains 6.0 wt.% Co, 7.0 wt.% Cr, 1.5 wt.% Mo, 10.0 wt.% W, 5.5 wt.% That, 6.0 wt.% Al, 0.1 wt.% Ti and 0.10 wt.% Hf by weight and contains neither Nb nor Re or contains them as unavoidable impurities. 8. A Ni-based single crystal superalloy according to claim 4, which contains 6.0 wt.% Co, 7.0 wt.% Cr, 1.5 wt.% Mo, 10.0 wt.% W, 5.5 wt.% Ta, 6.0 wt.% Al, 0.1 wt.% Ti and 0.10 wt.% Hf