Ni-base heat-resistant alloy ingot and now it becomes a gas turbine blade casting with a high-temperature strength and dendrites organization

摘要

PROBLEM TO BE SOLVED: To provide an Ni based heat resistant alloy having high strength for producing a gas turbine blade casting, to provide an ingot thereof, and to provide a gas turbine blade casting obtained by commonly casting the Ni based heat resistant alloy having high temperature strength.;SOLUTION: The Ni based heat resistant alloy having high temperature strength has a componential composition containing 12.1 to 13.0% Cr, 8.5 to 11.0% Co, 0.5 to 2.0% Mo, 5.5 to 7.0% W, 5.0 to 6.0% Ta, 3.6 to 4.6% Al, 2.0 to 2.9% Ti, 0.06 to 0.16% C, 0.005 to 0.035% B, 0.010 to 0.070% Zr and one or two kinds selected from Mg and Ca by 1 to 100 ppm in total and, if required, further comprising one or more kinds selected from 0.02 to 0.5% P, 0.02 to 0.5% Rh and 0.02 to 0.5% Re, and the balance Ni with inevitable impurities.;COPYRIGHT: (C)2010,JPO&INPIT