manufacturing method for structural stability and high-temperature strength in excellent Ni-based alloys and Ni-base alloy material

摘要

PROBLEM TO BE SOLVED: To provide a Ni-based alloy having stable high temperature characteristic even at a using temperature of ≥700°C.;SOLUTION: This Ni-based alloy contains 0.005-0.1% C, 8-15% Cr, 1-7% Mo, 5-20% W, 0.5-1.0% Al 1.0-2.5% Ti and if desired, at least one or more kinds of ≤1.0% Nb, ≤0.015% B and ≤0.01% Mg, and the balance Ni with inevitable impurities. The structure is made stable even at high temperature of ≥700°C and the excellent high temperature characteristic is obtained. By regulating the balance of Mo and W to 0.1≤Mo/(Mo+W)≤0.5, this alloy is made more excellent in the high temperature strength, high temperature ductility and creep characteristic. By regulating the balance of Al and Ti to 0.2≤Al/Ti≤1.0, this alloy is made more excellent in the high temperature tensile characteristic and the creep characteristic.;COPYRIGHT: (C)2009,JPO&INPIT