TRINICKEL ALUMINIDE HEAT-RESISTANT ALLOY

摘要

PROBLEM TO BE SOLVED: To improve the weldability and creep rupture strength in a high temperature region of 1,050°C in a trinickel aluminide alloy.;SOLUTION: The alloy ha a composition containing, by weight, 6.0 to 9.0% Al, 2.0 to 15.0% Cr, 0.5 to 3.0% Zr an one kind selected from ≤3.0% Mo and ≤3.0 Nb, and the balance Ni with inevitable impurities, and has a metallic structure consisting of Ni₃Al as the main phase. In the incorporation of one kind selected from ≤3.0% Mo and ≤3.0% Nb, at least two kinds selected from the groups consisting of ≤3.0% Mo, ≤3.0% Nb and ≤5.0% W can be substituted therefor. If required, the alloy can contain ≤0.3% C, 0.003 to 0.03% N and ≤0.003% B.;COPYRIGHT: (C)2002,JPO