Patent ID: 6884275
Filing Date: 2005-04-26
Classification: B22F,B23P,C22C

Abstract:
1. A Ni-based sintered alloy, prepared by mixing and heating two kinds of Ni alloy powders differing from each other in the melting point, and wherein the two kinds of Ni alloy powders consist of a high melting point Ni alloy powder having a melting point higher than the heating temperature in carrying out a sintering treatment, and a low melting point Ni alloy powder having a melting point lower than the heating temperature in carrying out the sintering treatment, and wherein IN738LC constitutes the Ni-based alloy used as a base material of the high temperature part, the high melting point Ni alloy powder has a composition of Ni-16 to 18 Cr-0 to 5 Co-0.0 to 3.5 W-0.0 to 1.0 Ta-0.0 to 1.0 Ti-0.0 to 1.0 Al-0.15 to 0.3 C-0.01 to 0.03 B-0.0 to 0.1 Zr, and the low melting point Ni alloy powder has a composition of Ni-8 to 12 Cr-16 to 20 Co-2.0 to 3.5 Mo-1.5 to 2.5 W-5 to 9 Ta-7.5 to 10 Ti-8.5 to 10.5 Al-1 to 3 Nb-0.5 to 3.5 B-0.00 to 0.35Zr.