Abstract: Microstructures of argon-atomized FGH95 and imported Rene'95 superalloy powders after heat treatment were studied.It is shown that homogenization of dendritic microstructure is more difficult to complete than that of cellular mie-rostructure. The dendritic microstructure can be homogenized during heat treatment at 1140℃ for 3h. The solution temperature of FGH95 powder is lower than that of Rene'95.