METHOD OF MAKING LARGE GRAIN-SIZED SUPERALLOYS

摘要

A process for making nickel-base superalloys possessing superior high-temperature properties which employs powder metallurgical techniques and includes the steps of densifying the powdered alloy into a blank approaching 100 percent theoretical density, cold working the blank at a controlled temperature, recrystallizing the cold-worked blank for a period of time sufficient to nucleate new grains and thereafter heat treating the recrystallized blank at a controlled temperature for a period of time sufficient to attain the desired magnitude of grain growth.