METHOD FOR MANUFACTURING NI-BASED ALLOY MEMBER

There is provided a method for manufacturing an Ni-based alloy member in which the equilibrium amount of y' phase precipitation at 700°C is from 30 to 70 volume %. The method comprises the steps of: preparing an Ni-based alloy powder having a predetermined chemical composition; forming a precur...

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Bibliographic Details
Main Authors IMANO, Shinya, OTA, Atsuo
Format Patent
LanguageEnglish
French
German
Published 13.02.2019
Subjects
ALLOYS
CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS ANDNON-FERROUS ALLOYS
CHEMISTRY
FERROUS OR NON-FERROUS ALLOYS
METALLURGY
TREATMENT OF ALLOYS OR NON-FERROUS METALS
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Summary:There is provided a method for manufacturing an Ni-based alloy member in which the equilibrium amount of y' phase precipitation at 700°C is from 30 to 70 volume %. The method comprises the steps of: preparing an Ni-based alloy powder having a predetermined chemical composition; forming a precursor body wherein an average grain diameter of the y phase grains is 50 µm or less, by using the Ni-based alloy powder; and heating the precursor body to a temperature at least the y' phase solvus temperature and subsequently slow-cooling the heated precursor body from the temperature to a temperature at least 100°C lower than the y' phase solvus temperature at a cooling rate of 100°C/h or lower. There is obtained a softened body in that the y' phase particles of at least 20 volume % precipitate between/among the y phase grains having an average grain diameter of 50 µm or less.
Bibliography:Application Number: EP20180187810