Nickel-base alloys and methods of heat treating nickel-base...

Details Nickel-base alloys and methods of heat treating nickel-base... Nickel-base alloys and methods of heat treating nickel-base...

C - Chemistry, Metallurgy

22

F

C22F 1/10 (2006.01) C22C 19/05 (2006.01)

Patent

CA 2540212

Embodiments of the present invention relate to nickel-base alloys, and in particular 718-type nickel-base alloys, having a desired microstructure that is predominantly strengthened by .gamma.'-phase precipitates and comprises an amount of at least one grain boundary precipitate. Other embodiments of the present invention relate to methods of heat treating nickel-base alloys, and in particular 718-type nickel-base alloys, to develop a desired microstructure that can impart thermally stable mechanical properties. Articles of manufacture using the nickel-base alloys and methods of heat treating nickel- base alloys according to embodiments of the present invention are also disclosed.

Les modes de réalisation de la présente invention concernent des alliages à base de nickel et notamment des alliages à base de nickel de type 718 ayant une microstructure voulue, laquelle est renforcée essentiellement par des précipités en phase .gamma.' et renfermant une quantité d'au moins un précipité de joint de grain. D'autres modes de réalisation de la présente invention concernent des procédés de traitement à chaud d'alliage à base de nickel, et notamment d'alliages à base de nickel de type 718, afin de développer une microstructure voulue pouvant conférer des propriétés mécaniques stables thermiquement. L'invention concerne également des articles de production utilisant les alliages à base de nickel ainsi que des procédés de traitement à chaud d'alliages à base de nickel selon les modes de réalisation de la présente invention.

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