Ni-based alloy for forging, method for manufacturing the same, and turbine component

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(11)

EP 2 835 434 A3

(12)	EUROPEAN PATENT APPLICATION

(88)	Date of publication A3:
	27.05.2015 Bulletin 2015/22

(43)	Date of publication A2:
	11.02.2015 Bulletin 2015/07

(21)	Application number: 14179191.3

(22)	Date of filing: 30.07.2014

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International Patent Classification (IPC):

C22C 19/05^(2006.01)

C22F 1/10^(2006.01)

(84)	Designated Contracting States:
	AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
	Designated Extension States:
	BA ME

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Priority:

07.08.2013 JP 2013164148

(71)	Applicant: Kabushiki Kaisha Toshiba
	Tokyo 105-8001 (JP)

(72)	Inventors:
	Miyashita, Shigekazu Tokyo (JP) Imai, Kiyoshi Tokyo (JP) Nemoto, Kuniyoshi Tokyo (JP) Oinuma, Shun Tokyo (JP) Iwai, Shogo Tokyo (JP) Suga, Takeo Tokyo (JP)

(74)	Representative: Granleese, Rhian Jane
	Marks & Clerk LLP 90 Long Acre London WC2E 9RA London WC2E 9RA (GB)

(54)	Ni-based alloy for forging, method for manufacturing the same, and turbine component

(57) An Ni-based alloy for forging of an embodiment contains, in mass%, C: 0.01 to 0.07%, Cr: 14 to 26%, Co: 10 to 15%, Mo: 5 to 12%, Al: 0.8 to 3%, Ti: 0.8 to 3%, and B: 0.001 to 0.006%, the balance being made of Ni and an unavoidable impurity, and satisfies a relation of 10 mass% ≤ Mo + 0.176Cr + 0.037Co ≤ 15 mass%. Further, an average thickness of a carbide precipitated along a grain boundary is 250 nm or less.

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