Ni-Ir-BASED HEAT-RESISTANT ALLOY AND PROCESS FOR PRODUCING SAME

WIPO Patent Application WO/2015/146931

A1

This Ni-Ir-based heat-resistant alloy is constituted of an Ni-Ir-Al-W alloy comprising 5.0-50.0 mass% Ir, 1.0-8.0 mass% Al, 5.0-20.0 mass% W, and Ni as the remainder and contains, as an essential reinforcing phase, a γ' phase that has an L12 structure and has been precipitated and dispersed in the matrix. When the Ni-Ir-based heat-resistant alloy is analyzed by X-ray diffractometry, the ratio of the intensity (Y) of the peak for the (201) plane of an Ir3W phase which is observed in the 2θ range of 48-50° to the intensity (X) of the peak for the (111) plane of the γ' phase which is observed in the 2θ range of 43-45°, Y/X, is 0.5 or less. This alloy is a heat-resistant Ni-based alloy which stably exhibits satisfactory high-temperature properties.

ISHIDA KIYOHITO (JP)
OMORI TOSHIHIRO (JP)
SATO YUTAKA (JP)
TANAKA KUNIHIRO (JP)
NAKAMURA MUNEKI (JP)
SAKAIRI KOICHI (JP)
NAKAZAWA TATSUYA (JP)

PCT/JP2015/058785

October 01, 2015

March 23, 2015

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TANAKA PRECIOUS METAL IND (JP)

C22C19/05; C22C5/04; C22C30/00; C22F1/10; C22F1/00

JP2001294959A	2001-10-26
JP2010132966A	2010-06-17
JP2011225930A	2011-11-10
JP5721189B2	2015-05-20

C.ZHANG ET AL.: "Modeling of phase stability of the fcc phases in the Ni-Ir-Al system using the cluster/site approximation method coupling with first-principles calculations", ACTA MATERIALIA, vol. 56, 14 March 2008 (2008-03-14), pages 2576 - 2584, XP022699328

TANAKA AND OKAZAKI (JP)
Patent business corporation Tanaka and Okazaki and associates (JP)

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