TiAl intermetallic compound-based alloy
AssigneeMitsubishi Heavy Industries, Ltd.
InventorToshimitsu Tetsui
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Abstract
This invention relates to a TiAl intermetallic compound-based alloy exhibiting excellent heat resistance, oxidation resistance and resonance resistance and having a cast structure composed of fine equiaxed grains. Specifically, it relates to a TiAl intermetallic compound-based alloy comprising of 45 to 48 atomic percent of Al, 5 to 9 atomic percent of Nb, 1 to 2 atomic percent of Cr, 0.2 to 0.5 atomic percent of Si, 0.3 to 2 atomic percent of Ni, 0.01 to 0.05 atomic percent of Y, and the balance being Ti and incidental impurities, the alloy exhibiting excellent heat resistance, oxidation resistance and resonance resistance and having a cast structure formed of fine equiaxed grains.
Claims17
A TiAl intermetallic compound-based alloy comprising 45 to 48 atomic percent of Al, 7 up to 8 atomic percent of Nb, 1 to 2 atomic percent of Cr, 0.2 to 0.5 atomic percent of Si, 0.3 to 2 atomic percent of Ni, 0.01 to 0.05 atomic percent of Y, and the balance being Ti and incidental impurities, the alloy exhibiting excellent heat resistance, oxidation resistance and resonance resistance and having a cast structure formed of fine equiaxed grains.
A TiAl intermetallic compound-based alloy comprising between about 46 and about 47 atomic percent Al, 7 up to 8 atomic percent Nb, between about 1.2 and about 1.6 atomic percent Cr, between about 0.3 and about 0.4 atomic percent Si, between about 0.5 and about 1.2 atomic percent Ni, between about 0.2 and about 0.4 atomic percent Y, the balance being Ti and incidental impurities, the alloy having excellent heat resistance, oxidation resistance, and resonance resistance, and having a cast structure formed of fine equiaxed grains.
A cast rotating component, said component being formed of a TiAl intermetallic compound-based alloy comprising 45 to 48 atomic percent of Al, 7 up to 8 atomic percent of Nb, 1 to 2 atomic percent of Cr, 0.2 to 0.5 atomic percent of Si, 0.3 to 2 atomic percent of Ni, 0.01 to 0.05 atomic percent of Y, and the balance being Ti and incidental impurities, the alloy exhibiting excellent heat resistance, oxidation resistance and resonance resistance and having a cast structure formed of fine equiaxed grains.
Dependencies are inferred from the claim text.