Precipitation hardening Ni base alloy
AssigneeHitachi Metals, Ltd.
InventorRikizo Watanabe
Life of this patent
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Abstract
Precipitation hardening Ni base alloys comprising not more than 0.2% by weight of C, 17 to 19% by weight of Cr, 3.5 to 4.5% by weight of Mo, 5 to 7% by weight of W, 5 to 15% by weight of Co, 1.75 to 2.25% by weight of Al, 2.0 to 3.5% by weight of Ti, not more than 0.02% by weight of B, not more than 0.3% by weight of Zr and the balance of Ni and incidental impurities have good hot workability and high stress rupture strength at high temperatures of about 1,000.degree.C.
Claims11
A precipitation hardening Ni base alloy consisting essentially of not more than 0.2% by weight of C, 17 to 19% by weight of Cr, 3.5 to 4.5% by weight of Mo, 5to 7% by weight of W, 5 to 15% by weight of Co, 1.75 to 2.25% by weight of A1, 2.0 to 3.5% by weight of Ti, not more than 0.02% by weight of B, not more than 0.3% by weight of Zr and the balance of Ni except incidental impurities.
A precipitation hardening Ni base alloy consisting essentially of not more than 0.1% by weight of C, 17.5 to 19% by weight of Cr, 3.5 to 4.5% by weight of Mo, 5.5 to 6.5% by weight of W, 8 to 12% by weight of Co, 1.8 to 2.2% by weight of A1, 2.0 to 3.0% by weight of Ti, not more than 0.01% by weight of B, not more than 0.15% by weight of Zr and the balance of Ni except incidental impurities.
A precipitation hardening Ni base alloy consisting essentially of about 0.05% by weight of C, about 18% by weight of Cr, about 4% by weight of Mo, about 6% by weight of W, about 10% by weight of Co, about 2% by weight of A1, about 2.5% by weight of Ti, about 0.003% by weight of B, about 0.07% by weight of Zr and the balance of Ni except incidental impurities.
Dependencies are inferred from the claim text.