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US 4,637,449 AGranted
Component casting
AssigneeROLLS-ROYCE plc
InventorsDavid Mills, Anthony T. Lindahl, Alan D. Kington
Life of this patent
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AssigneeROLLS-ROYCE plc
InventorsDavid Mills, Anthony T. Lindahl, Alan D. Kington
Estimating the term…
A reinforced tubular core for casting gas turbine engine blades with cooling air passages therein is disclosed. A method of casting is also disclosed in which the blades are directionally solidified to produce columnar grained or single crystal blades and in which non-linear passages can be produced. The problem in producing such articles is that the moulds and cores used in the casting process are held at temperatures in excess of 1500.degree. for long periods and presently used Silica cores deform during the process. Stronger cores of Alumina or Silicon Nitride cannot be easily bent were believed to be non-leachable from the casting. The present invention provides a core having a tubular silica sheath with a solid alumina rod inside it for support. The sheath can be bent and the straight alumina rods can be inserted from opposite ends of the sheath.
A method of casting a nickel- or cobalt-based superalloy component comprising the steps of:
A method of casting a nickel- or cobalt-based superalloy component comprising the steps of:
A core for use in a mold for casting nickel- or cobalt-based superalloy, said core defining a passage in a nickel- or cobalt-based superalloy casting component and comprising:
A core for use in a mold for casting nickel- or cobalt-based superalloy, said core defining a passage in a nickel- or cobalt-based superalloy casting component and comprising:
A core for defining a passage in a nickel- or cobalt-based superalloy casting component, comrpising:
A core for defining a passage in a nickel- or cobalt-based superalloy casting component, comprising:
A mold for casting nickel- or cobalt-based superalloy, said mold comrpising:
A mold for casting nickel- or cobalt-based superalloy, said mold comprising:
Dependencies are inferred from the claim text.