Arcuate seed casting method
AssigneeRtx Corporation
InventorsDilip M. Shah, Steven J. Bullied, Ryan C. Breneman, Shiela R. Woodard, Carl R. Verner
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Abstract
A casting method includes forming a seed. The seed has a first end and a second end and an inner diameter (ID) surface and an outer diameter (OD) surface. The seed second end is placed in contact or spaced facing relation with a chill plate. The first end is contacted with molten material. The molten material is cooled and solidified so that a crystalline structure of the seed propagates into the solidifying material. At least a portion of the seed contacted with the molten material has a solidus higher than a solidus of at least an initial pour portion of the molten material.
Claims20
A casting method comprising:
- forming a seed, the seed having a first end and a second end and an inner diameter (ID) surface and an outer diameter (OD) surface;
- placing the seed second end in contact or spaced facing relation with a chill plate;
- contacting the first end with molten material;
- and
- cooling and solidifying the molten material so that a crystalline structure of the seed propagates into the solidifying material,
- wherein:
- the forming of the seed includes applying a melting point depressant to a seed precursor along at least a portion of the seed contacted with the molten material.
Dependencies are inferred from the claim text.