US 12,005,493 B2
Arcuate seed casting method
Dilip M. Shah, Glastonbury, CT (US); Steven J. Bullied, Pomfret, CT (US); Ryan C. Breneman, Newington, CT (US); Shiela R. Woodard, South Windsor, CT (US); and Carl R. Verner, Windsor, CT (US)
Assigned to RTX Corporation, Farmington, CT (US)
Filed by Raytheon Technologies Corporation, Farmington, CT (US)
Filed on Jun. 1, 2022, as Appl. No. 17/829,786.
Application 17/829,786 is a continuation of application No. 17/062,031, filed on Oct. 2, 2020, granted, now 11,383,295.
Claims priority of provisional application 62/936,192, filed on Nov. 15, 2019.
Claims priority of provisional application 62/911,121, filed on Oct. 4, 2019.
Prior Publication US 2022/0288674 A1, Sep. 15, 2022
Int. Cl. B22D 27/04 (2006.01); C30B 11/14 (2006.01); C30B 29/52 (2006.01)
CPC B22D 27/04 (2013.01) [B22D 27/045 (2013.01); C30B 11/14 (2013.01); C30B 29/52 (2013.01)] 20 Claims
OG exemplary drawing
 
1. 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.