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Combination Of Investment And Centrifugal CastingModifications, including incorporation of centrifugal casting, made in investment-casting process reducing scrap rate. Used to make first- and second-stage high-pressure-fuel-turbopump nozzles, containing vanes with thin trailing edges and other thin sections. Investment mold spun for short time while being filled, and stopped before solidification occurs. Centrifugal force drives molten metal into thin trailing edges, ensuring they are filled. With improved filling, preheat and pour temperatures reduced and solidification hastened so less hot tearing.
Document ID
19940000610
Acquisition Source
Legacy CDMS
Document Type
Other - NASA Tech Brief
Authors
Creeger, Gordon A.
(Rockwell International Corp.)
Date Acquired
August 16, 2013
Publication Date
November 1, 1994
Publication Information
Publication: NASA Tech Briefs
Volume: 18
Issue: 11
ISSN: 0145-319X
Subject Category
Fabrication Technology
Report/Patent Number
MFS-29949
Accession Number
94B10610
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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