Metal founding – Process – Shaping liquid metal against a forming surface
Patent
1978-04-17
1980-12-23
Powell, Jr., Everette A.
Metal founding
Process
Shaping liquid metal against a forming surface
416241R, 416244A, 164 60, 164127, B22D 2704
Patent
active
042404959
ABSTRACT:
A cast metal turbine wheel is made comprising a cylindrical disc with equiaxed grains and integral blades with columnar grains oriented substantially parallel to the leading and trailing blade edges. The blades are solidified unidirectionally by withdrawing heat through chill means located adjacent the mold at the blade tips. Cooling is inhibited from other blade surfaces by retaining cast metal in mold portions located above and below the blades. The disc portion of the mold is insulated so that it cools slowly to promote grain nucleation throughout the metal therein and equiaxed grain growth.
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General Motors Corporation
Grove George A.
Powell Jr. Everette A.
Trausch, III A. N.
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