Home

Primary Examiner: Baldwin, Robert D.
Assistant Examiner: Lin, K. Y.
Attorney: Nessler; Charles G.

Next ten patents ordered by date:

Chill roll casting of continuous filament
Manipulator for separating coated permanent moulds
Apparatus for making foundry cores
Multiple component circuit board cooling device
Heat transfer system for the utilization of cavities dug in the subsoil as heat silos
Internal heat exchanger for meat
Heat exchanger tube base
Air cooled condenser installation
Continuous casting of metal strip between moving belts
Heat exchanger having helically wound tube coils

Translate:
En
De
Es
Fr
It
Pt
Ja
Ko
Zh

Title: Rate controlled directional solidification method

Abstract: An improved method of directional solidification is provided by varying the rate of withdrawal of a casting from the hot zone of a solidification furnace according to the sense of change of the perimeter to area ratio of the casting. The rates are varied to achieve desired microstructure and resultant properties in the casting. Also, the rate of withdrawal is varied according to controlled and predetermined relationships to cause the solidification interface to move through a transition section connecting sections of differing perimeter to area ratios in a manner which produces a desired microstructure in a first, transition, and second sections.

Do you think this is a good invention? Vote now:

Votes so far: For:(0) Against:(0)
Other info:

Inventors: Giamei, Anthony F. (Middletown, CT, US)

Application Number: 954386
Filing Date: 1978-10-25
Publication_date: 1980-02-26
Assignee: United Technologies Corporation (Hartford, CT)
Primary Class(es): 164/122.1 164/125
Other Classes:
US Patent Ref:

3124452	Mar, 1964	Kraft	164/128.
3677835	Jul, 1972	Tien et al.	148/32.
3700023	Oct, 1972	Giamei et al.	164/60.
3763926	Oct, 1973	Tschinkel et al.	164/338.
3790303	Feb, 1974	Endress	416/241.
3897815	Aug, 1975	Smashey	164/127.
3915761	Oct, 1975	Tschinkel et al.	164/127.

Other Refs: Other References: "Computer Application in Directional Solidification Process" by Giamei et al, 3rd International Symposium on Superalloys-AIME, Seven Springs, Pa., 9/76.
"Growth of Composites from the Melt-Part II" by Mollard, et al., Trans. of AIME, vol. 239, 10/67, p. 1534.