Method of manufacturing directionally solidified castings

Details Method of manufacturing directionally solidified castings Method of manufacturing directionally solidified castings

1992-04-15

1993-03-30

Lin, Kuang Y.

Metal founding

Process

Shaping liquid metal against a forming surface

164 41, 164154, B22D 2500, B22D 4600

Patent

active

051975319

ABSTRACT:
The invention relates to a method of manufacturing directionally solidified and/or monocrystalline castings including at least one sensor for sensing temperatures in metal or allow melts contained in a mold, including a thermoelement 41 equipped with a heat resistant coating, this thermoelement being introduced into the melt. Subsequently, the position of the interface between liquidus and solidus is determined from the measured temperatures by means of interpolation, and the withdrawal speed of the casting is controlled such that during the withdrawal of the casting, the interface is always located in a desired area of the insulation 10 which slightly above the cooling head 14. For this purpose, it is advantageous that the temperature of the heating for heating up the mold be stored as a parameter in a computer over the distance covered by the mold and/or the respective position of the mold in the vacuum furnace. This heating temperature profile as a function of the respective position of the mold in the vacuum furnace in connection with the withdrawal speed of the mold is then available for further casting cycles in connection with the withdrawal speed profile as a reproducible value for subsequent casting cycles.

REFERENCES:
patent: 3897815 (1975-08-01), Smashey
patent: 3931847 (1976-01-01), Terkelsen
patent: 4307769 (1981-12-01), Hauser et al.
patent: 4522247 (1985-06-01), Lingarean et al.
patent: 4995733 (1991-02-01), Thomas et al.

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