Metal founding – Process – Shaping liquid metal against a forming surface
Patent
1976-05-25
1977-06-21
Shore, Ronald J.
Metal founding
Process
Shaping liquid metal against a forming surface
164 72, 164122, 164125, 249199, B22D 700
Patent
active
040305325
ABSTRACT:
A method for casting steel ingots in molds is provided wherein the upper surface of the ingot is caused to solidify before the interior of the ingot is solidified in order to provide an improved ingot having sound and homogeneous material over all the surfaces of the ingot and a good distribution of segregates throughout the cross section of the ingot. In the improved method, the surface temperature of the upper surface of the ingots is maintained at or near the liquidus temperature of the steel being casted for at least 10 seconds after casting so that the upper surface of the ingot remains fluid to allow slag inclusions to float to the upper surface of the ingot. The upper surface of the ingot is then solidified between 10 seconds and 2 minutes after casting by lowering the surface temperature of the ingot to a temperature at or near the solidus temperature of the steel so that the upper surface of the ingot solidifies before the interior of the ingot is solidified. The upper surface of the ingot is then maintained at or near the solidus temperature so that the upper surface of the ingot will deform plastically and sink downwards when the interior of the ingot solidifies and shrinks.
REFERENCES:
patent: 967830 (1910-08-01), Potter
patent: 1485830 (1924-03-01), Coates
patent: 1491846 (1924-04-01), Coates
patent: 1491881 (1924-04-01), Perry
patent: 1493602 (1924-05-01), Coates
patent: 3472308 (1969-10-01), Lauth
patent: 3526265 (1970-09-01), Nomura et al.
Fagersta AB
Hampilos Gus T.
Shore Ronald J.
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