Process for preparing rimming or semi-killed steel ingots for ro

Details Process for preparing rimming or semi-killed steel ingots for ro Process for preparing rimming or semi-killed steel ingots for ro

1983-03-24

1985-07-02

Goldberg, Howard N.

Metal working

Method of mechanical manufacture

Combined manufacture including applying or shaping of fluent...

B21B 1500

Patent

active

045259178

ABSTRACT:
A process of rolling rimming or semi-killed steel ingots to slabs, comprising removing an ingot from its mold before solidification of the center of the ingot; charging the ingot to a soaking pit and closing the pit; holding the ingot in the pit for the minimum time required to reach a condition wherein more than 85% of the ingot is solidified, the outer rim attains a temperature up to about 525 Fahrenheit degrees cooler than the ingot center and the remainder reaches a temperature at least as high as the desired rolling temperature; and rolling the ingot into a slab. Improved yield, metallurgical quality and minimum energy consumption are achieved.

REFERENCES:
patent: 3753288 (1973-08-01), Orbon, Sr.
"Minimization of Fuel Consumption in Soaking Pits . . . ", Cook et al., AIME, Mar. 28-31, 1982, pp. 122-133.
"Liquid Centre and Hot Centre Rolling of Ingots . . . ", Cook et al., ISA, Oct. 18-21, 1982, pp. 235-249.
"CEM.TM.-Cylindrical Equivalent Model" published by Process Control and Automation Inc., Tech. Report 82-009-1, 1982.

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