Boron alloying additive for continuously casting boron steel

Details Boron alloying additive for continuously casting boron steel Boron alloying additive for continuously casting boron steel

1981-06-30

1984-04-03

Dean, R.

Specialized metallurgical processes, compositions for use therei

Processes

Electrothermic processes

75 57, 75 58, 75123B, 75123E, 75123M, 75129, 420417, 420578, 420580, 420581, C21C 700, C22C 3000

Patent

active

044405685

ABSTRACT:
A boron alloying additive for continuous casting of boron steel having the desired hardenability without tundish nozzle blockage. The additive comprises 0.25-3.0% boron, 2.5-40% rare earth metals (RE), 6-60% titanium, and the balance iron. The additive may also contain silicon, calcium, manganese, and zirconium. In the additive the weight ratios of Ti to B and (Ti+RE) to B are 20:1-60:1 and 30:1-90:1, respectively.

REFERENCES:
patent: 3383202 (1968-05-01), Lynch
patent: 3467167 (1969-09-01), Mahin
patent: 3623862 (1971-11-01), Spengler et al.
patent: 4233065 (1980-11-01), Koul
patent: 4251268 (1981-02-01), Willim
Young, W. P. et al., "Casting of Quality Steel at Wisconsin Steel", Open Hearth Proceedings, 1968, pp. 127-132.
Farrell, J. W. et al., "Steel Flow Through Nozzles: Influence of Deoxidizers", Electric Furnace Proceedings, 1971, pp. 31-46.
"An Application Report from Molycorp", publication data about 1970.

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