Inventors:
John O. Staggers - Downingtown PA
Samir K. Banerji - Norristown PA
Michael J. Lalich - Downingtown PA
Assignee:
Foote Mineral Company - Exton PA
International Classification:
C21C 700
C22C 3000
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.