Abstract
The Donetsk Polytechnic Institute and plant tested a technology for protecting metal in continuous-caster molds with boron-bearing slag materials. The steel was deoxidized with 65% ferrosilicon, ferromanganese, metallic aluminum, and titanium. Powdered boron-bearing materials included sodium borate or datolite concentrate and one of the following agents: aluminum, calcium-silicon, and cerium-bearing alloy. When the steel was teemed, one of the molds was protected by an amorphous graphite slag-forming mixture and datolite concentrate. It was found that the number of defective plates was reduced and the strength and ductility properties and impact work were at least as high as for steel teemed under graphite alone.
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