Effects of Compressive Stress on Internal Crack Formation of Continuously-cast Slabs

Compression-casting where a cast slab is straightened under compressive stress along cast direction has been successfully applied to the conventional continuous casters, minimizing internal cracks. In a rotary type continuous caster, a cast slab is to be straightened just after leaning the mold, when shell thickness is small. In order to study effects of compressive force on internal crack formation of a cast slab of small shell thickness, a static casting experiment was carried out. It was shown that, by applying compressive force to a cast ingot, internal crack formation could be prevented.