Reason Analysis and Preventions of Triangular Area Crack and Central Area Crack of SS 400 Continuous Casting Slab

For the quantity of triangular area crack and central area crack of SS400 slab,analysis is carried out on steel composition,degree of superheat,casting gap,etc.Measures are applied to control steel composition,to maintain caster precision,to optimize secondary cooling,etc.Thus the quantity of the triangular area crack and central area crack is controlled effectively and the primary percent of pass increases from 94.5% to 98.7%.