Improvement of Surface in CC Slab for Plate and Directly Reheating and Rolling Process without Conditionings

Abstract

The continuous slab caster for plate mill at Keihin works, Nippon kakan has been operating successfully with increased output and improvement of product quality.
As for the surface defects found in continuous casting slab, the causes of the defects were correlated with casting processes and newly adopted operation was proved to give quite fine surface of slab and plate. On the basis of this development, the system of directly reheating and rolling of slab in 40kg/mm² grade steel without conditioning has been adopted since November 1972, with highly excellent results.