An Analysis of Behavior of Slab during Compression Casting in a Continuous Casting Machine

Abstract

An analysis has been made on a compression casting method which is used to prevent internal cracks of a slab in an unbending zone of a continuous casting machine. To investigate the behavior of a slab during a compression casting, a numerical calculation method was developed. Using this method, stress and strain in a solidified shell of a slab were calculated and the followings became clear: (1) When compressive forces in the casting direction act on a slab in an unbending zone, mutual effect between unbending forces and compressive forces appears and stress and strain on an inner surface of an upper side shell change from tensile to compressive. (2) Compressive forces and temperature of a slab are found to be the primary parameters affecting the effective behavior of the compression casting. From the results of calculations, construction of the machine applying the compression casting method was also discussed about an arrangement of drive and driven rollers, devices for pressing rollers to a slab, prevention of slip between a slab and rollers and controlling method of revolution of drive and driven rollers.