Structure and mechanical properties of direct cast-rolled 0.1% c-steel thin slabs

Abstract

The internal quality of strand and finally of the product, in respect of solidification, and crystal structure is favorably influenced by cast-rolling involving reduction of the strand thickness during solidification. This process is simulated using the pivot mold that allows pressing the slab during solidification. The main features of this technology is minimizing the energy consumption in production the flat products, minimizing the CO/CO2 and SO2 emission and improving the internal quality of the final product. This chapter discusses the effect of pressing the slab during solidification on the fineness of the structure and on the mechanical properties of 0.1% carbon steel thin slabs. It is found that the internal quality of the slab is markedly improved by cast rolling during solidification and it depends on the amount of pressure and the time of application. The improvement is obtained by the effect of both increasing the rate of heat extraction from the slab and melt convection carried by pressure application. The degree of refinement depends on the amount of pressure applied on the slab, reduction ratio.