Fundamental Study and Its Application of Surface Defects of Powder Cast Strands

Synopsis : Simulation experiments using Mould Simulator developed by the authors and plant trials have been carried out to investigate the formation mechanism of oscillation marks and the factors affecting powder consumption rate in continuous casting. Following results were obtained through the experiments. 1) Oscillation marks are formed as a result of interaction between solidified shell and very viscous layer of mould powder at the circumference of molten steel surface in a mould. 2) Depth of oscillation marks increases as the negative strip time of the mould oscillation cycle in-