Simulation on Continuous Casting Process. Effects of Casting Conditions on the Depth of Witness Mark.

Abstract

The horizontal continuous casting process is widely used from the economical and operational merits, recently. In the process, an intermittent withdrawal cycle is used to keep the stiffness of the solidifying part of the products. This complicated mode of the withdrawal cycle leaves the interface of the crystal, called the witness mark, on the surface of the products. In order to make the iron slab of good quality, it is necessary to decrease the depth of the witness mark. In this paper, the effects of the casting conditions on the solidification process of a horizontal continuous casting were investigated analytically. Considering the flow of the melted iron due to the withdrawal cycle, the simulation was carried out. The calculation parameters were the inflow iron temperature, the break ring temperature, the mold temperature, the withdrawal speed, the withdrawal frequency and the withdrawal time chart. The effect of the each parameter was estimated in the viewpoint of the growth of the witness mark and the thickness of the solid shell.