STUDY OF HEAT-TRANSFER IN A CONTINUOUS BILLET CASTING MACHINE

The heat transfer and the process of solidification in a billet caster has been investigated by measurements and by mathematical modelling. Measurements of heat flux were done in the mould and measurements of s trand surface temperatures in the secondary cooling region. Oil and ca sting powder were used as the lubricant. The effect of electromagnetic stirring on the heat transfer in the mould was also studied. Mathemat ical simulations were carried out with a heat transfer model. The main purpose was to get new understanding of the heat extraction from the billets and thereby to learn to control the strand cooling better. A l ot of new information has been achieved.