LAUSR

By merging the process of casting and rolling,1) twin-roll strip casting (TRC) has been proved to be an efficient and energy-saving technology.2) There are mainly two types of TRC, vertical and horizontal. However, both types of TRC possess their own disadvantages. The fluctuation of molten pool during vertical-type twin roll casting and the complexity of adjustment and maintenance in horizontal twin roll casting remains major problems. To avoid these problems, our laboratory proposed a top side-pouring twin-roll caster which was composed of unequal-diameter rolls.3) During the process of the top side-pouring twin-roll casting (TSTRC), only a fraction of a second is taken for the metal melt to transform into solid strip, demanding higher cooling power of rolls compared to the common TRC. Meanwhile the difference of both diameter and structure of two rolls makes it difficult to balance the cooling power of roll surfaces, which leads to a lot of problems during production. Indeed, the casting roll plays an important part in realizing the solidification and formation of metal melt during the TSTRC process. The thermal field of the roll affects the shape of cast strip through its effect on thermal crowning of the roll. Meanwhile the averNumerical Simulation of Thermal Field of Work Roll during Top Side-pouring Twin-roll Casting of Steel