目前,浇铸矩形和方形断面的板坯、方坯和扁坯已是一般的连铸技术水平。相反,在连铸机上浇铸圆坯还是例外。圆坯浇铸较少采用的一个原因乃是在结晶器内圆形断面的冷却情况较为困难。圆形连铸坯对于在斜轧机上轧制钢管,加工锻件和挤压件以及在轮箍轧机上轧制轮箍是最佳的断面形状。表1列出了全世界的圆坯连铸机。 Currently, the casting of rectangular and square cross-section of the slab, billet and slab is a general level of continuous casting technology. In contrast, casting billet on the caster is an exception. One reason that round billet casting is less commonly used is that it is more difficult to cool the circular cross-section within the mold. Round billet is the best cross-sectional shape for rolling steel tubes, forging forgings and extrusions on a cross-rolling mill and for rolling the tire on a rolling mill. Table 1 lists the round billet caster around the world.