为满足钢坯连轧机在生产圆坯和方坯的需要，同时提高椭圆和圆孔型的利用率，提出“椭圆圆菱方”孔型系统生产方坯的方法。通过有限元模拟分析和工业试验相结合研究了圆坯和方坯在菱方孔型中的变形规律，对比了方坯进菱孔和圆坯进菱孔轧制时的变形特点。发现圆进菱轧制时轧件的变形更加均匀，轧件的头尾尺寸超差小，菱孔的磨损更加均匀。为合理利用中间圆孔型轧制方坯工艺规程的制定提供了依据。
To meet the demands of producing round and square billet for billet continuous mill and raise the usage of oval and round passes, a new method, “ovalrounddiamondsquare” passes, is utilized to roll square billets. FEM and industrial rolling test are used to study the deformation behavior of square billet and round billet in diamond and square passes. The deformation for different rolling processes is compared. The results show that the deformation for diamond pass roll round billet is more uniform, the dimensional precision of head and tail of workpiece is higher, and the wear of diamond pass is more uniform. The results are helpful to rationally developing rolling procedure for intermediate round pass to roll square billet.
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