本发明涉及连铸坯高温大压下轧机领域，具体为一种适用于大方坯和矩形坯高温大压工艺下的轧机工作辊的辊型曲线设计，特别应用于大方坯及矩形坯单道次热芯或液芯高温大压下轧制过程。该工作辊将凸缘辊型和箱型孔型进行优化组合，通过计算进行工作辊几何特征的优化设计。复合辊的凸缘宽度系数为0.4～0.8，凸缘高度5～45mm；复合辊的箱型内圆角半径取值10～40mm，箱型侧壁倾斜角90～120度，工作辊直径为500～1000mm。在高温大压下轧制工艺中应用这种复合辊型工作辊后，可以同时突显凸缘辊在厚度和延伸方向上以及箱型孔型在宽度方向上的缩孔压合效果。从而，更大程度地提高单道次高温大压下轧制变形中的铸坯芯部变形渗透性以及中心缩孔三向压合效果。

The invention relates to the field of continuous casting billet high-temperature and high-pressure rolling mill, in particular to a roll profile curve design of rolling mill work roll suitable for bloom and rectangular billet high-temperature and high-pressure process, especially for bloom and rectangular billet single pass hot core or liquid core high-temperature and high-pressure rolling process. The work roll optimizes the combination of flange roll profile and box pass, and optimizes the geometric characteristics of the work roll through calculation. The flange width coefficient of the compound roll is 0.4 ~ 0.8, and the flange height is 5 ~ 45mm; The box fillet radius of the composite roll is 10 ~ 40mm, the inclined angle of the box side wall is 90 ~ 120 degrees, and the diameter of the working roll is 500 ~ 1000mm. The application of the composite roll work roll in the high temperature and high pressure rolling process can highlight the shrinkage and compression effect of the flange roll in the thickness and extension direction and the box pass in the width direction at the same time. Thus, the deformation permeability of billet core and the three-dimensional compression effect of central shrinkage cavity in single pass high temperature and high pressure rolling deformation are improved to a greater extent.