SP大侧压变形后板坯形状的研究

文章采用数值模拟和物理模拟相结合的方法,研究了SP(Sizing Press)侧压调宽过程中板坯的变形规律、SP侧压变形后板坯形状的特征、不对称变形条件和侧压量对板坯尾部翘曲的影响规律以及板坯形状对后续水平轧制后轧件板形的影响。研究结果表明,SP侧压变形过程中,板坯的变形是不均匀的。侧压后板坯的形状具有板坯头尾呈鱼尾形;横截面呈狗骨状;板坯宽度呈周期性变化,侧面形成压痕,板坯侧面厚度也相应呈周期性变化;垂直方向的不对称变形条件容易造成板坯尾部翘曲;产生尾部翘曲的板坯经过水平道次轧制后,会造成尾部宽度增加;SP侧压后板坯的宽度波动会引起水平轧制后轧件的宽度波动等特征。

Research on the shape of the slab after Sizing Press

Adopting FEM and experimental method,the deformation of the slab during Sizing Press(SP) is analyzed.The characteristics of the slab shape after SP,and the influence of the un-symmetry factor and the width reduction on the warp at the end of the slab are investigated.The influence of the slab shape after SP on the slab shape after rough rolling is discussed.The results show that,the deformation of the slab is un-symmetry during SP;the characteristics of the slab shape after SP are as follows:the head and the end of the slab appear "fish-tail";the cross section of the slab shows "dog bone";the width of the slab is periodical variation,and press marks appear at the side faces of the slab,the thickness of the slab's side is also periodical variation corresponding to the press marks;the end of the slab warps easily for the un-symmetry conditions along the vertical direction;the warp after SP causes the width of the slab end increasing after following rough rolling;and the width fluctuation of the slab after SP causes the width fluctuation of the slab after rough rolling.