Baoshan Iron & Steel Co., Ltd.

Rongjun Xu

Yan Wang

Xiao Liu

Guodong Xu

Jian Cui

Zhengjie Fan

Chengbin Li

Junjiang Liu

Xiangchun Liu

Yingchun Wang

Genjie Wan

Qingyu Meng

Yongquan Li

Xiaoming Ruan

Disclosed are a continuous-curvature convex roll for continuously casting a bloom, and a manufacturing method therefore. An outer contour curve of a working portion of a body of the continuous-curvature convex roll contains a first straight-line segment (AB), a first transition curve segment (BC), an intermediate straight-line segment (CD), a second transition curve segment (DE) and a second straight-line segment (EF). The BC, the AB, and the CD have continuous first-order derivatives, continuous second-order derivatives, and continuous curvatures, thus forming a first transition curve with a continuous curvature. The BC and the DE are mirror-symmetrical. The continuous-curvature convex roll can uniformly deform a blank cast in a deformation area, thereby reducing cracks. The transition curve of the convex roll can be reduced, thereby being capable of further reducing a rolling pressure and the withdrawal resistance.

Continuous-curvature convex roll for continuously casting bloom, and manufacturing method therefor

Disclosed is a light reduction method for continuous casting of a bloom plain-barrelled roll-roll combination. The method comprises: firstly obtaining three-dimensional temperature field profile, a two-phase region, solid-phase region thickness, and solid-phase fraction of a billet, determining positions of start and end rolls of the reduction, and setting a reduction amount of each tensioner roll according to the volume shrinkage of the billet; in an interval f=0.9-1.0 of the solid-phase fraction of the billet, performing a heavy reduction working mode; and in an interval f=0.25-0.80 of the solid-phase fraction of the billet, performing a light reduction working mode.

Light reduction method for continuous casting of bloom plain-barrelled roll-roller combination

A water-cooled mold for continuous casting includes two water-cooled wide copper plates arranged opposite to each other in a front and back direction and two water-cooled narrow copper plates arranged opposite to each other in a left and right direction. The upper portion of the cavity of the mold is a sprue area and the lower portion of the cavity is a mold cavity area. The sprue area is gradually narrowed in the casting direction and smoothly transited into the mold cavity, corresponding to the shape of a slab to be cast. The inside surfaces of the water-cooled narrow copper plates are smooth planar surfaces. A portion of the inside surface of the water-cooled wide copper plates in the sprue area is a curved surface and another portion in the mold cavity area is a planar surface. The curved surface and the planar surface portions form a continuous smooth surface.

Water-cooling mold for metal continuous casting

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Shanghai, China

Rongjun Xu