Study on coating uniformity of ultra-high strength steel and optimization control
In order to solve the problem of uneven coating along the width direction of the strip in the production process of ultra-high strength steel,numerical simulation was conducted to study the influence of the strip shape at the air knife position on the uniformity of the coating.The trend of the strip shape at the air knife position with process parameters was analyzed,and corresponding optimization measures were proposed to effectively improve the transverse uniformity of the coating on ultra-high strength steel.The results show that the coating on the upper and lower surfaces of the strip exhibits a symmetrical"C"shape distribution along the width direction,and the weight of the coating at the thicker position can differ by more than one time from that at the thinner position.When the strip passes through the sink roll inside the zinc pot,the asymmetric deformation on the upper and lower surfaces of the strip causes a C-shaped warp at the position of the air knife,resulting in a significant difference in the distance between the upper and lower surfaces of the strip and the air knife,resulting in uneven transresrse coating.The feed rate of different correction rollers and the tension of the cooling tower sec-tion have a significant impact on the strip shape at the air knife position.As the feed rate of the correction roller increases,the strip shape at the air knife position will undergo transverse changes,experiencing four states of"C"shape,straight,"W"shape,and anti"C"shape.By optimizing and correcting the matching between the feed rate of the roll and the tension of the cooling tower,good control of the transverse uniformity of the ultra-high strength steel coating can be achieved.
galvanizingultra-high strength steeluniformity of coatingair-knifestrip shapesink rollfeed rate of correction rollerstension
万方数据
维普
