初始板厚和压下量对热轧复合钢板复合厚度比的影响

通过二辊可逆轧机试验研究了45钢、NM360耐磨钢、310S和316不锈钢,初始复层5.1~15.2 mm板和Q345碳素钢初始基层82.7~90.0 mm板(初始复合厚度比5.40%~15.53%)以及总压下量35%~75%对在1150~1000℃热轧的复合钢板复合厚度比的影响。结果表明,当复层板(316和310S钢)变形抗力大于基层板(Q345钢)时,随压下量增加,钢板复合厚度比增加,并且初始复合厚度比越大,热轧后复合厚度比增加越明显;当复层板(45钢和NM360钢)变形抗力小于基层板(Q345钢)时随压下量增加,钢板复合厚度比减小;拟合的复合厚度比相对压下量的变化率Y与强度差S_d的关系式为:Y=(-0.12±0.17)+(0.068±0.004)S_d。

Effect of Initial Plate Thickness and Reduction on Cladding Ratio of Hot-Rolled Clad Steel Plate

Effect of the initial cladding ratio 5.40%-15.53% with 0.45C steel, NM360 abrasion-resistant steel, 310S and 316 stainless steel 5.1-15.2 mm initial cladding plate and Q345 carbon steel 82.7-90.0 mm initial base plate and the total reduction 35%-75% on cladding ratio of clad steel plate hot-rolled at 1150-1000 ℃ has been tested and studied by using two-high reversing mill. Results show that as the resistance to deformation of cladding plate (316 and 310S steel) is larger than that of base plate ( Q345 steel) , with increasing reduction the cladding ratio of plate increases, and the larger the initial cladding ratio, the increasing cladding ratio of hot-rolled plate more obvious; as the resistance to deformation of cladding plate (0.45C steel and NM360 steel) is smaller than that of base plate ( Q345 steel) , with increasing reduction the hot-rolled plate cladding ratio decreases ; the relation between change rate Y of synthetic relative reduction of cladding ratio and strength difference S_d is Y = (-0.12 ±0.17) + (0.068 ± 0.004) S_d.