Abstract: With established calculated spread model for test medium and heavy plate rolling process, the predicted calculation on rolling load for steel Q345 (/% : ≤0.20C, ≤1.60Mn, ≤0.55Si) in each rough rolling pass by 10 passes rolling from 210 mm casting slab to 48 mm plate has been carried out and the effect of test spread model and Besse spread model on medium and heavy plate rolling load is analyzed. Results show that in medium and heavy plate initial 2 and 3 pass and last 9 and 10 pass the predicted precision of rolling load calculated by test spread model is higher, its relative error is 0. 26% ~0. 68% , in 4 ~ 8 passes the predicted precision of rolling load calculated by Besse spread model is higher, its relative error is 0. 33%~11. 79% , and for the two models all the relative error in first pass is 18. 00%.

摘要： 通过建立的实验中厚板轧制过程宽展计算模型,对Q345钢（/%:≤0.20C,≤1.60Mn,≤0.55Si）中厚板210 mm铸坯经10道次轧成48 mm板的各粗轧道次轧制压力进行预算,分析试验宽展模型和Besse宽展模型对中厚板轧制压力的影响。结果表明,在中厚板轧制开始23道次和终止910道次,实验宽展模型轧制压力预算精度较高,相对误差为0.26%~0.68%;轧制48道次,Besse宽展模型轧制压力预算精度较高,其相埘误差为0.33%~11.79%,两模型第1道次的相对误差均为18.00%。

关键词: Q345钢, 宽展模型, 轧制压力, 中厚板