清理坯轧制宽厚板平面形状控制研究

Research on Plan View Pattern Control of Heavy Plate Rolled with Cleaned Billet

基于有限元分析软件MARC,以某钢厂生产现场的实际轧制规程为基础建立仿真模型,对宽厚板非清理坯及清理坯的平面形状变化进行仿真分析,研究板坯清理方式对板坯平面形状的影响规律,通过修正清理坯的板面形状控制参数以改善地坯平面形状。研究结果表明:根据清理方式对板坯断面形状的影响,将清理模式分为表面局部清理和表面角部清理两个类别,其中表面局部扒皮清理对轧后板坯的切头切尾影响较大;在展宽MAS轧制时,对于表面局部扒皮清理的板坯,需将挖坑深度增加1 mm;而对于表面角部清理的板坯,挖坑深度增加0.5 mm即可获得理想的板面形状。

With finite element analysis software MARC,a simulation model was established for the actual rolling schedule data of a steel plant,and changes of plan-view shapes of heavy plate rolled with non-cleaned and cleaned billets were simulated.Influence of the cleaning mode of the billet on the plan-view shape was analyzed.The plan-view shape was improved by modifying the controlling parameters of the cleaned billet.Results show that according to the influence of different cleaning modes,the cleaning mode can be divided into two groups:partial surface cleaning and corner cleaning.It was found that the partial surface cleaning on the billet has a higher impact on the shearing displacement of the plate’s head and tail.So,to obtain an ideal plan-view shape,the depth of digging in the broadening MAS(Mizushima automatic plan view pattern system)rolling pass should be increased by1mm for the partial surface cleaned billet and0.5mm for the corner cleaned billet.