由国内某厂提供的320mm的有缺陷连铸坯,试样尺寸是160mm×100mm×180mm,在东北大学轧制技术及连轧自动化国家重点实验室轧制。模拟比为2.0,按平均压下率小、中、大,将试件分成3组,每组轧成3种不同厚度的成品板,其中中等平均压下率是按缺陷临界压合条件制定,既粗轧道次满足动态临界几何条件l/h珔=0.53。轧制后经超声波检验合格,验证了缺陷压合的临界条件。 320mm from the domestic plant provided a defective slab, the sample size is 160mm × 100mm × 180mm, at the Northeastern University rolling mill rolling and Automation State Key Laboratory of rolling. The simulation ratio is 2.0, the average reduction rate is small, medium and large, the specimens are divided into three groups, each rolling into three different thickness of the finished board, of which the average reduction rate is based on the critical compression conditions, Both rough rolling passes satisfy the dynamic critical geometry l / h 珔 = 0.53. Passing the ultrasonic test after rolling confirmed the critical conditions of the defect lamination.