连铸轻压下过程极限压下量及工艺参数分析

Analyses of Limit Reduction and Processing Parameters in Soft Reduction Processes of Continuous Casting

针对连铸铸坯在各个扇形段中坯壳厚度、温度场分布变化剧烈的特点,系统地研究铸坯在不同压下区间内极限压下量的变化规律。以A36钢连铸坯为研究对象,建立包括铸坯、铸辊以及它们之间多体接触的三维热力耦合模型,在保证工艺质量的前提下对铸坯的极限压下量、压下区间和分配进行系统研究。结果表明,A36钢铸坯从弧形段第一区段到水平段第十区段全过程的极限压下量范围是3.87~6.96 mm,在凝固末端适宜的压下区段为第8~10段,并且在这些压下区域内压下量均匀分配比较适宜。

In view of the characteristics of drastic changes in shell thickness and temperature field of continuous casting billets in each sector,the variation law of limit reduction of billets in different reduction intervals was studied systematically.Taking A36steel continuous casting billets as the re-search object,a three-dimensional thermodynamic coupling model including billet,casting roller and the multi-body contact between them was established.Under the premise of ensuring the processing quality,the limit reduction,reduction zones and reduction distributions of the casting billets were studied systematically.The results show that the limit reduction of A36steel billets from the first sec-tion of bending section to the tenth section of horizontal section is as 3.87~6.96mm.The suitable re-duction sections at the end of solidification are the 8th~10th sections,and it is suitable to distribute the reduction evenly in these reduction sections.