An innovative process of clad teeming for preparing slab ingot
作者机构：School of Materials and MetallurgyUniversity of Science and Technology LiaoningAnshan 114051LiaoningChina Iron and Steel Research Institutes of Ansteel Group CorporationAnshan 114001LiaoningChina
出 版 物：《Journal of Iron and Steel Research International》 (Journal of Iron and Steel Research, International)
年 卷 期：2022年第29卷第12期
页 面：2006-2015页
核心收录：
学科分类：080602[工学-钢铁冶金] 08[工学] 0806[工学-冶金工程]
基 金：This project was supported by National Natural Science Foundation of China(Grant Nos.51974156 and 51974153) Key Laboratory of Sea Industry Steel Ansteel(Grant No.SKLMEA-USTL-201702)
主 题：Clad teeming Steel ingot Grain refinement Interface Cold core Interfacial mechanical property
摘 要：An innovative process of clad teeming was proposed to prepare slab ingot,which featured a built-in cold core to inhibit solidification defects.A 20-kg clad ingot was prepared in the experiment,using a volume ratio of solid core to molten steel of 1:13 and a preheating temperature of cold core of 573 *** microstructures of the clad ingot were analyzed by comparing with a reference ingot without cold *** morphologies and mechanical properties of the clad ingot were studied before and after hot *** effect of cold core on heat transfer and nucleation during the solidification in clad ingot was *** show that the solidification microstructures in the clad ingot are refined and homogenized *** grain size in the center of the reference ingot is 2–3 times greater than that of clad ingot,and there is almost no columnar grain in the clad *** interfacial shear strength reaches 318 MPa,which shows excellent metallurgical bonding at the interface of cold core and molten *** defects at the interface are eliminated,and interfacial shear strength reaches 426 MPa after hot rolling with a 68.4%total reduction *** experiment and analysis of this process are expected to provide a new idea to prepare large ingots with refinement and homogeneity at a low cost.
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