A coupled model of TiN inclusion growth in GCr15SiMn during solidification in the electroslag remelting process

作     者：Liang Yang Guo-guang Cheng Shi-jian Li Min Zhao Gui-ping Feng Tao Li 

作者机构：State Key Laboratory of Advanced Metallurgy University of Science and Technology Beijing Dongbei Special Steel Group 

出 版 物：《International Journal of Minerals,Metallurgy and Materials》 (矿物冶金与材料学报（英文版）)

年 卷 期：2015年第22卷第12期

页      面：1266-1272页

核心收录：

学科分类：08[工学] 0806[工学-冶金工程] 080601[工学-冶金物理化学] 

基　　金：financially supported by the Key Technology Development of Bearing Steel for Major Equipment (No. 2012AA03A503) 

主　　题：coupled model solidification inclusions bearing steel electroslag remelting 

摘      要：TiN inclusions observed in an ingot produced by electroslag remelting （ESR） are extremely harmful to GCrl5SiMn steel. Therefore, accurate predictions of the growth size of these inclusions during steel solidification are significant for clean ESR ingot production. On the basis of our previous work, a coupled model of solute microsegregation and TiN inclusion growth during solidification has been established. The results demonstrate that compared to a non-coupled model, the coupled model predictions of the size of TiN inclusions are in good agreement with experimental results using scanning electron microscopy with energy disperse spectroscopy （SEM-EDS）. Because of high cooling rate, the sizes of TiN inclusions in the edge area of the ingots are relatively small compared to the sizes in the center area. During the ESR process, controlling the content of Ti in the steel is a feasible and effective method of decreasing the sizes of TiN inclusions.