Effect of cooling method on TiN precipitation behavior of high-titanium high-strength steel during solidification

作     者：Xue-jian Zhang Guang-wei Yang Yong Wan Yong-hong Wen Chuan-sheng Tang Ming-qi Liu Li-jie Tian Xue-jian Zhang;Guang-wei Yang;Yong Wan;Yong-hong Wen;Chuan-sheng Tang;Ming-qi Liu;Li-jie Tian

作者机构：Key Laboratory of Metallurgical Emission Reduction and Resources RecyclingAnhui University of TechnologyMa'anshan 243002AnhuiChina School of Metallurgical EngineeringAnhui University of TechnologyMa'anshan 243002AnhuiChina Baosteel Central Research InstituteBaoshan Iron and Steel Co.Ltd.Shanghai 201999China 

出 版 物：《Journal of Iron and Steel Research International》 (钢铁研究学报（英文版）)

年 卷 期：2024年第31卷第7期

页      面：1692-1703页

核心收录：

学科分类：080602[工学-钢铁冶金] 0817[工学-化学工程与技术] 0806[工学-冶金工程] 080103[工学-流体力学] 08[工学] 0807[工学-动力工程及工程热物理] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0703[理学-化学] 0701[理学-数学] 0702[理学-物理学] 0801[工学-力学（可授工学、理学学位）] 

基　　金：supported by Baoshan Iron and Steel Co. Ltd. (Grant No.RH2100003354) 

主　　题：High-titanium steel Cooling method TiN Thermodynamics Kinetics 

摘      要：Metallographic microscopy,scanning electron microscopy and TiN growth thermodynamic and kinetic equations were used to investigate the morphology,quantity,and size of TiN in the center of high-titanium high-strength steels under different solidification cooling *** results showed that TiN in the center of the experimental steels mainly existed in three forms:single,composite(Al2O3-TiN),and multi-particle *** began precipitating at around 1497℃(solidification fraction of 0.74).From the end of melting to solidification for 180 s,the cooling rates in the center of the experimental steels for furnace cooling,air cooling,refractory mold cooling,and cast iron mold cooling tended to stabilize at 0.17,0.93,1.65,and 2.15℃/s,*** size of TiN in the center of the experimental steel cooled using furnace cooling was mainly concentrated in the 5-15 pm *** contrast,the size of TiN in the center of the experimental steels cooled using air cooling,refractory mold cooling,and cast iron mold cooling were mainly concentrated in the 1-5 pm *** addition,their density of TiN in the center of the experimental steels is signif-icantly higher than that of the furnace-cooled experimental *** and kinetic precipitation models of TiN established predicted the growth size of TiN in a high-titanium high-strength steel when the solidification cooling rates are not below 0.93℃/s.