Ferrite features in simulated transition zone of EH36 shipbuilding steel submerged arc welded by CaF_(2)-SiO_(2)-MnO fluxes

作     者：Ming Zhong Dong Hu Da-ming Guo Somnath Basu Cong Wang Ming Zhong;Dong Hu;Da-ming Guo;Somnath Basu;Cong Wang

作者机构：Key Laboratory for Ecological Metallurgy of Multimetallic Mineral(Ministry of Education)Northeastern UniversityShenyang 110819LiaoningChina School of MetallurgyNortheastern UniversityShenyang 110819LiaoningChina The State Key Laboratory of Refractories and MetallurgyWuhan University of Science and TechnologyWuhan 430081HubeiChina Department of Metallurgical Engineering and Materials ScienceIndian Institute of Technology BombayMumbai 400076MaharashtraIndia 

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4期

页      面：790-796页

核心收录：

学科分类：0806[工学-冶金工程] 08[工学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 

基　　金：the Spring Sunshine Plan(Chunhui)Research Project of Ministry of Education of China(Grant No.HZKY20220437) the State Key Laboratory of Refractories and Metallurgy(Grant No.G202206) the National Natural Science FoundationofChina(Grant Nos.U20A20277 and 52150610494) the National Key Research and Development Program of China(Grant No.2022YFE0123300) 

主　　题：Submerged arc welding Transition zone Phase transformation Microstructure 

摘      要：Ferrite features in the simulated transition zone welded with CaF_(2)-SiO_(2)-MnO fluxes containing various MnO contents have been *** laser scanning microscopy has been applied to simulate the thermal cycling of the transition zone and the phase transformations during cooling have been in-situ *** has been found that the appearance temperature for ferrite side plate decreases with increasing Mn content in the weld metals caused by MnO content ***,growth rates for both ferrite side plate and acicular ferrite are significantly enhanced with a higher Mn content of weld ***,from the statistical fractions of salient microstructures,for all samples,the acicular ferrite,grain boundary ferrite,and polygonal ferrite take over more than 90%.It has also been demonstrated that with the increase in Mn content,the ferrite side plate fraction increases slightly from 5%to 10%and the acicular ferrite fraction shows a tendency of first increasing and then decreasing,which experiences the maximum with the flux containing 30 wt.%*** phenomenon is believed to be controlled by the O and Mn contents in weld metals synergistically.