Ferrite features in simulated transition zone of EH36 shipbuilding steel submerged arc welded by CaF2-SiO2-MnO fluxes

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外文摘要：Ferrite features in the simulated transition zone welded with CaF2-SiO2-MnO fluxes containing various MnO contents have been investigated.Confocal 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 observed.It has been found that the appearance temperature for ferrite side plate decreases with increasing Mn content in the weld metals caused by MnO content increasing.Meanwhile,growth rates for both ferrite side plate and acicular ferrite are significantly enhanced with a higher Mn content of weld metal.Furthermore,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.％MnO.This phenomenon is believed to be controlled by the O and Mn contents in weld metals synergistically.

外文关键词：

Submerged arc weldingTransition zonePhase transformationMicrostructure

作者：

Ming Zhong、Dong Hu、Da-ming Guo、Somnath Basu、Cong Wang

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作者单位：

Key Laboratory for Ecological Metallurgy of Multimetallic Mineral(Ministry of Education),Northeastern University,Shenyang 110819,Liaoning,China

School of Metallurgy,Northeastern University,Shenyang 110819,Liaoning,China

The State Key Laboratory of Refractories and Metallurgy,Wuhan University of Science and Technology,Wuhan 430081,Hubei,China

Department of Metallurgical Engineering and Materials Science,Indian Institute of Technology Bombay,Mumbai 400076,Maharashtra,India

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基金：

Spring Sunshine Plan(Chunhui)Research Project of Ministry of Education of ChinaState Key Laboratory of Refractories and Metallurgy国家自然科学基金国家自然科学基金国家重点研发计划

项目编号：

HZKY20220437G202206U20A20277521506104942022YFE0123300

出版年：

2024

DOI：

10.1007/s42243-023-01162-6

钢铁研究学报(英文版)

钢铁研究总院

钢铁研究学报(英文版)

CSTPCD

影响因子：0.584

ISSN：1006-706X

年,卷(期)：2024.31(4)