摘要
为探究不同种类、不同添加量脱氧元素对Q355B钢中夹杂物形态、成分和分布的影响,使用真空感应熔炼方法,熔化并精炼了Ti、Zr、Mg和Ce元素单脱氧Q355B钢。采用光谱分析仪、扫描电镜、能谱仪和图像分析仪,观察并分析了不同元素含量下脱氧钢中典型夹杂物的成分及形态特征。结果表明:脱氧元素的添加会促进Q355B钢中MnS以复合夹杂物的形式存在,Ti脱氧钢中会形成MnS+TiN/Ti-O/Al-Si-O复合夹杂,Zr脱氧钢中会形成MnS+ZrO_(2)复合夹杂,Mg脱氧钢中会形成MnS+Al-Mg-O复合夹杂,Ce脱氧钢中会形成MnS+Ce_(2)O_(3)复合夹杂。合理控制脱氧元素的添加量(质量分数)可以获得较好的夹杂物调控效果。Ti或Ce的氧化物对于MnS夹杂物细化效果较好,而添加过多的Zr或Mg易引起ZrO_(2)的聚集或形成MgO+SiO_(2)+MnO复合夹杂物,从而导致粗大夹杂物的形成。此外,初步确定了Q355B钢采用单脱氧元素时合理的元素添加量范围,0.010%Ti、0.0052%~0.0088%Zr、0.0032%Mg以及0.0071%~0.0088%Ce更有利于Q355B钢中夹杂物尺寸的稳定和显微组织的细化。
To explore the influence of different types and additive amounts of alloy elements on the morphology,composition,and distribution of inclusions in Q355B steel,different amounts of elements(Ti,Zr,Mg,and Ce)were added individually employing the method of vacuum induction melting.Spectral analyzer,scanning electron microscope,energy dispersive spectrometer,and image analyzer were used to observe and analyze the composition and morphological characteristics of typical inclusions in Q355B deoxidized steels.The results indicate that the addition of deoxidizing elements promotes the presence of MnS in Q355B steel in the form of composite inclusions.MnS+TiN/Ti-O/Al-Si-O,MnS+ZrO_(2),MnS+Al-Mg-O and MnS+Ce_(2)O_(3) were formed in Ti-,Zr-,Mg-and Cedeoxidized steels,respectively.Proper control of the amount(mass fraction)of deoxidizing elements can achieve better control of inclusions.Oxides of Ti or Ce have a better refinement effect on the size of MnS inclusions,while excessive amounts of Zr or Mg can lead to the aggregation of ZrO_(2) or the formation of MgO+SiO_(2)+MnO composite inclusions,resulting in the formation of coarse inclusions.Additionally,the reasonable range of elemental addition for Q355B steel when using single deoxidizing elements is preliminarily determined.0.010%Ti,0.0052%-0.0088%Zr,0.0032%Mg,and 0.0071%-0.0088%Ce are more conducive to the stability of inclusion size as well as the microstructure refinement in Q355B steel.
作者
张向军
李天瑞
吴文平
杨永
陈志强
徐勇
卢勇
ZHANG Xiangjun;LI Tianrui;WU Wenping;YANG Yong;CHEN Zhiqiang;XU Yong;LU Yong(MCC Huatian Engineering&Technology Corporation,Nanjing 210019,China;School of Metallurgical Engineering,Anhui University of Technology,Ma'anshan 243000,China)
出处
《真空》
2025年第2期77-85,共9页
Vacuum
基金
中冶集团“181”计划项目
国家自然科学基金项目(52301028)
安徽省教育厅高校科研项目(2022AH050333)
安徽工业大学青年基金项目(QZ202102)。
作者简介
张向军(1989-),男,甘肃省陇西县人,博士,高级工程师;通讯作者:杨永,讲师,硕导。
