材料科学与工程学报2017，Vol.35Issue(3)：489-493,484,6.DOI:10.14136/j.cnki.issn1673-2812.2017.03.028
微镁处理对铸态低碳钢中夹杂物和组织的影响
Effect of Trace Magnesium Treatment on Inclusion and Microstructure of Cast Low Carbon Steel
摘要
Abstract
Trace magnesium treatment was carried out for low carbon steel under laboratory conditions.The features of inclusion and microstructure of the material were studied through Scanning Electron microscope,Energy Dispersive Spectrometer (SEM-EDS) and optical microscope,and compared with nontreated sample.It is found that magnesium treatment leads to the inclusion evolution from Al2O3 to Mg-A1-O complex.Moreover,for Mg-treated sample,the average size of the inclusion is reduced,and the corresponding number of inclusion per unit volume is greatly increased.After etching,the typical microstructure of intragranular acicular ferrites is observed in Mg-treated sample,which is due to the nucleation effect induced by Mg-A1-O complex inclusions.Line scanning analysis of EDS hints that Mn-depletion zone (MDZ) exists in steel matrix,where is adjacent to the complex inclusion.Based on theoretical analysis,this phenomenon can be explained by the absorption of Mn due to the magnesium vacancy in MgAl2O4,and this MDZ promotes the nucleation of intragranular acicular ferrite.关键词
氧化物冶金/镁铝复合夹杂物/晶内铁素体Key words
oxide metallurgy/Mg-Al complex inclusion/intra-granular ferrite分类
矿业与冶金引用本文复制引用
田祥省,祝龙飞,林浩,孔辉..微镁处理对铸态低碳钢中夹杂物和组织的影响[J].材料科学与工程学报,2017,35(3):489-493,484,6.基金项目
国家自然科学基金资助项目(51474001,51304001),住房和城乡建设部科学技术资助项目(2012-K4-41),高校学科(专业)拔尖人才重点资助项目(gxbjZD2016042) （51474001,51304001）
