HRB500E钢中第二相VC的异质形核分析与晶粒细化  

Heterogeneous Nucleation Analysis and Grain Refinement of Second Phase VC inHRB500E Steel

作　　者：陈龙海 李长荣[1,2] 黎志英 李正嵩[3] 刘占林 CHEN Longhai;LI Changrong;LI Zhiying;LI Zhengsong;LIU Zhanlin(College of Materials and Metallurgy,Guizhou University,Guiyang 550025,China;Guizhou Province Key Laboratory for Metallurgical Engineering and Process Energy Saving,Guiyang 550025,China;Shougang Shuicheng Iron and Steel(Group)Co.,Ltd.,Liupanshui 553000,China)

机构地区：[1]贵州大学材料与冶金学院,贵阳550025 [2]贵州省冶金工程与过程节能重点实验室,贵阳550025 [3]首钢水城钢铁(集团)有限责任公司,六盘水553000

出　　处：《材料导报》2020年第S01期436-439,共4页Materials Reports

基　　金：国家自然科学基金(51864013);黔科合平台人才([2018]5781号)。

摘　　要：钢液凝固时,碳化钒作为钢液中铁素体或奥氏体的形核基底相,促进了钢液的非均质形核,并且起到细化凝固组织晶粒的作用。基于二维错配度理论计算碳化钒为基底的化合物对钢液非均匀形核能力的促进作用,通过热力学计算出碳化钒在不同温度的固溶量,采用扫描电子显微镜(SEM)对金属组织进行分析,验证了以碳化钒为基底的化合物对钢液凝固组织的细化作用。Vanadium carbide acts as the nucleation base phase of ferrite or austenite in molten steel during solidification,which promotes the heteroge-neous nucleation of molten steel and refines the grain size of solidified structure.Based on the two-dimensional mismatch theory,the promotion of vanadium carbide compounds on the non-uniform nucleation ability of molten steel was calculated.The solid solution of vanadium carbide at different temperatures was calculated by thermodynamics.The refinement effect of vanadium carbide compounds on the solidification structure of molten steel was verified by scanning electron microscope(SEM)analysis.

关 键 词：钢液凝固 碳化钒 奥氏体 非均质形核 

分 类 号：TF701[冶金工程—钢铁冶金]