Ce/Ce-Zr夹杂物诱导高强船板钢中针状铁素体形核行为的研究  

Research on IAF nucleation behavior induced by Ce/Ce-Zr inclusion in high strength steel plate for shipbuilding

作　　者：孟祥海[1,2] 王伟 毕胜 李运刚 Meng Xianghai;Wang Wei;Bi Sheng;Li Yungang(Tangshan Polytechnic College,Tangshan 063299,Chebei,China;College of Metallurgy and Energy,North China University of Science and Technology,Tangshan 063210,Hebei,China;Department of Mechanical and Electrical Engineering,Tangshan College,Tangshan 063000,Hebei,China)

机构地区：[1]唐山工业职业技术学院,河北唐山063299 [2]华北理工大学冶金与能源学院,河北唐山063210 [3]唐山学院机电工程系,河北唐山063000

出　　处：《钢铁钒钛》2022年第2期146-151,共6页Iron Steel Vanadium Titanium

基　　金：国家自然科学基金(编号:51974129);河北省教育厅青年基金项目(编号:QN2021316);唐山市科技计划资助项目(编号:20130228b)。

摘　　要：研究了FH40高强船板钢经稀土合金化处理后夹杂物诱发铁素体的变化行为,利用扫描电子显微镜(SEM)和能量衍射谱(EDS)等手段观察分析了钢中稀土夹杂物的形貌特征以及诱发形成IAF的行为机制。研究结果表明:经Ce或Ce-Zr复合处理后,稀土复合夹杂物形状得到球化,且均能诱发针状铁素体形成;单独Ce处理形成的Al-Ce-O+MnS夹杂物诱导针状铁素体行为可用贫Mn区机制和惰性基底机理解释,而Ce-Zr复合处理形成的CeZr-O+MnS夹杂物诱导针状铁素体行为只能用贫锰区机制解释。In this paper, the evolution behavior of ferrite induced by inclusions in FH40 ship plate steel after rare earth alloying was studied. The morphology characteristics of rare earth inclusions formed in steel and the mechanism of IAF formation were observed and analyzed by means of scanning electron microscope(SEM) and energy diffraction spectrum(EDS). The results show that the shape of the rare earth composite inclusions is spheroidized after Ce or Ce-Zr composite treatment, and both inclusions can induce the formation of IAF. Al-Ce-O+MnS inclusions formed by Ce can be explained by Mn-poor zone mechanism and inert substrate mechanism, while Ce-Zr-O+MnS inclusions formed by Ce-Zr combined treatment can only be explained by Mn-poor zone mechanism.

关 键 词：FH40船板钢 稀土处理 夹杂物 形核机制 针状铁素体 

分 类 号：TF76[冶金工程—钢铁冶金] TF704.2