Fe2SiO4熔化原位观察及组织形貌研究  

Research on In-suit Observation and Microstructure Morphology of Fe2SiO4 in Melting

作　　者：何贝[1] 徐光[1] 袁清[1] 周明星[1] HE Bei, XU Guang, YUAN Qing, ZHOU Mingxing(State Key Laboratory of Refractories and Metallurgy, Key Laboratory for Ferrous Metallurgy and Resources Utilization of Ministry of Education, Wuhan University of Science and Technology, Wuhan 430081, Chin)

机构地区：[1]武汉科技大学耐火与冶金国家重点实验室钢铁冶金及资源利用省部共建教育部重点实验室

出　　处：《热加工工艺》2018年第4期59-61,66,共4页Hot Working Technology

基　　金：国家自然科学基金项目(51274154)

摘　　要：以含硅1.21 wt%低碳钢为研究对象,采用电子背散射扫描（BSED）、能谱仪（EDS）、激光共聚焦显微观察（LSCM）分析了该钢种氧化铁皮的组成、Fe_2Si O_4/Fe O的组织以及Fe_2Si O_4相的熔化。结果表明：低碳钢氧化铁皮主要由三层结构组成,外层主要为Fe_2O_3,中间层以Fe_3O_4和Fe O为主,内层为共晶化合物Fe_2Si O_4/Fe O。此外,Fe O以弥散分布的颗粒状分布在基体Fe_2Si O_4中。同时,原位观察试验验证了Fe_2Si O_4相的理论熔化温度约为1173.9℃,而且,Fe_2Si O_4相的熔化温度与硅元素含量无关。Taking low-carbon steel with 1.21wt%Si as research object, the composition of oxide scale of the steel, themicrostructure of Fe2SiO4/FeO and the melting of Fe2SiO4 phases were researched by backscattered electron detection （BSED）,energy-dispersive spectroscopy （EDS） and laser scanning confocal microscope （LSCM）. The results show that the oxide scaleof low-carbon steel mainly consists of three different layers, i.e., upper layer Fe203, middle layer FeO＋Fe304 and inner layerFeO/Fe2SiO4. Moreover, the FeO phase diffuses in the Fe2SiO4 matrix. In addition, the theoretical melting temperature ofFe2SiO4 phase is tested to be 1173.9 ℃ by in-suit observation. Incidentally, the melting temperature of Fe2SiO4 phase has norelationship with silicon element content.

关 键 词：含硅钢 微观形貌 原位观察 熔化温度 Fe2Si O4/Fe O 

分 类 号：TG131[一般工业技术—材料科学与工程]