Morphology, chemical compositions and size distribution of rare earth oxides in pure iron

Shengjun Zhang Bo Song Xihua Liu Qing Lin and Biyan Wang1) Metallurgy School, University of Science and Technology Beijing, Beijing 100083, China2) Applied Science School, University of Science and Technology Beijing, Beijing 100083, China,2)

摘 要：<正> The pure iron was melted and deoxidized by metallic Al and rare earth elements La, Ce and Y respectively at 1600℃ in a vertical resistance furnace. The morphology, chemical composition and size distribution of the inclusions in deoxidized liquid iron have been investigated by using of SEM and image-analysis techniques. The investigated results show that the deoxidation products in molten iron are complex inclusions of rare earth oxide or A12O3 combined with FeO finely distributed. The proper holding time and rapid cooling rate can make inclusions finer. La, Y and Al are more effective than Ce for obtaining finely distributed inclusions.

关键词：