極低酸素鋼中のアルミナ介在物の粒度分布測定法

概要

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A technique for particle size distribution measurement of Al_2O_3 inclusion in ultra low oxygen steel by combination of ultrasonic classification method and centrifugal sedimentation photo-extinction method has been established. The procedure is as follows. (1)The Al_2O_3 inclusion extracted from steel by acid decomposition is classified at over and under 5 μm with ultrasonic filtration. (2)The Al_2O_3 inclusion over 5 μm is weighed. (3)The particle size distribution of Al_2O_3 inclusion under 5 μm is measured automatically with centrifugal sedimentation photo-extinction method. (4)The particle size distribution of Al_2O_3 in steel can be obtained by using from (1) to (3). This technique makes it possible to measure particle size distribution of Al_2O_3 to sub-micron order, and gives instructive information about coalescence and/or floating behavior of Al_2O_3 inclusion during refining prosess.
社団法人日本鉄鋼協会の論文
1991-12-01