Abstract
Non-metallic inclusions especially oxides are detrimental to the quality of ferritic stainless steel products. Accurate characterization on inclusions is conducive to further research on the inclusion control. There are some disadvantages in traditional 2D or 3D inclusion detection methods, tomography is thus employed to characterize inclusions in steel in the current work. Oxide inclusions in the slab of Ti bearing ferritic stainless steel were characterized 3 dimensionally using high resolution synchrotron micro computed tomography (MicroCT), and the variations of quantity, volume and size of oxide inclusions along the thickness of continuous casting slab were analyzed quantitatively and compared with the 2D results detected by ASPEX, an automated scanning SEM. It was found that non-destructive detection could be well done by Micro-CT more accurately. The detected oxides by Micro-CT were mainly global, and the number of inclusions decreased with increasing size. In general, the number density and volume fraction of oxides were largest in the center of slab thickness, and decreased with the dis*国家自然科学基金项目51274034, 51334002和51404019资助 收到初稿日期: 2015-04-17,收到修改稿日期: 2015-08-21 作者简介:杨 文,男, 1985年生,讲师 DOI: 10.11900/0412.1961.2015.00226
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