발간논문

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Vol.21, No.6, 548 ~ 558, 1983
Title
Shape Control of Non - metallic Inclusions in Al - deoxidized Steel by Calcium treatment
김경식K . S . Kim, 심재동J . D . Shim, 이원재W . J . Lee, 윤종규J . K . Yoon
Abstract
In order to clarify the shape control mechanism of nonmetallic inclusions in molten steel, the morphology changes of oxide and sulfide inclusions were investigated by Ca treatment in Al-deoxidized steel at 1600℃. The Ca addition of suitableamount into Al-deoxidized steel considerably improved the degree of steel cleanliness because the alumina cluster formed after Al-deoxidization changed to liquid phase calcium-aluminates which float out rapidly from steel bath. And also, when total oxygen content in molten steel was less than about 20ppm, MnS sulfide and Al₂O₃oxide were modified to C type inclusions such as (Ca, Al, Mn) O-(Ca, Mn) S or CaO-Al₂O₃-CaS
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