| Title |
Shape Control of Non - metallic Inclusions in Al - deoxidized Steel by Calcium treatment |
| Authors |
김경식(K . S . Kim); 심재동(J . D . Shim); 이원재(W . J . Lee); 윤종규(J . 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 |