Treatment for improving the castability of aluminum killed continuously cast steel
The present invention relates to the continuous casting of steel. It relates more particularly to preventing the casting nozzle from being blocked when casting a slab or strip made of killed steel, especially low-carbon steel or ultralow-carbon steel (called ULC steel or IFS). According to this trea...
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| Main Authors | , , |
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| Format | Patent |
| Language | English |
| Published |
03.02.2004
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| Online Access | Get full text |
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| Summary: | The present invention relates to the continuous casting of steel. It relates more particularly to preventing the casting nozzle from being blocked when casting a slab or strip made of killed steel, especially low-carbon steel or ultralow-carbon steel (called ULC steel or IFS).
According to this treatment, calcium is added to ultra low molten steel or low carbon which is aluminum killed (or in the course of being killed) in order to form non-metallic deoxidation inclusions that have a melting point which is below the casting temperature; the molten metal is maintained in the chain of treatment ranging from the ladle refining installation to the copper mold with a low minimum low magnesium content of approximately 2 ppm. The inventive method increases the scope of fusibility of the inclusionary population of steels, thereby improving the castability of high aluminum-killed ultra low carbon grades without the need for argon bubbling. |
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