After the commissioning of its vacuum degasser (RH-KTB) in 1998, Companhia Siderurgica de Tubarao (CST) started the development of slabs to be applied as high value added products, such as ultralow carbon steel grades (ULC) for automotive applications. For this purpose, it was necessary to promote the development of a quality design system, encompassing all stages of steel manufacturing and slab casting at CST, as well as the steps of finishing rolling and coating. This paper describes the methodology for development of ULC steels at CST together with the company Sollac-Lorraine emphasizing the interchange of technical information aiming the continuous improvement. In this way, the results of the end product surface inspection are correlated with the technical parameters of steel production, including the quality events of steel refining and casting, as well as the slab conditioning.
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机译：自1998年真空脱气机（RH-KTB）投入使用以来，Companhia Siderurgica de Tubarao（CST）开始开发用作高附加值产品的板坯，例如用于汽车应用的超低碳钢牌号（ULC）。为此，有必要促进质量设计体系的发展，其中包括CST的钢制造和板坯铸造的各个阶段以及精轧和涂层的步骤。本文与Sollac-Lorraine公司一起介绍了在CST开发ULC钢的方法，强调了技术信息的交换，旨在不断改进。通过这种方式，最终产品表面检查的结果与钢铁生产的技术参数相关，包括炼钢和铸造的质量事件以及板坯调节。
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