ISSN 2594-5300
51° Seminário de Fusão, Refino e Solidificação de Metais — vol. 51, num.51 (2022)
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Abstract
Companhia Siderúrgica do Pecém, after two years of startup, faced the great challenge of supplying Ultra Low Carbon steel slabs to be rolled in the European market. The level of quality would require a higher level of technological capacity to supply this market. For this, cleanliness measurement techniques were developed and validated and the fundamentals of metallurgical phenomena and operational procedures that impact the cleanliness of Ultra Low Carbon steels with exposed and unexposed automotive application were studied to obtain a reduced sliver index in the product.
The challenges consisted of defining refining and casting process parameters that would guarantee optimal levels of cleanliness based on the sliver results in the final product; and to develop cleanliness measurement methods that would allow for the continuous development of CSP refining processes.
The result of this development positioned CSP as a reference in quality, with cleanliness levels 50% better than the best rolling company supplier until then, and levels equivalent to the slabs of the rolling mill company itself, which is one of the world references in this product line.
The conceptual objectives stand out, such as the development of cleanliness assessment techniques that will allow CSP, a slab producer, to anticipate and act on steel projects to optimize quality according to the customer's needs; from the definition of correlations between sliver, total oxygen and the level of inclusions obtained in product; in addition to process mapping and knowledge creation for the organization.
Companhia Siderúrgica do Pecém, after two years of startup, faced the great challenge of supplying Ultra Low Carbon steel slabs to be rolled in the European market. The level of quality would require a higher level of technological capacity to supply this market. For this, cleanliness measurement techniques were developed and validated and the fundamentals of metallurgical phenomena and operational procedures that impact the cleanliness of Ultra Low Carbon steels with exposed and unexposed automotive application were studied to obtain a reduced sliver index in the product.
The challenges consisted of defining refining and casting process parameters that would guarantee optimal levels of cleanliness based on the sliver results in the final product; and to develop cleanliness measurement methods that would allow for the continuous development of CSP refining processes.
The result of this development positioned CSP as a reference in quality, with cleanliness levels 50% better than the best rolling company supplier until then, and levels equivalent to the slabs of the rolling mill company itself, which is one of the world references in this product line.
The conceptual objectives stand out, such as the development of cleanliness assessment techniques that will allow CSP, a slab producer, to anticipate and act on steel projects to optimize quality according to the customer's needs; from the definition of correlations between sliver, total oxygen and the level of inclusions obtained in product; in addition to process mapping and knowledge creation for the organization.
Keywords
Ultra low carbon, Automotive steel, Steel cleanliness
Ultra low carbon, Automotive steel, Steel cleanliness
How to refer
Carneiro, Carlos André Ruy;
Leal, João Filipe Cavalcanti;
Gouveia Filho, Marcos Daniel;
Sousa, Ana Larissa Pereira de;
Klug, Jeferson L..
CLEANLINESS DEVELOPMET OF ULTRA LOW CARBON GRADES FOR AUTOMOTIVE APPLICATION
,
p. 993-1007.
In: 51° Seminário de Fusão, Refino e Solidificação de Metais,
São Paulo,
2022.
ISSN: 2594-5300
, DOI 10.5151/2594-5300-35085
