Title

A Review of Defects in Beam Blank Casting and the Measures Proposed for their Elimination

Authorship

Madias, Jorge; Genzano, Cristian; Oropeza, Marco; Vélez, Carlos Moss

Madias, Jorge

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Genzano, Cristian

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Oropeza, Marco

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Vélez, Carlos Moss

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DOI

10.5151/1982-9345-30262

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Abstract

Neste trabalho se leva a cabo uma revisão da literatura sobre defeitos em beam blanks. O foco é no mecanismo de formação e as soluções propostas para diminuir sua ocorrência. Os defeitos superficiais incluidos são as trincas longitudinais e transversais, bleeding, pinholes e escória. Os defeitos internos levados em conta são os blowholes, as trincas centrais e as trincas nas pontas das abas. A revisão incluie as técnicas utilizadas para pesquisar os defeitos: caracterização metalográfica, CFD, modelagem termodinâmica e termomecânica, etc. As medidas adotadas estãorelacionadas a mudanças no sistema de lingotamento (por exemplo o design da vâlvula submersa), design do molde, mudanças e regulação do resfriamento secundário, suporte dos veios.

In this paper a thorough review of the literature on defects in beam blanks is carried out. The focus is on the formation mechanism and the solutions proposed to decrease their occurrence. Surface defects included are longitudinal cracks and transverse cracks, bleeding, pinholes and slag entrapment. Internal defects are blowholes and solidification cracks (web and wing end). The review includes the techniques used to investigate the defects: metallographical characterizations, CFD, thermodynamical and thermomechanical modelling, etc. The measures taken have to do with changes in casting system (i.e. SEN design), mold design, secondary cooling modifications and regulation, strand support.

Keywords

Continuous casting, Beam blanks, Defects, Solidification

Solidification