ISSN 2594-5327
56º Congresso anual — Vol. 56 , num. 1 (2001)
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The indigenous and exogenous non-metallic inclusions present in steel may affect the castability of the steel and the physical and mechanical properties of the products. The thermodynamics has been proven to be a powerful tool in understanding the formation of inclusions especially during the secondary metallurgy and continuous casting operations. Such model helps in the choice of the best possible slag composition, alloy addition and refractory in order to better control the amount, size, morphology and composition of the inclusions. Laboratory trials are helpful to study phenomena controlled by kinetics such as the crystallisation of liquid oxide inclusions during reheating and their rheology behaviour during hot rolling or inclusions precipitation during the solidification of steel. On site trials can consist in using tracing elements to better determine the origin of inclusions: de-oxidation in the ladle or re-oxidation by gas or refractory during continuous casting. The process and operating conditions which are defined with the help of models and laboratory trials can be adapted to industrial practices. This paper gives an overview of the experimental and theoretical work performed by Usinor R&D in this domain.
The indigenous and exogenous non-metallic inclusions present in steel may affect the castability of the steel and the physical and mechanical properties of the products. The thermodynamics has been proven to be a powerful tool in understanding the formation of inclusions especially during the secondary metallurgy and continuous casting operations. Such model helps in the choice of the best possible slag composition, alloy addition and refractory in order to better control the amount, size, morphology and composition of the inclusions. Laboratory trials are helpful to study phenomena controlled by kinetics such as the crystallisation of liquid oxide inclusions during reheating and their rheology behaviour during hot rolling or inclusions precipitation during the solidification of steel. On site trials can consist in using tracing elements to better determine the origin of inclusions: de-oxidation in the ladle or re-oxidation by gas or refractory during continuous casting. The process and operating conditions which are defined with the help of models and laboratory trials can be adapted to industrial practices. This paper gives an overview of the experimental and theoretical work performed by Usinor R&D in this domain.
Palavras-chave
inclusion, thermodynamics, slag
inclusion, thermodynamics, slag
Como citar
Rocabois, P.; Burty, M.; Lehmann, J.; Lefez, V.; Chatelain, F..
INCLUSION CONTROL IN STEEL: FROM MODELLING, LABORATORY AND ON SITE TRIALS TO INDUSTRIAL APPLICATIONS,
p. 1353-1362.
In: 56º Congresso anual,
Belo Horizonte, Brasil,
2001.
ISSN: 2594-5327, DOI 10.5151/2594-5327-C01214
