Journal of Materials Research and Technology Journal of Materials Research and Technology
J Mater Res Technol 2017;6:50-6 DOI: 10.1016/j.jmrt.2016.05.002
Original Article
Influence of the chemical composition on steel casting performance
Roney Eduardo Linoa,, , , Ângelo Máximo Fernandes Marinsa, Leandro Aparecido Marchia, Jamylle Assis Mendesa, Lucas Vieira Pennaa, Joaquim Gonçalves Costa Netoa, João Henrique Palmer Caldeiraa, André Luiz Vasconcellos da Costa e Silvab
a ArcelorMittal Monlevade, João Monlevade, MG, Brazil
b Escola de Engenharia Industrial Metalúrgica de Volta Redonda (EEIMVR), Universidade Federal Fluminense (UFF), Volta Redonda, RJ, Brazil
Received 27 May 2015, Accepted 03 May 2016
Abstract

Improving the quality of steel and the steelmaking process has been a matter of routine for metallurgical engineers and steelmaking companies in a demanding market for quality products at highly competitive price. The chemical and temperature adjustment are made during the secondary refining process, as well as the inclusion modification required to product quality, and also the demand for castability accuracy. Continuous casting process is the most used solidification casting process, in which the flow of pouring liquid metal through the submerged entry nozzle is assured by the correct temperature and the formation of liquid inclusion in the casting temperature. Thermocalc and CEQCSI were the software used in this work to assess the effect of carbon, silicon and sulphur in the castability window of the aluminium vs calcium phase diagrams. They have proved to be highly suitable and effective and the results showed that the chemical elements used directly affected the position of the castability window of carbon steel. An analysis of a 0.2%C billet sample using Scanning Electron Microscopy showed that there is a great heterogeneity of inclusions in aluminium-killed and calcium-treated steel.

Keywords
Phase diagram, Thermocalc, Secondary refining, Continuous casting, Calcium treatment
J Mater Res Technol 2017;6:50-6 DOI: 10.1016/j.jmrt.2016.05.002