The influence of vacuum degassing on improving the quality of ship's steels

8th Conference on Material Science and Engineering

工业技术（总论）;材料科学

Potecau, F.^1 ; Istrate, C.^1 ; Potecau, O.^1

Faculty of Engineering, Dunrea de Jos University of Galati, Domneasc Street 47, Galati

RO-800008, Romania^1

关键词: Arcelor;    Continuous casting machines;    Ladle furnaces;    Liquid steels;    Thermal homogenization;    Vacuum degassing;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/485/1/012025/pdf
DOI  :  10.1088/1757-899X/485/1/012025

来源: IOP

【 摘 要 】

In this paper, the authors chose to study the non-alloy steel grade S235JR, developed in the LD (Lintz-Donawitz) converter from Arcelor Mittal Galati plant, considering the quality and purity improving of the produced steel as a main objective. The correlation of mechanical properties with steel purity, as a result of the liquid steel processing to the continuous casting machine (CC) using three cases was followed. In the first case, the final chemical analysis of the liquid steel was taken at the end of the blowing operation without desulphurisation and degassing. In the 2nd case, the final chemical analysis of the liquid steel for CC was taken after the desulphurisation and chemical and thermal homogenization in the Ladle Furnace (LF) installation. In the 3rd case, the final chemical analysis of the liquid steel for CC was taken after the vacuum degassing, i.e after the treatment in the Ruhrstahl Heraeus (RH) installation.