Researches Regarding the Influence of Vacuum Parameters on the Efficiency of Gas Removal from the Liquid Steel

Abstract

The presence of gas in steel is a problem in terms of quality, by the way how is influenced steels mechanical and technological characteristics.Current steel making technology allows inclusion of gas content at relatively low value, but under current conditions, it places a great emphasis on the purity of the steel and the superior mechanical and technological properties, secondary treatment is required (ladle metallurgy) and, if possible, even the treatment of liquid steel in vacuum installations. The paper presents the influence of the main parameters of vacuum treatment (treatment duration, high vacuum period) and thermic parameters of steel (input and output temperature of the steel in installation) relative to hydrogen and nitrogen contents from steel for processing on automatic machines. Correlations obtained are presented in Excel and Matlab both the analytical and graphical form.