Le niveau de charbon est un paramètreprocess important pour la productivité et legraphitage des fours de la batterie.La mesure des hauteurs de chargementest nécessaire pour ajuster les paramètresde l’enfourneuse. La méthode manuelle avecune pige graduée n’est plus acceptable pourl’environnement et les conditionsde travail des opérateurs.Chaque enfourneuse de Dunkerqueest équipée de quatre radars qui permettentdes mesures répétitives en automatiqueavec une précision du millimètre.Malgré les conditions difficiles (chaleur,poussière, gaz…), le radar embarquépermet d’obtenir des mesures fiables.

Blast furnace models are fundamental tools that interpretmany of the phenomena occurring inside the reactor. Theycan be either diagnosis or predictive, but they requireavailable measurements to validate their outputs. One of theroles of the different R&D Labs of the ArcelorMittal Group is todevelop, validate, apply and continuously improve the modelsfor blast furnace operations and analysis. The users' feedbackis one important key to success.

Based on practice, the main factors affecting the process ofEAF with De-P HM charging have been theoretically analyzed,such as using oxygen, the material charging and making slag.Based on the process features of EAF with De-P HM charging,EAF productivity increase was achieved with application of theintegrated control theory on EAF process in Baosteel StainlessSteel Branch.

Good stability of the steel strip is essential in galvanizinglines, especially in the rapid cooling section before the zincbath, where the strip is cooled and excited by high-speedgas jets.
The process parameters and the design have beeninvestigated in order to characterize the strip vibrationsphenomena and to define optimized solutions for improvingthe cooling performances of present and future galvanizinglines while reducing the strip fluttering in the rapid coolingzone as well as in the cooling tower.

Due to recent nickel price volatility, ferritic stainless steels,having no or very low nickel content, can be very interestingto stainless steels users. Ferritic represents only about26% of the total stainless steel production nowadays. Thepaper presents the ferritic stainless steel family: mechanicalproperties of the grade including drawability as well ascorrosion resistance properties. Experimental data of thenewly developed 20% Cr ferritic grade are discussed andcompared to the properties of existing 200 and 300 seriesgrades. High temperature properties of ferritic stainlesssteels designed for exhaust systems are also presented.

An approach is proposed for the evaluation of surface fatiguedamage of hot forming tools that undergo severe thermomechanical loading. Fatigue crack propagation in a hot worktool steel X38CrMoV5-47HRC is investigated using singleedgecracked tension specimens with 3 different thicknesses(2.5, 1, 0.6 mm) and two R-values. The stress intensity factoris evaluated with ABAQUS®. Paris curves are established forthe crack propagation experiments.