Çemtaş çelik fabrikasında hidrojen kontrolü.

ÇEMTAŞ Steel Plant produces alloy steels used principally by the automotive industry. For this industry, cleanliness of steel is a crucial criterion. In order to satisfy the demands of customers for cleaner steels and decrease the production losses a master thesis named “Inclusion control at ÇEMTAŞ Steel Plant” was started and completed. According to the results obtained in this study, it was concluded that inclusions are not the only cause of defects in the final product and that hydrogen is another important factor. Steelmaking process was investigated with regards to hydrogen. It was found that steel picks up hydrogen after vacuum degassing and hydrogen content of steel is high just before continuous casting. In order to decrease hydrogen content of steel, some parameters of steelmaking process in ladle treatment like vacuum duration, quantities of additives, and in continuous casting such as tundish and casting powders were studied. As a result, the phases that acts as a source of hydrogen and a proper operation procedure which would decrease hydrogen pick-up were determined.M.S. - Master of Scienc