The Inclusion Study And The Determination Of Aluminum And Insoluble Calcium In Aircraft Steel Samples

The present paper presents the data obtained as a result of the determination of the soluble/insoluble part of Ca and Al and the study of Al and Ca inclusions in aircraft steel samples When analyzing the samples, I used the Spark-Dat method and I analyzed the inclusion with the help of the 21 NEOPHOT Metallographic Microscope. The values for the fractions Al-insol/Al-tot (0,077; 0,411; 0,083; 0,097; 0,400) and Ca-insol/Ca-tot (0,20; 0,14; 0,66; 0,48; 0.97), prove the fact that in the steel elaboration, conditions have been created for an improper behavior at continuous pouring. The values of the account CaO/Al2O3 (0,00108; 0,00500; 0,02040; 0,02222; 0,18055) emphasize the fact that the steel from the samples forms the solid alumina at the temperatures of melted steel.