The structural constitution and ionic or molecular nature of the glassy matrix in liquid aluminosilicates are governed mainly by the molar ratio O: (Si + Al), and during the welding process affect its thermodynamic, chemical and physical properties as well as in their interactions with the metal droplet and the weld pool. In aluminosilicate fusion, O2-ion interactions with other substances from the unalloyed flux matrix and filler metals and base are of considerable importance during the formation of the weld metal by submerged arc welding process (SAW). In this study, assessing the relation between the classical basicity index and several optical basicity indices using criteria according to Zhang (BOzh), Duffy and Ingram (BO D) and the proposed in this work by the authors (BO P) and also between the BO P and the molar ratio O: (Si + Al) in each matrix. This provides structural-chemical criteria for the matrices and their metallurgical activity. From a thermodynamic analysis one can determine the oxygen amount in the weld metal, which allow to estimate the possible physical and mechanical properties of itself.
Optical basicity; Flux vitreous matrixes; weld metal oxygen
