|HAMPL Jiří||VŠB - Technická univerzita|
|Spoluautoři VÁLEK Tomáš|
The paper deals with the results of measurements of oxygen activity (aO) in a cast with trackball and laminated graphite. The results were recorded in operating melts in the foundry of centrifugally cast cyllinders of the Vítkovice Steel. The measurements were performed with a newly developed device for measuring of oxygen aktivity in the Celox-Foundry cast irons by HERAEUS – ElectroNite company with a special probe developed for (aO) measuring in cast irons. The changes of oxygen aktivity were recorded in the course of metallurgical processing in an electric induction furnace, before modification and also during the process of protruding of melt after the modification in ladle.