KOROLCZUK-HEJNAK Marta AGH-University of Science and Technology

Spoluautoři MIGAS Piotr, ŚLĘZAK Wojciech

This paper presents the results of the rheological analysis of selected ferrous solutions. In metallurgical processes, gradient of the dynamic viscosity parameter is an important indicator characterizing the behavior of liquid metal in the industrial aggregates. It affects the processes of heat exchange and mass transport occurring in the existing liquid, solid and gaseous phases. Only a small number of high temperature viscosity measurements is available. This is due to the fact that the experiments are difficult to conduct and due to the general assumption that the molten ferrous solutions are a liquid exhibiting similarities to Newtonian liquids body. In general liquid metal processes are affected by dynamic forces. Values of the parameters which could be treated as rheological in those real processes are very difficult to measure therefore the influence of the following factors: time of shearing, force value, force direction and shear rate are neglected. The significance of these dynamic parameters seems to be particularly important in the metal founding and thixoforming process. In this work authors analyzed, from the rheological point of view, chosen types of ferrous solutions. Measurements were taken using a high temperature viscometer FRS1600 in the range of liquidus temperatures as well as above the liquidus for variable shear rates.