Selected Grades of Steel as Rheologically Defined Liquid Bodies

Archives of Metallurgy and Materials

M. Korolczuk-Hejnak¹  P. Migas¹ 

[1] Faculty of Metals Engineering and Industrial Computer Science, Agh University of Science and Technology, 30-059 Kraków, 30 Mickiewicza Av., Poland

关键词: Keywords: rheology;    viscosity;    liquid steel;   

DOI  :  10.2478/v10172-012-0062-z

学科分类：金属与冶金

来源: Akademia Gorniczo-Hutnicza im. Stanislawa Staszica / University of Mining and Metallurgy

【 摘 要 】

In many processes liquid metal is subjected to dynamic forces, e.g. dynamics of the electric arc, dripping of pig iron in a blast furnace in counter current with reducing gas, in a continuous casting process - dynamic phenomena during flow and crystallization. Values of rheological parameters in these real processes are, so far, very difficult to measure. and thus the influence of the dynamics of these factors: liquid shear rate, time of force action, its value and direction are neglected. In this work the authors analyzed, from the rheological point of view, some selected typical types of steel: 90CrV6, DHQ3, 34CrNiMo, produced in an electric arc furnace. Measurements were taken using a high temperature rheometer FRS1600 in the range of liquid and under-liquid temperatures for changing shear rates and different times of shear stress impact on the liquid system. The measured rheological characteristics allowed us to conclude that the investigated steels show relationships between shear rate and time when the liquid steel was under the influence of the dynamic forces.

【 授权许可】

Unknown