Identification of the steel viscosity and dynamic yield stress for the numerical modelling of casting simulations in the semi-solid state

• Main Author: Solek K.
• Format: Article
• Language: English
• Published: Polish Academy of Sciences 2017-03-01
• Series: Archives of Metallurgy and Materials
• Subjects: continuous casting of steel; rheological properties; viscosity; thixoforming
• Online Access: http://www.degruyter.com/view/j/amm.2017.62.issue-1/amm-2017-0027/amm-2017-0027.xml?format=INT

Conditions of some casting processes cause flow of both liquid and semi-liquid metal alloys inside the die cavity. Generally, the continuous casting, squeeze casting or thixoforming could be classified as such processes. Design or optimisation of casting technology using numerical simulations requires knowledge of the rheological properties. The main objective of the experimental work, presented in this publication, is an analysis of the viscosity of 1.2080 (X210Cr12) high carbon steel in liquid and semisolid state. The secondary purpose of the experimental work was a development of the viscosity models used in continuous casting and thixoforming simulations. The significant achievement of this particular study was identification of thixotropy phenomenon which occurs not only during thixoforming, but also during magnetohydrodynamic stirring in continuous casting processes.