Assessment of a Simplified Correlation Between Wettability Measurement and Dispersion/Coagulation Potency of Oxide Parti
- PDF / 1,632,406 Bytes
- 9 Pages / 593.972 x 792 pts Page_size
- 97 Downloads / 202 Views
, and PA¨R G. JO¨NSSON
This article seeks to demonstrate a direct and simplified correlation between the measurement of the wettability and the agglomeration potency of the inclusion particles in liquid ferrous alloy. The established methodology has been validated by the agreement between the calculated coagulation coefficient of Al2O3 particles and the experimental data in the open literature. Subsequently, the coagulation coefficient of Al2O3, MgO, and Ti2O3 particles in ferrous alloy melts was evaluated quantitatively by the proposed method using the actual experimental data of contact angle and surface tension. Meanwhile, the effect of the matrix composition has been investigated by comparing the Hamaker constant and coagulation coefficient between Ti2O3/ pure iron and Ti2O3/low-carbon steel systems. It is noted that the change of coagulation coefficient associated with the contact angle is caused by the formation of a new phase at the oxide/metal interface at the high temperature. The present work aims to provide a deep understanding of the connection between inclusion motion behavior in the liquid alloy and the high temperature interfacial phenomenon. https://doi.org/10.1007/s11663-019-01624-x Ó The Author(s) 2019
I.
INTRODUCTION
PHYSICOCHEMICAL aspects focusing on the motion, agglomeration, and detachment behaviors of particles in the liquid or at liquid–gas interface are of great importance in the different fields including metallurgical engineering. The particles can refer to metal droplet, aerosol, colloid particle, nonmetallic inclusion particles in the different engineering fields.[1] Specifically, the agglomeration of inclusion particles in the liquid metal is vital to control the cleanliness of steels.[2,3] In addition, their agglomeration behavior relates to the inclusion size, which is an important factor for inclusion roles as a nucleation site to induce intragranular acicular ferrite nucleation.[4–9] Moreover, there is a concept, inclusion engineering, that deals with the control of the amount, morphology, size distribution, and composition of nonmetallic inclusions formed in the liquid steel during refining and solidification.[10] To better understand the mechanism of inclusion agglomeration KEIJI NAKAJIMA, WANGZHONG MU, and PA¨R G. JO¨NSSON are with the KTH Royal Institute of Technology, Department of Materials Science and Engineering, Brinellva¨gen 23, 100 44 Stockholm, Sweden. Contact e-mail: [email protected] Manuscript submitted December 27, 2019.
METALLURGICAL AND MATERIALS TRANSACTIONS B
behavior, the experimental studies using both in-situ[11–15] and ex-situ[16–19] methodologies have been performed. However, the current in-situ characterization research by high-temperature confocal laser scanning microscope (HT-CLSM) limits the inclusion behavior on the liquid steel surface or named steel–gas interface, which is a much different mechanism with the case of inclusion agglomeration at the bulk of the liquid steel. For the latter case, to the authors’ best knowledge, there is not an available way to characteriz
Data Loading...
