Doctoral Dissertations

Author

Yufeng Wang

Keywords and Phrases

Inclusion entrapment

Abstract

"To improve the efficiency of the continuous casting process and the quality of its products, this dissertation mainly investigated fluid flow related phenomena and inclusion motion in continuous casting. Mathematical simulation was performed for this purpose. Both a slab caster and a billet caster were investigated. In the study of the slab caster, the application of electromagnetic brake field on the slab mold was evaluated. The results indicated that the magnetic force decelerated the high speed steel jet, stabilized the top fluctuation, and prevented the bias flow inside the mold. The other study of this slab caster involved the fluid flow features during the transient casting process. It included casting start, casting speed variation, and temperature fluctuation. Especially for the casting start, the entire process was simulated using the volume of fluid multi phase model and dynamic mesh method. The results indicated the serious entrainment of air during the filling process and large fluctuations in the top surface level at the beginning of dummy bar moving. In the billet caster study, billet samples were collected from an industrial trial. The features of the nonmetallic inclusions were characterized by automated particle analysis and the size and spatial distribution of nonmetallic inclusions were determined. Mathematical models were developed to predict the entrapment locations of inclusions in the solidifying shell and compared to the industrial results. The distribution of inclusions predicted through mathematical modeling in the cross section of billet was in good agreement with the sample measurements"--Abstract, page iii.

Advisor(s)

Zhang, Lifeng (College teacher)

Committee Member(s)

Richards, Von
Tsai, Hai-Lung
Peaslee, Kent D., 1956-2013
Chandrashekhara, K.

Department(s)

Materials Science and Engineering

Degree Name

Ph. D. in Metallurgical Engineering

Sponsor(s)

Missouri University of Science and Technology. Research Board

Publisher

Missouri University of Science and Technology

Publication Date

Fall 2010

Journal article titles appearing in thesis/dissertation

  • Fluid flow related transport phenomena in steel slab continuous casting strands under electromagnetic brake
  • Study on transient fluid flow phenomena during continuous casting
  • Solidification modeling and inclusion entrapment during continuous casting
  • Inclusion observation in steel samples during billet continuous casting

Pagination

xii, 155 pages

Note about bibliography

Includes bibliographical references (pages 137-154).

Rights

© 2010 Yufeng Wang, All rights reserved.

Document Type

Dissertation - Restricted Access

File Type

text

Language

English

Library of Congress Subject Headings

Continuous casting -- Mathematical models
Magnetic brakes
Unsteady flow (Fluid dynamics)

Thesis Number

T 9707

Print OCLC #

747615823

Electronic OCLC #

909401401

Link to Catalog Record

Electronic access to the full-text of this document is restricted to Missouri S&T users. Otherwise, request this publication directly from Missouri S&T Library or contact your local library.

http://laurel.lso.missouri.edu/record=b8333616~S5

Share

 
COinS