618-0810/02 – Steel Casting and Crystallization (LiaKrO)
| Gurantor department | Department of Metallurgy and Foundry | Credits | 5 |
| Subject guarantor | prof. Ing. Jiří Bažan, CSc. | Subject version guarantor | prof. Ing. Zdeněk Adolf, CSc. |
| Study level | undergraduate or graduate | Requirement | Compulsory |
| Year | 2 | Semester | winter |
| | Study language | Czech |
| Year of introduction | 2004/2005 | Year of cancellation | 2015/2016 |
| Intended for the faculties | FMT | Intended for study types | Follow-up Master |
Subject aims expressed by acquired skills and competences
- student will be able to demonstrate basic regularities proceeding at steel casting, solidification and crystallization of steel. Student will be practice this knowledge due to practical exercises in the Department's lab.
- student will be able to formulate micro-segregate and macro-segregate processes in steel
- student will be able to characterize defects of ingots and continuously cast blanks
- student will be know basic possibilities of simulations of ingots' solidification by the ProCast software and the possibilities of utilization of these simulations in the plant conditions.
- student will gain experience of the structure of the continuous casting steel and ingots and using Baumann fingerprints methods for different conditions, with a focus on heterogeneity, segregation and internal defects in steel samples.
Teaching methods
Lectures
Seminars
Individual consultations
Tutorials
Experimental work in labs
Project work
Summary
Subject is read with the purpose to understand the basic regularities and processes proceeding at steel casting, solidification and crystallization of steel (by the help of practical exercises), the conditions of homogenous and heterogeneous nucleation of crystals, the micro-segregate and macro-segregate processes, the defects of ingots and continuously cast blanks, the theoretical and technological aspects at steel casting into the ingot moulds as well as on the continuous casting machine.
Compulsory literature:
Recommended literature:
[1] Schwerdtfeger, K.: Metallurgie des Stranggießens. Verlag Stahl und Eisen GmbH. Düsseldorf, Deutschland, 1992. 640 s. ISBN 3 -514-00350-5.
[2] Gupta, R. C.: Theory and Laboratory Experiments in Ferrous Metallurgy, PHI Learning Pvt. Ltd., 2010, p. 32. ISBN: 978-8-120-33924-8.
Way of continuous check of knowledge in the course of semester
Scoring semestral work.
E-learning
Lessons are continuously enriched by ever expanding implementation of e-learning elements.
Other requirements
It is necessary to elaborate a semestral project for the credit obtaining.
Prerequisities
Subject has no prerequisities.
Co-requisities
Subject has no co-requisities.
Subject syllabus:
Lectures
1. Equilibria. Equilibrium constant and manners of its expression. Principle of action and reaction.
2. Criteria of processes equilibria (G, K). Reaction isotherm and its importance.
3. Ideal solution – Raoult’s law. Diluted solution – Henry’s law.
4. Thermodynamic activity of a component in solution. Manners of expressing activity of component in solution.
5. Calculation of activity coefficients in poly-component systems. Molten steelmaking slags – molecular theory of slags.
6. Ion theory of slags. Affinity of elements – especially to oxygen.
7. Nernst distribution law. Distribution of oxygen between slag and metal.
8. Reactions running at production and refining of steel: oxidation of Si and Mn, transfer of oxygen from atmosphere into steel bath. Dephosphorisation of steel.
9. Desulphurisation of steel. Solubility of gases in metals; dependence on partial pressure of gas and on temperature.
10. Hydrogen in iron and steel. Nitrogen in iron and steel.
11. Oxygen in iron and steel. Carbon reaction and its importance at production and refining of steel.
12. Influence of temperature and pressure of development of carbon reaction. Vacuum carbon deoxidation of steel.
13. Coagulating deoxidation of steel. Diffusion deoxidation and deoxidation of steel by synthetic slags.
14. Inclusions in steel. Nucleation of inclusion and modification of inclusions.
Conditions for subject completion
Occurrence in study plans
Occurrence in special blocks
Assessment of instruction