618-0810/01 – 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. Jiří Bažan, 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.
Additional study materials
Way of continuous check of knowledge in the course of semester
2 points assessed semestral works and their defence in the framework of seminars within the class work .
2 points assessed running tests.
E-learning
For electronic communication with tutors use their university e-mail addresses, which can be found here: http://staff.vsb.cz/
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. Equipment of cast houses. Classification of steels by degree of deoxidation, killed steel, semi- killed steel and rimming steel.
2. Refractory materials used at casting of steel, material properties. Possibilities of evaluation of properties and resistance of refractory materials to molten metals and slags.
3. Casting of steels into ingot-moulds, top pouring, uphill casting. Behaviour of steel in a ladle.
4. Crystallisation of steel.Solidification of steel, regularities, solidification of the ingot crop end.
5. Structure of ingots made of killed and rimming steel.
6. Numerical simulation of ingot's solidification (utilization of ProCAST software - influence of various factors on the solidification process and segregations).
7. Micro-segregation, macro-segregation.
8. Lab experiments of steel solidification I (briefing, set of experiments, realization of simulation of solidification and crystallization, and results evaluation).
9. Lab experiments of steel solidification I (briefing, set of experiments, realization of simulation of shrinkage, and results evaluation).
10. Continuous casting of steel, division, benefits, disadvantages, economy.
11. Design of CCM equipment. Classification of CCM, vertical, horizontal.
12. Primary, secondary and tertiary cooling zone. Solidification of steel in mould, influencing factors.
13. Tundish metallurgy. Defects of continuously cast blanks.
14. Perspectives, new directions at casting of thin blanks.
Exercises
1. Introduction to the subject.
2. Influence of chemical composition on solidification temperature, calculation of liquidus temperatures.
3. Calculation of ingot mould for casting of killed steel, classification of steels by the degree of deoxidation.
4. Calculation of duration and course of ingot solidification.
5. Plant tour at Evraz Vítkovice Steel, a.s. (BOF, LF, CCM).
6. Video-programs (crystallisation of steel, casting of steel).
7. Solidification of the ingot crop end from killed steel.
8. Micro-segregation of steel.
9. Macro-segregation of steel.
10. Laboratory study of the steel structure (introduction to the issues, preparation and implementation of Baumann fingerprint, evaluation of the structure and development of the protocol).
11. Plant tour at ArcelorMittal Ostrava, a. s. – CCM Nos. 1, 2, 3.
12. Plant tour at TŘINECKÉ ŽELEZÁRNY, a. s. (LD converters, CCM Nos. 1, 2).
13. Test, specification of program task, video - CCM, new directions of CCM.
14. Credit.
Conditions for subject completion
Occurrence in study plans
Occurrence in special blocks
Assessment of instruction
Předmět neobsahuje žádné hodnocení.