618-1901/01 – Theory of Foundry Engineering Processes (TSP)
| Gurantor department | Department of Metallurgy and Foundry | Credits | 10 |
| Subject guarantor | doc. Ing. Jiří Hampl, Ph.D. | Subject version guarantor | doc. Ing. Jiří Hampl, Ph.D. |
| Study level | postgraduate | Requirement | Choice-compulsory |
| Year | | Semester | winter + summer |
| | Study language | Czech |
| Year of introduction | 2012/2013 | Year of cancellation | |
| Intended for the faculties | FMT | Intended for study types | Doctoral |
Subject aims expressed by acquired skills and competences
Student will be able:
-to define influences affecting foundry processes;
-to describe basic processes during forming a casting from pouring it up to metal cooling;
-to know the method of calculating the gating system;
-to know the method of calculating the risers;
-to explain the conception of controlled solidification.
-to know the rules for obtaining good casting with no defects;
-to apply the metal filtration aids during pouring and feeding of metal during solidification;
-to solve the degasification and venting of a foundry mould.
Teaching methods
Lectures
Individual consultations
Other activities
Summary
Structure and physical properties of molten metals. The principles of metal
flowing, pressure conditions in gatings. The running property of liquid metals
and alloys and their coherence with the design of castings. The thermal and
physical processes in a casting and in a mould. Interaction between casting
and mould. Crystallization and solidification of castings. The thermodynamic
conditions of crystallization. Shrinkage and drawing-off metals and alloys,
the solidifying and solid state. Segregation-liquation in castings, the
chemical non-homogeneity of castings. Stress in a casting, shrinking stress,
internal thermal stress, phase stress, elastic and plastic state of material.
The physical conditions of initiation of fissures and cracks in castings.
Application of the acoustic emission on the state of stress at solidification,
at cooling-down and at heat treatment of a casting. The computer’s simulation
of solidification and of stress in a casting.
Compulsory literature:
CAMPBELL, J.: Castings, Butterworth-Heinemann. Oxford, 2000.
SCHLEGG,F.P. et al. Technology of Metalcasting , AFS Publication, 2003.
Recommended literature:
STEFANESCU,D,,M. : Science and Engineering of Casting Solidification.Cluver Academic/Plenum Publishers, New York, 2002.
DANTZIG,J.A.;RAPPAZ,M. : Solidification, EPFL Oress, Boca Raton,2009
Way of continuous check of knowledge in the course of semester
Elaboration of written project
E-learning
http://www.fmmi.vsb.cz/cs/okruhy/studium-a-vyuka/podklady-ke-studiu/studijni-opory/
Other requirements
Elaboration of written project
Prerequisities
Subject has no prerequisities.
Co-requisities
Subject has no co-requisities.
Subject syllabus:
1. Physical properties of molten metals and alloys.
2. Fluidity and castability of molten metal.
3. Flow dynamics of molten metal.
4. Gating system design.
5. Gases in metal and their transport in mould cavity.
6. Crystallization. Nucleation. Dendritic growth.
7. Solidification (freezing) of casting. Thermal axis.
8. Solidification contraction and shrinkage formation.
9. Hot spots. Chills. Feeding distance.
10. Risering (feeding) . Progressive and directional solidification.
11. Solid contraction.
12. Contraction stress. Hot tearing.
13. Properties of metals at high temperature (near solidus).
14. Thermal stress, Residual stress. Cold cracking.
Conditions for subject completion
Occurrence in study plans
Occurrence in special blocks
Assessment of instruction
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