652-3021/02 – Theory of foundry processes (TSP)
| Gurantor department | Department of Metallurgical Technologies | Credits | 6 |
| Subject guarantor | doc. Ing. Petr Lichý, Ph.D. | Subject version guarantor | doc. Ing. Petr Lichý, Ph.D. |
| Study level | undergraduate or graduate | Requirement | Compulsory |
| Year | 1 | Semester | winter |
| | Study language | English |
| Year of introduction | 2022/2023 | Year of cancellation | |
| Intended for the faculties | FMT | Intended for study types | Follow-up Master |
Subject aims expressed by acquired skills and competences
Acquired knowledge
- The student will be able to characterize the processes occurring during the solidification and cooling of molten metal
- The student will be able to formulate the basic physic-chemical processes in the interaction of metals with the form
Acquired skills
- The student will be able to apply theoretical knowledge to design manufacturing technology and construction of castings
- The student will be able to apply knowledge of the physic-chemical processes for the verification procedures of casting production
Teaching methods
Lectures
Individual consultations
Tutorials
Summary
The course focuses on the theoretical knowledge and practical knowledge of the theory of foundry processes occurring during casting, crystallization and solidification of molten metal in the mold. Emphasis is placed on knowledge of the physical laws that explain the hydraulic conditions during melt flow and volume changes during solidification and physic-chemical nature of the interactions of metal material forms.
Compulsory literature:
Recommended literature:
Way of continuous check of knowledge in the course of semester
Zkouška: Písemný test. Ústní zkouška. Vypracování semestrálního projektu na zadané téma z oblasti slévárenství slitin železa a neželezných kovů.
E-learning
http://www.fmmi.vsb.cz/cs/urceno-pro/studenty/podklady-ke-studiu/studijni-opory
Other requirements
Elaboration of semestral projects and completion of the interim tests
Prerequisities
Subject has no prerequisities.
Co-requisities
Subject has no co-requisities.
Subject syllabus:
1. Properties of liquid metals, the theory of internal structure melts, the types of solutions. Viscosity, surface tension metals and alloys, non-metallic inclusions.
2. Metal crystallization, nucleation and crystal growth, homogeneous and heterogeneous crystallization, segregation and segregations. Thermal and gravitational convection.
3. Volumetric shrinkage metals. Morphology and solidification zone of melts, melt filtration in dendritic skeleton, two-phase zone, the kinetics of shrinkage.
4. Solidification of metals, solidification kinetics, shrinkage of metals in liquid state. Thermal and thermal node axis. Transformation shrink stress, cracking.
5. Directionally solidified casting, casting module. Boss, function, module riser, riser sizing, pressure ratios and scope riser.
6. Physical fundamentals of fluid flow. Hydraulic conditions during casting. Gating system, the flow of metal in the gating system.
7. Pressure in the mold. Dimensioning and optimization of gating systems. Types gating. Filtration of metals in the gating system.
8. Gases in the casting form. Reoxidation processes in metal form. Endogenous and exogenous bubbles. Condensing zone of the water in the sand form.
9. Properties of metals in the solidus temperature. Heat, phase and shrink tension. The emergence of tensions and cracks in the casting, measurement and removal of residual stresses. Collapse castings.
10. Definition of basic physical quantities in thermal heat transfer between the casting and the mold. Coefficient of thermal expansion.
11. Gravity casting in vacuum and pressurized atmosphere. Centrifugal casting. Moulding under pressure. Low-pressure casting. Casting with crystallization under pressure and in semi-solid state.
13. Solidification of castings in metal molds. Heat mode of the metal mold.
12. The use of acoustic emission in the study of related disorders.
14. Modeling of thermal processes during solidification of castings.
Conditions for subject completion
Occurrence in study plans
Occurrence in special blocks
Assessment of instruction
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