Course detail
Processing of Special Castings
FSI-PLI Acad. year: 2026/2027 Winter semester
Supervisor
Department
Learning outcomes of the course unit
Prerequisites
Planned learning activities and teaching methods
Assesment methods and criteria linked to learning outcomes
Language of instruction
Czech
Aims
The aim of the course is to familiarize students with the use of vacuum technology and vacuum metallurgy and other special technologies in the preparation and casting of special alloys and with the possibilities of controlling the crystallization of these alloys.
The student will gain knowledge about the effect of reduced pressure of a gaseous atmosphere on liquid alloys, about procedures for melting in vacuum furnaces, induction, arc and electron, and about methods of controlling the crystallization of special castings. He will also gain knowledge about the types of vacuum pumps used and about low pressure measurements. He will learn to perform basic metallurgical calculations used to design a procedure for melting in vacuum.
Specification of controlled education, way of implementation and compensation for absences
The study programmes with the given course
Programme N-SLE-P: Foundry Technology, Master's
branch ---: no specialisation, 4 credits, compulsory
Type of course unit
Lecture
26 hours, optionally
Syllabus
1. Basic characteristics of gaseous mixtures in the region of low gas pressures.
2. Thermal dissociation of gas compounds, equilibrium gas pressure.
3. The process of carbon reaction in vacuum.
4. Dissolution of gases.
5. Degassing in vacuum.
6. Evaporation of alloy components.
7. Casting in induction and electron beam vacuum furnaces.
8. Theoretical foundations of controlling the crystallization of metals.
9. Production of castings with equiaxial grains, controlling the grain size.
10. Castings with oriented columnar grains, single crystals castings.
11. Cobalt alloy castings, cobalt alloys and their production.
12. Production of castings of titanium alloys in vacuum furnaces.
13. Production of castings by electroslag remelting.
Laboratory exercise
12 hours, compulsory
Syllabus
1. Basic design nodes of the vacuum furnace, valves, sealing (laboratory for vacuum metallurgy)
2 Practical application of vacuum gauges, limit pressure of vacuum pumps (laboratory for vacuum metallurgy)
3. Viewing visit to the foundry of special castings. Preparation of ceramic shell moulds, vacuum induction furnaces for metallurgy and foundries
4. Practical demonstration of the progress of melting in vacuum induction furnaces (laboratory for vacuum metallurgy)
5. Creep test of heat-resistant alloys (creep laboratory)
6. Hot isostatic pressing of castings at high temperatures (HIP laboratory)
Computer-assisted exercise
14 hours, compulsory
Syllabus
1. Methods for obtaining vacuum, basic types of vacuum pumps
2. Basic types of vacuum gauges used with melting vacuum furnaces
3. Determination of dissociation tension of oxides and nitrides, practical applications
4. Possibility of blocking the carbon reaction in vacuum
5. Thermodynamics and kinetics of the formation of bubbles
6. Calculation of vapour pressure of alloy components, estimate of changes in chemical composition
7. Raw materials for the charging stock. Charging stock calculation for vacuum induction furnaces