Course detail
Welding Theory and Technology
FSI-HS2 Acad. year: 2025/2026 Winter semester
The course deals with the following topics: Theoretical conditions of the production and existence of a welding joint with respect to welding materials, energetic sources, physical-chemical and metallurgical processes taking place by metallic materials welding. Degradation processes of welding material by thermal deformation cycle. Stress and deformation in welding. Weldability of metallic materials. Weldability of structural carbon steels. Weldability of TMZ high strength steels. Weldability of stainless steels. Weldability of castings. Weldability of Cu, Al, Ti alloys. Weldability of plastics and their destructive and non-dstructive testing of welds.
Language of instruction
Czech
Number of ECTS credits
6
Supervisor
Department
Entry knowledge
1. Fe – Fe3C equilibrium diagram, 2. TTT and thermo-kinetic diagrams, 3. Testing of mechanical properties of metals, 4. Heat treatment of steels. 5 . Basic knowlage welding methods.
Rules for evaluation and completion of the course
The course is finalized with the course-unit credit.
The final exam will be composed of written and oral part.
It is classificated to the ECTS grading scale.
Attendance in lectures is recommended.
Attendance in exercises is compulsory.
The attendance to the seminar is regularly checked and the participation in the lesson is recorded.
Aims
The main objective of the course is to provide students with the theoretical foundations and methodology necessary for solving welding and weldability of metals. It prepares students to apply the acquired knowledge when doing class and diploma projects, and for further studies.
The subject Welding Theory and Technology provides students with basic information describing the structure,properties and defects of welding joints, HAZ and about related conventional and non-conventional welding processes.
Study aids
The study programmes with the given course
Programme N-SLE-P: Foundry Technology, Master's, compulsory
Programme N-STG-P: Manufacturing Technology, Master's
specialization STG: Manufacturing Technology, compulsory-optional
Type of course unit
Lecture
39 hours, optionally
Syllabus
1. Theoretical principles of forming a welding joint, terminology in welding. Physical bases of fusion welding processes. Heat power resources for welding.
2. Extending of heat in a welding joint. Temperature – deformation cycle and temperature calculations. Tension and deformation in welding joints.
3. Macrostructure and microstructure of welding joint and heat effected zone (HAZ). Structure and properties of fusion metal and HAZ.
4. Theory of weldability acc. to european standards.
5. Weldability of metallic materials. Weldability of carbon and carbon – manganese steels.
6. Weldability of microdoped, low and creep resistant steels.
7. Weldability of TMZ and high strength steels.
8. Weldability of high alloy steels (corrosion resistant).
9. Weldability testing, disposition to cracking.
10. Welding of castings (graphitic irons).
11. Welding of aluminium, copper, titanium and their alloys
12. Weldability and welding of plastics.
13. Descructive (DT) and Non-descructive (NDT) testing of welds.
Laboratory exercise
39 hours, compulsory
Syllabus
1.Classification of welding methods in ČSN EN and their basic principles.
2.Application of equilibrium diagrams and their applications in welding
3.Construction of a thermal cycle
4.Influence of hydrogen in weldability
5.Calculation of tensions and deformations
6.Weldability of C – Mn and microdopped steels
7.Application of ČSN EN 1011-2 standard
8.Weldability of high alloy steels
9.Defects in welding joints
10.Power welding sources
11.Calculations in welding of electron beam and laser
12.Powered properties of covered electrodes
13.Credit