Course detail
Welding Theory and Technology
FSI-HS2 Acad. year: 2021/2022 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. Principles and theories of individual welding methods and thermal cutting. Brazing of materials. Thermal spraying. Destructive and non-dstructive testing of welds.
Supervisor
Department
Learning outcomes of the course unit
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.
Prerequisites
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.
Planned learning activities and teaching methods
The course is taught through lectures explaining the basic principles and theory of the discipline. Teaching is suplemented by practical laboratory work.
Assesment methods and criteria linked to learning outcomes
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.
Language of instruction
Czech
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.
Specification of controlled education, way of implementation and compensation for absences
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.
The study programmes with the given course
Programme N-SLE-P: Foundry Technology, Master's
branch ---: no specialisation, 5 credits, compulsory
Programme N-STG-P: Manufacturing Technology, Master's
branch STG: Manufacturing Technology, 5 credits, compulsory-optional
Type of course unit
Lecture
39 hours, optionally
Teacher / Lecturer
Syllabus
1. Theoretical principles of forming a welding joint, terminology in welding
2. Physical bases of fusion welding processes. Heat power resources for welding.
3. Extending of heat in a welding joint
4. Temperature – deformation cycle and temperature calculations
5. Tension and deformation in welding joints
6. Macrostructure and microstructure of welding joint. Structure and properties of fusion metal
7. Structure and properties of Heat affected zone
8. Weldability of metallic materials. Weldability of carbon and carbon – manganese steels
9. Weldability of microdoped, low and high alloy steels
10. Weldability testing, disposition to cracking
11. Welding of aluminium, copper, titanium and their alloys
12. Welding of graphitic irons,. Principles and processes of heat cutting
13. Brazing and soldering. Thermal spraying.
14. Descructive (DT) and Non-descructive testing of welds
Laboratory exercise
39 hours, compulsory
Teacher / Lecturer
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