Course detail

Theory of Fusion Weldeability of Metals

FSI-9TTSAcad. year: 2023/2024

The course deals with the following topics: Influence of heat – deformation cyklus for a properties of HAZ of welding materials. The mechanism of heat, cold, lamela and annealing cracs rise. Influence of weld metal attenuation and of specific inserted heat. The metallurgical aspects of fusion welding. Stress and deformation. Welding of steels, the methods for determination of preheat temperature tests of weldeability. Weldeability of irons Al, Cu, Ni and its alloys.

Language of instruction

Czech

Mode of study

Not applicable.

Guarantor

doc. RNDr. Libor Mrňa, Ph.D.

Department

Institute of Manufacturing Technology (ÚST)

Entry knowledge

Successful completion of the course is conditional on the knowledge of: fundamentals of fusion and pressure welding technology, weldability of materials as well as with science of materials.

Rules for evaluation and completion of the course

The final exam will be composed of written and oral part. It is classificated to the ECTS grading scale
Consultations are mandatory.

Aims

The main objektive of the course is to provide students with the complete theoretical knowledge about a metalurgy, stresses and structures of welding metals


Students will be acquainted with theory of metallic materials fusion weldeability.

Study aids

Not applicable.

Prerequisites and corequisites

Not applicable.

Basic literature

FOLDYNA Václav a kol. Materiály a jejich svařitelnost. Ostrava: ZEROSS 2001. 292 s. ISBN 80-85771-85-3.
HRIVŇÁK, Ivan. Teória zvaritel´nosti kovov a zliatin. 1. vyd. Bratislava: Veda 1989. 343 s. ISBN 80-224-0016-5.
KOUKAL,J., D.SCHWARZ a J. HAJDÍK Materiály a jejich svařitelnost. 1. vyd. Ostrava: Český svářečský ústav s.r.o. Ostrava, VŠB-Technická univerzita Ostrava. 2009. 241 s. ISBN 978-80-248-2025-5.

Recommended reading

Not applicable.

Classification of course in study plans

  • Programme D-STG-P Doctoral 1 year of study, winter semester, recommended course
  • Programme D-STG-K Doctoral 1 year of study, winter semester, recommended course

Type of course unit

 

Lecture

20 hod., optionally

Teacher / Lecturer

doc. RNDr. Libor Mrňa, Ph.D.

Syllabus

1. Definition of weldeability. Course of heat and deformation during welding. Field of temperature and stresses. Cycle of temperature.
2. Metallurgical aspects of fuse welding. Reaction of liquid metal with gases.
3. Crystallization and defects of liquid metal. Heat transfer zone.
4. Weldeability of steels - structure and properties HAZ, degradation of HAZ properties. Influence of components on the weldeability. Carbon equivalent, ARA diagrams, determination of preheat temperature.
5. Weldeability of separate of steel types.
6. Heterogeneous welds. Schaeffler´s diagram.
7. Deformation during the welding. Types of deformation and theirs elimination. Straightening.
8. Weldeability of irons.
9. Weldeability of Al and their alloys
10.Weldeability Cu, Ni and their alloys.