Lectures:
1. Theory of welded joint creation during fusion welding and solid-state welding. Energy sources used for welding. Weld thermal cycles. Measurement of thermal cycles, calculation of thermal cycles.
2. Theory of heat-affected zone of welded joints. Effect of thermal cycle on HAZ. Precipitation and degradation processes in HAZ.
3. Solidification of the weld metal. Segregation and liquation. External shape factor of weld. Structure and properties of weld metal.
4. Metallurgical processes in weld metal. Theory of slag. Alloying of weld metal.
5. Desulfurization and dephosphorization of the weld metal. Absorption of oxygen in weld metal, desoxidation. Absorption of hydrogen in weld metal. Absorption of nitrogen in weld metal.
6. Cracks in welded joints. Causes of occurrence, susceptibility criteria, cracking tests. Cold cracking, hot cracking, lamellar, annealing , underclad and corrosion cracking.
7. The theory of stress and deformation in welded joints. Calculations. Temporary and residual stresses. Methods of reducing of stress and deformation in welded joints.
8. The theory of soldering. Defects of solder joints. Properties of solder joints. Solderability tests. Solders and fluxes.
9. Welding of heterogeneous joints. Effect of chemical composition and welding methods. Using Schaffler diagram. Problems in welding of heterogeneous joints.
10. Weldability of heat resistant steels
11. Weldability of stainless steels. Weldability of cast irons and cast steels.
12. Weldability of copper and its alloys. Weldability of aluminum and its alloys.
13. Weldability of titanium and its alloys. Weldability of nickel and its alloys.
14. Welding of plastics.
Excercises:
1. Introductory exercises. Learning outcomes and competences. Safety training. Repetition of the welding basics.
2. Thermal and deformation cycle of welding, methods of calculation and measurement of temperature cycles. Project No. 1 - Calculation of temperature cycles.
3. Numerical solution of welding temperature fields.
4. Laboratory Exercise - Measurement and Temperature Control of Welding and Heat Treatment. Measurement of temperature cycles in arc welding.
5. Consultation on Project No.1. Analytical and numerical solution of temperature fields.
6. Laboratory exercise: metallographic evaluation of HAZ for selected welding technologies.
7. Entering of project No. 2 - Welding of heterogeneous weld joint.
8. Technologies and techniques of heterogeneous welding joints, welding of non-ferrous metals. Using a virtual welding simulator.
9. Consultation on project No.2. Material Weldability Rating.
10. Laboratory exercise: residual stress measurement, welding deformation, material separation, flame straightening techniques.
11. Welding of plastics, soldering and bonding.
12. Project No. 3 - Determination of weld joints deformations.
13. Excursion to the engineering company.
14. Final Exercise. Test. Evaluation of projects.
1. Theory of welded joint creation during fusion welding and solid-state welding. Energy sources used for welding. Weld thermal cycles. Measurement of thermal cycles, calculation of thermal cycles.
2. Theory of heat-affected zone of welded joints. Effect of thermal cycle on HAZ. Precipitation and degradation processes in HAZ.
3. Solidification of the weld metal. Segregation and liquation. External shape factor of weld. Structure and properties of weld metal.
4. Metallurgical processes in weld metal. Theory of slag. Alloying of weld metal.
5. Desulfurization and dephosphorization of the weld metal. Absorption of oxygen in weld metal, desoxidation. Absorption of hydrogen in weld metal. Absorption of nitrogen in weld metal.
6. Cracks in welded joints. Causes of occurrence, susceptibility criteria, cracking tests. Cold cracking, hot cracking, lamellar, annealing , underclad and corrosion cracking.
7. The theory of stress and deformation in welded joints. Calculations. Temporary and residual stresses. Methods of reducing of stress and deformation in welded joints.
8. The theory of soldering. Defects of solder joints. Properties of solder joints. Solderability tests. Solders and fluxes.
9. Welding of heterogeneous joints. Effect of chemical composition and welding methods. Using Schaffler diagram. Problems in welding of heterogeneous joints.
10. Weldability of heat resistant steels
11. Weldability of stainless steels. Weldability of cast irons and cast steels.
12. Weldability of copper and its alloys. Weldability of aluminum and its alloys.
13. Weldability of titanium and its alloys. Weldability of nickel and its alloys.
14. Welding of plastics.
Excercises:
1. Introductory exercises. Learning outcomes and competences. Safety training. Repetition of the welding basics.
2. Thermal and deformation cycle of welding, methods of calculation and measurement of temperature cycles. Project No. 1 - Calculation of temperature cycles.
3. Numerical solution of welding temperature fields.
4. Laboratory Exercise - Measurement and Temperature Control of Welding and Heat Treatment. Measurement of temperature cycles in arc welding.
5. Consultation on Project No.1. Analytical and numerical solution of temperature fields.
6. Laboratory exercise: metallographic evaluation of HAZ for selected welding technologies.
7. Entering of project No. 2 - Welding of heterogeneous weld joint.
8. Technologies and techniques of heterogeneous welding joints, welding of non-ferrous metals. Using a virtual welding simulator.
9. Consultation on project No.2. Material Weldability Rating.
10. Laboratory exercise: residual stress measurement, welding deformation, material separation, flame straightening techniques.
11. Welding of plastics, soldering and bonding.
12. Project No. 3 - Determination of weld joints deformations.
13. Excursion to the engineering company.
14. Final Exercise. Test. Evaluation of projects.