Metallurgy Of Welding (Level 3)
Objectives
By the end of this internship, you will be able to:
- To identify the factors of welding operations that affect the metallurgical characteristics of welded joints
- To explain how these factors affect the metallurgical characteristics of welded joints
- To evaluate the metallurgical risks related to the welding of unalloyed steels (risks of cracking, risks of deterioration of the properties of use …)
- to evaluate the metallurgical risks related to the welding of low-alloy steels
- to evaluate the metallurgical risks related to the welding of so-called stainless steels
- to evaluate metallurgical risks related to the heterogeneous welding of steels of different grades or families
- to appreciate how to optimize the procedures of welding compared to metallurgical risks evoked
Public
Technicians and engineers confronted with the metallurgical difficulties posed by welding. To follow this course, it is essential to have acquired basic knowledge in metallurgy and useful to possess notions of welding. If this is not the case, we strongly recommend to follow our courses “Bases of general metallurgy for welding (level -2)”
Prerequisites
- No prerequisites are required.
- Notions of mathematics needed: Calculate energies, understand the contribution of heat, understand the units, proportions and prepare for reading of plan, calculation of rate of dilution.
Program
- Introduction to weldability
- Notions of weldability
- Metallurgical consequences.
- THERMAL EFFECTS OF WELDING
- Cycles and thermal distribution
- Comparison of welding processes
- Influence of welding parameters.
- Structural changes in thermally affected areas
- Effects of welding thermal cycles
Nondestructive testing
- Melted Zone chemical Composition
- Behavior of the base metal and the filler metal
- Influence of welding gases and slags.
- Melted Zone chemical Composition
- Solidification structures
- Regeneration in multi-pass welding
- Causes of blisters and remedies.
- Weldability Of Non And Low Alloy Steels
- Cold cracking
- Hot cracking
- Aging (Fields)
- Lamellar tearing
- Reheat cracking
- Case Studies.
- Weldability of highly allied steels
- Reminders of the general characteristics of stainless steels
- Weldability of martensitic steels
- Weldability of ferritic steels
- Weldability of austenitic steels
- Weldability of austenitic-ferritic steels.
- Case Studies
- Mixed and heterogeneous assemblies
- Welding or reloading with dissimilar steels
- Determination of welding procedures.
