Initiation to welding metallurgy (Level 1)

Ref : CND_METL01
DURATION :
02 DAYS

Objectives

  • To discover and understand the metallurgical origin of the properties of non and low alloyed steels in order to better apply and enforce the operating procedures and welding instructions

    By the end of the training, you will be able to:

    • To understand what characterizes a steel from a metallurgical point of view
    • To understand how mechanical characteristics are obtained and how welding can affect them
    • To know the factors causing cold cracking of non or low alloyed steels
    • To identify the parameters of the welding procedure to be controlled in order to limit the degradation of the mechanical characteristics and to avoid cracking of the steels.

Public

  • New engineer and technicians in mechanics, materials and industrial maintenance
  • Technicians wishing to convert to the field of welding
  • Welding construction site manager,
  • Team leaders and counter masters in welding who want to learn about welding metallurgy and understand the justification of impositions of DMOS, QMOS and operating specifications in general.
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1.Micrographic Presentation Of A Welding

  • Base metal
  • Heat affected area
  • Melted zone.
  1. Base Metal knowledge
  • Composition
  • Structures
  • Delivery States
  • Notions on the main heat treatments: - annealing - tempering - income
  • Mechanical characteristics of basic products.
  1. Metallurgy of welding
  • Thermal aspect of welding: thermal cycles - essential factors of the thermal cycle - links between welding parameters and thermal cycling
  • Study of phenomena in the ZAT:
  • heating effects
  • cooling effects on the choice of parameters and methods of welding
  • metallurgical defects
  • Study of phenomena in the melted zone
  • Melted Zone chemical Composition
  • Melted Zone Structures particularities
  • the effects of single-pass and multi-pass welding.
  1. Weldability of non and low alloy steels
  • Cold cracking
  • Main factors
  • Origin of the factors
  • Locating cracks
  • Means of prevention: - welding process - welding energy - pre and post heating - filler.