Metal Joining Processes

UNIT III : Metal Joining
Processes
 Classification of welding processes,
 Types of welding
Welded joints and V-I characteristics,
Arc welding,
Weld bead geometry
Submerged arc welding. applications,
advantages and disadvantages
Gas tungsten. applications, advantages and
disadvantages
Gas metal arc welding applications.
applications, advantages and disadvantages
Fabrication processes

, UNIT III : Metal Joining
Processes
 Heat affected zones in welding
soldering
Types of soldering and their applications
 brazing
 Types of brazing and their applications
Types and their applications
Welding defects
Causes and remedies

, UNIT III : Metal Joining
Processes
Welding :
Welding is a process of joining
similar metals by application of heat with or
without application of pressure and
additional of filler material.
Welding joints different
metals/alloys. In welding heat is supplied
either electrically or by means of a gas
torch.

, UNIT III : Metal Joining
AdvantagesProcesses
 Welding is more economical and is much
faster process as compared to other processes
(riveting, bolting, casting etc.)
Welding, if properly controlled results
permanent joints having strength equal or
sometimes more than base metal.
Large number of metals and alloys both
similar and dissimilar can be joined by
welding.
 General welding equipment is not very
costly.
 Portable welding equipment can be easily
made available.
Welding permits considerable freedom in

design. Welding can join welding jobs through