Section
Welding
Fusion joining processes — arc welding (SMAW, GTAW, GMAW, SAW), resistance welding and power-source characteristics.
7 topics
01
Welding Introduction
Fusion vs solid-state welding, weld zones (HAZ, fusion zone) and the arc as a heat source.
02
SMAW
Shielded metal arc welding — coated electrodes, slag, applications and limitations.
03
GTAW
Gas tungsten arc welding — non-consumable tungsten electrode, inert shielding and clean welds.
04
GMAW
Gas metal arc welding — continuous wire electrode, transfer modes and shielding gases.
05
SAW
Submerged arc welding — granular flux, deep penetration and high deposition rates.
06
Resistance Welding
Spot, seam and projection welding — heat = I²Rt, electrode design and weld nugget.
07
Power Characteristics
Constant-current vs constant-voltage sources, V-I characteristics and arc stability.