T - Welding to Hydrogen Welding Flashcards
Most important PERMANENT joining methods. FUSION of separate parts which are locally melted.
WELDING
HAZ
Heat Affected Zone
Types of joints in welding
BUTT
CORNER
EDGE
TEE
LAP
What must be cut, usually by grinding, to achieve a successful Butt joint?
VEE-GROOVE (notch)
One run of WELDING forms a…
BEAD
WELDING is based on 3 factors:
HEAT SOURCE
FILLER
OXIDATION CONTROL
Simplest type of welding …
OXY-FUEL GAS WELDING
Two gases used in OXY-FUEL GAS WELDING
ACETYLENE
OXYGEN
Welding flame which has excess of Acetylene and is used for ALLOY STEEL and ALUMINUM
Carburizing/Reducing
Welding flame with equal amounts of the two gases and is used for LOW CARBON STEEL and MILD STEEL
Neutral Flame
Welding flame which has an excess of OXYGEN and is used for BRASS, BRONZE and COPPER
Oxidizing Flame
Provides a source of additional molten metal from which to build up the welding bead.
FILLER ROD
Advantages of OXI-FUEL GAS WELDING
Simple Inexpensive equipment
Les bulky PPE
Easy cleanup
Welding which derives its heat from an electrical discharge (arc) between the electrode and the workpiece
ARC WELDING
Most basic type of ARC WELDING
STICK WELDING
STICK WELDING is also known as SMAW
Shielded Metal Arc Welding
Used as the electrode in ARC WELDING, which also fulfills the function of a filler rod in oxy fuel welding.
WELDING ROD
Welding rods are coated in a brittle ceramic substance called a
FLUX
Types of FLUX for WELDING RODS
Basic-made from calcium carbonate, calcium fluoride, magnesium carbonate
Rutile-made from titanium
Cellulose
MIG welding
Metal Inert Gas Welding
GMAW
Gas Metal Arc Welding
MIG WELDING uses a motor to feed wire through the holder at a fixed rate, also known as…
GUN
MIG WELDING floods the weld pool with inert gas (shielding gas) to replace the need of a flux, such as
ARGON
HELIUM
CARBON DIOXIDE
In MIG WELDING, what allows the operator to electrically connect/disconnect the wire electrode, and activate the wire feed?
TRIGGER
Replacement for SHIELDING GAS, which does not need gas, but requires cleanup
FLUX CORED WIRE
Automated MIG WELDING process performed specifically on vertical surfaces
ELECTROGAS WELDING (EGW)
TIG
Tungsten Inert Gas
GTAW
Gas Tungsten Arc Welding
Non consumable electrodes are made of tungsten and are used in
TIG AND GTAW
TIG is used for the following metals
Stainless Steel
Aluminium “Sapphire”
PAW
Plasma Arc Welding
Tungsten electrode tip terminates inside the gun above a narrow copper nozzle. Uses shielding gas.
AHW
Atomic Hydrogen Welding
Specialized arc welding process, the arc is struck between two adjacent electrodes in the gun head
