Welding terms
Arc blow – Deflection of an arc from its normal path by magnetic forces
Arc voltage – The differences in potential across the welding
Defect – Discontinuities or undesirable geometry that makes a part
unacceptable.Defects are cause for rejection.
Deposition rate – Speed at which filler metal is added to a joint or deposited on a surface.
Dilution – The amount of fused base metal that has mixed with filler metal in the weld.Expressed in percent.
Duty cycle – Percent of a 10 minute period during which a power supply can operate without over loading
HAZ(Heat Affected Zone): A portion of zone in welded joint which is influenced by heat input and the mechanical properties or micro structure changes
As welded : The state of weld or weldment after welding ,prior to thermal or mechanical treatment.
Autogenous weld : A fusion welded joint without any addition of filler metal.
Automatic welding : Welding machine performs the operation without constant observation and adjusting of various controls by operator.
Back gouging : Weld and base metal removed from back side
of a partially welded joint for subsequent welding.
Back hand welding : Welding torch moved opposite to direction of welding.
Backing : Material placed over the root to assure a good weld.
Backing ring : Backing in the form of a ring ,generally used for pipe welding.
Backing strip : Backing in the form of a strip ,while plate welding.
Back step sequence:Welding procedure where weld bead increments are deposited opposite to direction of welding.
Back weld:Weld made on the back side of a single groove joint.
Bare electrode:A consumable electrode used in arc welding, consisting of metal wire without flux coating.
Base metal:A metal to be welded,brazed,soldered or cut.
burn-through
A term for excessive visible root reinforcement in a joint welded from one side or a hole through the root bead.
buttering
One or more layers of deposited weld metal on the face of a weld preparation or surface that will be part of a welded joint.
constant current power supply
cc
An arc welding power source with a volt-ampere relationship yielding a small welding current change from a large arc voltage change.
constant voltage power supply
cv
An arc welding power source with a volt-ampere relationship yielding a large welding current change from a small voltage change.
direct current electrode negative
DCEN
The arrangement of direct current arc welding leads in which the electrode is the negative pole and workpiece is the positive pole of the welding arc. Commonly known as straight polarity.
direct current electrode positive
DCEP
The arrangement of direct current arc welding leads in which the electrode is the positive pole and the work piece is the negative pole of the welding arc. Commonly known as reverse polarity.
Inter-pass temperature, welding
In a multipass weld, the lowest temperature of the deposited weld metal before the next weld pass is started.
preheat
Metal temperature value achieved in a base metal or substrate prior to initiating the thermal operations. Also equal to the minimum interpass temperature.