Glossary Terms and Definitions Flashcards
What is Active Flux?
A flux formulated to produce a weld metal composition dependent on the welding parameters, especially arc voltage.
What is Alloy Flux?
A flux containing ingredients reacting with the filler metal to establish a desired alloy content in the weld metal.
What is Alternating Current?
Current flow in an electrical circuit where its direction (and therefore direction of electron flow) continually reverses itsell usually at a predetermined frequency. The positive half and negative half of the AC sine wave together represent one complete cycle of alternating current.
What is Arc Plasma
A gas heated by an arc to at least a partially ionized condition (free electrons and free positive ions), enabling it to conduct an electric current.
What is a Autogenous Weld
A fusion weld made without filler metal
What is Bonded Flux (submerged Arc Welding)
A granular flux produced by baking a pelletized mixture of powdered ingredients and bonding agents at a temperature below its melting point, but high enough to create a chemical bond, followed by processing to
produce the desired particle size.
What is Deposition Rate?
The weight of material deposited in a unit of time.
What is Direct Current Electrode Negative (DCEN)
An arrangement of direct current arc welding leads in which the electrode is the negative pole and the workpiece is the positive pole of the welding arc.
What is Direct Current Electrode Positive (DCEP)?
An arrangement of direct current arc welding leads where the electrode is the positive pole and the workpiece is the negative pole of the welding arc
What is the Drag Angle?
The travel angle when the electrode is pointing in a direction opposite to the progression of welding. This angle can also be used to partially define the position of guns, torches, rods and beams.
What is Flux?
A material applied to the workpiece(s) before or during joining or surfacing to cause interactions that remove oxides and other contaminants, improve wetting, and affect the final surface profile. Welding flux may also affect the weld metal chemical composition.
What is the Fusion Zone?
The area of base metal melted as determined on the cross-section of a weld
What is the Heat-Affected Zone (HAZ)
The portion of the base metal whose mechanical properties or microstructure have been altered by the heat of welding, brazing, soldering or thermal cutting.
What is the Push Angle
The travel angle when the electrode is pointing in the direction of weld progression. This angle can also be used to partially define the position of guns, torches, rods and beams.
What is Surface Tension?
A force at the surface of liquid that tries to reduce its surface area and prevent “the liquid” from wetting the solid that it is in contact with.
What is the Travel Angle?
The angle less than 90” between the electrode axis and a line perpendicular to the weld axis, in a plane determined by the electrode axis and the weld axis.
What is a Welding Rectifier?
Solid state device used to convert alternating current to direct current.
What is the Work Angle?
The angle less than 90” between a line perpendicular to the major workpiece surface and a plane determined by the electrode axis and the weld axis. ln a T-joint or corner joint, the line is perpendicular to the non-abutting member. This angle can also be used to partially define the position of guns, torches, rods, and beams.
What is toughness?
The ability of a material to resist the growth of a crack
What is quenching
Very fast cooling rate
results in very hard needle like structure
called martensite
(mass of interlocking needles)
What is hardenability?
the ability of steel to form martensite at a given cooling rate
What is tempered
To enhance toughness, although there will also be a loss of hardness
What is normalizing?
Process for refining the grain size of the steel to improve its properties.
Heat the steel to 900C followed by cooling in air.
What is annealing?
Furnace cooled
Lowers hardness and increases ductility
Soften for machining
