Rig Fab Educational Services
Welder’s Handbook
Weld Pool – The localized volume of molten metal in a weld prior to its solidification as weld metal.
Weld Puddle – A nonstandard term for weld pool.
Weld Reinforcement – Weld metal in excess of the quantity required to fill a joint.
Wetting – The phenomenon whereby a liquid filler metal or flux spreads and adheres in a thin continuous layer on a solid base metal.
Wire Feed Speed – The rate at which wire is consumed in arc cutting, thermal spraying, or welding.
Work Angle – The angle less than 90deg. between a line that is perpendicular to the cylindrical pipe surface at the point of intersection of the weld axis and the extension of the electrode axis, and a plane determined by the electrode axis and a line tangent to the pipe at the same point. In a T-joint, the line is perpendicular to the non-butting member. This angle can also be used to partially define the position of guns, torches, rods and beams. Work Hardening – The capacity of a material to harden as the result of cold rolling or other cold working involving deformation of the metal such as forming, bending, or drawing. Workpiece – The piece of material to be cut or gouged Wrought Iron – A commercial form of iron that is tough, malleable, and relatively soft; less than 0.3% carbon. Y Yield Strength – The stress point at which permanent deformation results. Z Zirconium – An element used in some electrodes as a plasma arc cutting electrode emitter. Although similar to hafnium, zirconium provides a shorter service life.
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