Welding Lecture Notes Flashcards

Flashcards covering key vocabulary and definitions from a welding lecture.

Welding

The fabrication process of joining metals by means of introduction of heat, pressure, or both to form a solid joint as it cools.

Shielded Metal Arc Welding (SMAW)

A manual welding process using a flux-coated consumable electrode with a metal rod at its core, also known as stick welding.

Gas Metal Arc Welding (GMAW)

A welding process, sometimes referred to as MIG/MAG, in which an electric arc forms between a consumable MIG wire electrode and the workpiece metal(s), causing them to fuse.

Gas Tungsten Arc Welding (GTAW)

Also known as TIG welding, uses a non-consumable tungsten electrode that must be shielded with an inert gas to melt the metal being welded.

Submerged Arc Welding (SAW)

A joining process that involves the formation of an electric arc between a continuously fed electrode and the workpiece.

Oxy-Acetylene Welding (OAW)

Welding process that uses a high-heat, high-temperature flame produced by burning acetylene mixed with pure oxygen.

Heat Balance in Fusion Welding

The quantity of heat required to melt a given volume of metal, influenced by factors like specific heat, melting point, and heat of fusion.

Unit Energy for Melting (Um)

The quantity of heat required to melt a unit volume of metal starting from room temperature, measured in J/mm3.

Absolute Temperature

Temperature scale used in heat calculations that is measured in Kelvin.

Heat Transfer Factors (f1, f2)

Factors ranging between zero and one which represent the efficiency of heat transfer in welding (f1) and the melting process (f2).