glossary

Operation of quenching steels from the austenitic temperature range so as to produce martensite or a hard structure.

Surfacing applied to a workplace to reduce wear.

References the weld arc as being noisy, spattery or erratic.

The portion of the base metal, adjacent to a weld, the structure or properties of which have been altered by the heat of welding.

A device which is located on the very front of a mechanized torch. Its purpose is to provide electrical isolation from the nozzle during piercing and cutting operations. In addition, it provides the path in which the shield gas impinges the arc at the exit orifice of the heat shield.