TM 1-1500-204-23-8
GLOSSARY
ACETYLENE -
A highly combustible gas compound of carbon and hydrogen.
ALLOY-
A mixture, with metallic properties, composed of two or more
elements of which at least one is a metal.
ARC WELDING -
A group of welding processes in which fusion is obtained by heating
with an electric arc or arcs, with or without the use of filler metal.
BRAZING -
A group of welding processes in which a groove, fillet, lap, or flange is
bonded by using a nonferrous filler metal having a melting point
above 800° F (427° C) but below that of the base metals. Filler metal
is distributed in the joint by capillary attraction.
BUCKLING -
Distortion caused by the heat of a welding process.
CARBURIZING FLAME -
An oxyacetylene flame in which there is an excess of acetylene.
Also called excess acetylene or reducing flame.
FLASHBACK-
The burning of gases within the torch or beyond the torch in the hose,
usually with a shrill, hissing sound.
FLUX -
A cleaning agent used to dissolve oxides, release trapped gases and
slag, and to cleanse metals for welding, soldering, and brazing.
FUSION -
A thorough and complete mixing between the two edges of the base
metal to be joined or between the base metal and the filler metal
added during welding.
GAS WELDING -
A process in which the welding heat is obtained from a gas flame.
JOINT-
That portion of a structure in which separate base parts are joined.
NEUTRAL FLAME -
A gas flame in which the oxygen and acetylene volumes are
balanced and both gases are completely burned.
OXIDIZING FLAME -
An oxyacetylene flame in which there is an excess of oxygen. The
unburned excess tends to oxidize the weld metal.
OXYACETYLENE WELDING -
A welding process in which the required temperature is attained by
flames obtained from the combustion of acetylene with oxygen.
REVERSE POLARITY -
The arrangement of direct current arc welding leads in which the work
is the negative pole and the electrode is the positive pole of the weld-
ing arc.
Glossary 1
