A highly combustible gas compound of carbon and hydrogen.
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.
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.
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.
The burning of gases within the torch or beyond the torch in the hose,
usually with a shrill, hissing sound.
A cleaning agent used to dissolve oxides, release trapped gases and
slag, and to cleanse metals for welding, soldering, and brazing.
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.
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-