Spray arc welding
Spray arcs are characterised by the transfer of molten material in the form of many small
droplets, the diameter of which is less than that of the filler wire. As there are no short
circuits, the arc is stable and spatter-free. A prerequisite for successful spray arc welding
is that the values of current and voltage should be over certain limits. This, inturn,
means that more heat is supplied to the workpiece than with short arc welding, and so
only materials of 5thick or more are suitable for spray arc welding. The high heat
input means that the weld pool is also large, so welding has to be performed in the hori-
zontal position. It should be noted that a pure spray arc cannot be obtained when usingco2
as the shielding gas: the shielding gas must be pure argon or (preferably) with a co2
With a thin filler wire, it is possible to perform successful spray arc welding at lower
currents than with a thicker filler wire.
The arc voltage should be set at such a value that it is just sufficiently high to
maintain a short-circuit-free arc. The filler wire is normally connected to the positive
pole.
Supplied By RIHUI Ceramic Welding Backing
Date: 2023-04-10 hits: 581 Return
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