CARBONE TIG160PDCHF, Operator'S Manual, Page: 21 / 38

B-7 OPERATION B-7
Increasing the frequency constricts the arc,
increases stability and improves weld quality.
FIGURE B.6
STEEL TIG WELDING
The TIG process is very effective for welding both
carbon steel and alloy steel, especially in
applications requiring precision results. DC
Electrode Negative Polarity is required. Since this
process does not include the removal of impurities,
proper cleaning and preparation of the edges is
required.
FILLER MATERIAL:
The filler rods must deposit welds with mechanical
characteristics appropriate for the application.
COPPER TIG WELDING
Since the TIG welding is a process characterized by
high heat concentration, it is particularly suitable for
welding materials with high thermal conductivity,
like copper. As with steel, the DC Electrode
Negative
Polarity is employed, with argon as protective gas.
Considering the fluidity of molten copper, the use of
backup support may prove useful.
FILLER MATERIAL:
In order to avoid the oxidation of the molten material,
filler materials containing phosphorus, silicon or
other deoxidating materials are typically used. The
mechanical properties can also be improved
through the use of silver.
DC TIG-NOT PULSED
DC PULSED TIG
I(A)
Ip
I(A)
Ip
Im
Ia
t
t
T