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1.15 Repair methods
Inclusions
The most frequent types of inclusions are oxides. These form
when small fragments of oxide film fall into the weld pool, as
the oxide layer was not removed prior to welding.
As these fragments are in general very fine and uniformly
distributed, they have no discernible influence on the strength
of the weld bead.
This, however, is not the case in the event of insufficient
shielding gas coverage or air infiltration. In these cases,
larger oxide inclusions may be formed, resulting in significant
notching due to material separation.
End craters
A crater forms at the end of each weld bead, which must be
filled (Fig. G).
To do this, do not turn the welding torch off at the end if the
weld bead. The melting welding wire fills the crater (Fig. H).
Alternatively, turn the welding torch on and off repeatedly until
the crate has been filled.
Copyright ©
2010
G
H
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