Table of Contents
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Possible causes
A.
Excessive heat input
A. Weld zone surfaces not free of film
or scale
B.
Insufficient heat input
C.
Too large a weld pool
D.
Improper welding technique
E.
Improper joint design
5.
Excessive melt-through
6.
Incomplete fusion
arc voltage. Reduce the travel speed.
When using a weaving technique, dwell
24
Corrective actions
Reduce the electrode feed rate and arc
voltage.
Increase the travel speed.
Reduce excessive root opening.
Increase root face height.
Clean all groove faces and weld zone
surfaces of any mill scale or impurities
prior to welding.
Increase the electrode feed and the
Reduce arc weaving to produce a
more controllable weld pool.
momentarily on the groove faces. Keep
the electrode directed at the leading
edge of the weld pool.
Maintain the included angle of the
groove joint large enough to allow
access to the bottom of the groove
using proper electrode extension and
arc characteristics. Change the groove
design to a "J" or "U" type.
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