Thermal Arc ARCMASTER 185 AC/DC, Operating Manual

Page: 52 / 74

ARCMASTER 185 AC/DC
10-6 Feb r ua r y 20, 2006
Description Possible Cause Remedy
5 Non-metallic pa r ticles
a r e t r apped in the
weld metal (slag
inclusion).
A Non-metallic pa r ticles may be
t r apped in unde r cut f r om
p r evious r un.
A If bad unde r cut is p r esent, clean
slag out and cove r with a r un
f r om a smalle r diamete r elect r ode.
B
Joint p r epa r ation too r est r icted. B Allow fo r adequate penet r ation
and r oom fo r cleaning out
the slag.
C
I rr egula r deposits allow slag to
be t r apped.
C If ve r y bad, chip o r g r ind out
i rr egula r ities.
D Lack of penet r ation with slag
t r apped beneath weld bead.
D Use smalle r elect r ode with
sufficient cu rr ent to give adequate
penet r ation. Use suitable tools to
r emove all slag f r om co r ne r s.
E
Rust o r mill scale is p r eventing
full fusion.
E Clean joint befo r e welding.
F
W r ong elect r ode fo r position in
which welding is done.
F Use elect r odes designed fo r
position in which welding is done,
othe
r wise p r ope r cont r ol of slag
is difficult.
Table 10-2 (continued): Stick Welding P r oblems
Not cleaned, o r
inco rr ect
elect r ode
Slag t r apped in
unde r cut
A r t # A-04993
Slag t r apped in r oot
Figu r e 10-3: Examples of Slag Inclusion