Spiral welding specialists Atlantic Engineering profile

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Confidence in our spiral welding
stems from precision engineering
control of all parameters to ensure
full base material weld fusion,
full inter- run fusion, low dilution
rates and minimum heat affected
zone during all stages of the process

Spiral weld shaft repair
The above photograph shows a section
through a typical motor rotor
bearing journal configuration,
the quality of the multi runs of
weld being clearly evident.
The test piece shown forms part
of our multi-disciplined operator training.

Spiral weld procedures are used
extensively and successfully for
all types of shaft reclamation,
from ships propeller shafts to
small pump shafts, another successful
example is the refurbishment of
Simplex type seal liners.

Spiral weld repairs to seal liners
The repair procedures carried out
at Atlantic Engineering are class
approved and restore the liners
back to their original dimensions.

Inconel is typically used for this
repair to improve the wear and
corrision resistance of the liner.

Spiral weld repairs to seal liners

On site repair to fan shaft
A recent contract involved the
refurbishment of the bearing area
of a 26-ton extraction fan shaft
with a fan diameter of 10 metres.
The repair, which was carried out
on site, involved prep machining
the damaged area of the shaft and
carrying out non destructive examination
prior to building up the shaft with
an automatic spiral weld overlay
and finish machining back to original

On site spiral weld repair to fan shaft
Positive material analysis was
carried out on the shaft material
prior to repair, using our portable
optical spectrometer. After prep
machining NDE was carried out, this
revealed significant surface cracking
which was attributed to an earlier
repair using a manual metal arc procedure,
this had resulted in hardening within
the heat affected zone and subsequent
fatigue cracking. Further machining
was necessary to remove this defect.

Analysis on the shaft had identified
it as a high carbon EN8 type material
that would require carefully controlled
pre heat and post weld heat treatment
using electric blankets. After finish
machining and polishing, a final NDE by
fluorescent magnetic particle inspection
was carried out before the fan was put
back into service.
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