MicroMIG™ is a pulsed-arc micro-weld process
that deposits a solid filler material on a metallic
base material which results in a fused metallurgically
bonded weld without distortions or observable HAZ (heat
affected zone).
Like other modern welding processes, there are three
components: power supply, controls, and welding torch
or gun. Inert gas fed through the gun's gas cup keeps
the welds shielded from the contaminating atmosphere
and the filler material is fed through the torch
allowing the manual version of our process to be a
one-handed operation. MicroMIG™produces its excellent
results through true metallurgical fusion of a weld
filler material and the parent base material.
MicroMIG™produces microscopic conventional
welds. Multiple passes are required to provide desired
thickness, because each of the weld passes is measured
in thousandths, not sixteenths of an inch.
When you scale down the homogenous weld layer
thickness, you also scale down the heat affected zone
(HAZ). If our weld beads are measured in thousandths,
then the HAZ is measured in millionths of an inch. This
is how we weld on "unweldable" alloys with complete
success, because the HAZ is so small. Welds this small
result in welds that require a much longer time to
produce a finished product.
For this reason, applications must be chosen carefully
because what could be done in ten minutes with a TIG
torch may require several hours withMicroMIG™. There is
such a low total heat input that the bulk base metal
remains near ambient temperature; because of this the
heat has time to dissipate.
The end result is no distortion of parts from our
welding process. Therefore, although some parts are
made of very easily welded metals, those machine
finished to tight tolerances we repair
withMicroMIG™because a conventional welding process
like TIG would distort them out of tolerance.
MicroMIG™welds melt only the surface of a part,
allowing us to weld different fillers metals on
different base metals.
We can weld a nickel or cobalt
matrix mixed with a variety of different carbides on
almost any metal surface for excellent wear resistance.
We can weld nickel alloys or stainless steels on mild
steels for corrosion resistance. We can weld easy to
braze metals (or even braze alloys themselves) on the
surface of very hard to braze materials, thus almost
guaranteeing perfect braze assemblies on tough brazing
applications.
MicroMIG™ is unique because of the
1) Thewire diameters we
use
2)Theway we pulse
3) The way we control the currents plus
voltages.
Our process is
proprietary in the sense that we do not sell equipment.
We offer our MicroMIG™ welding process to customers by
offering welding services. We use our process to repair
and help fabricate parts for customers every day. We
strive to have very short turn-around times and our
weld quality is excellent.
Metal, metallurgically bonded by the MicroMIG™ welding
process, will not chip or spall off like competing
processes which depend on mechanical and secondary
bonding. Applications include restoration of part
dimensions due to casting defects and machining errors,
also creating thermal or corrosion barriers, improving
wear resistance, and solving brazing problems .
The result is a fused metallurgical bonded weld deposit
with no observable HAZ or distortion of the base
material and shares some of the attributes of many arc
welding processes. A power supply furnishes electrical
energy to a special welding torch. A pulsed arc raises
the temperature of the filler metal to liquidus
temperature and welds it to the base material.