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Perform
High Class Welding With High Tech Plasma Welding Systems.
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3
PROCESSES IN ONE MACHINE
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Plasma
Welding
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TIG
DC Welding
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MMAW
(STICK) DC Welding
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Weld Unalloyed
, Low Alloy and High Alloy Steels , Nickle,Copper , Titanium
, Zircon andTheir Alloys and Special Materials
| Weld
Unalloyed , Low Alloy and High Alloy Steels , Nickle, Copper,
Titanium , Zircon and Their Alloys and Special Materials |
Coated
Electrodes , Rutile and Basic,
Non Alloy and High Alloy Steels,
Nickel Based and Copper Alloys. |
What
is Plasma Welding ?
Plasma arc welding (PAW) is
a advanced version of the tungsten inert gas (TIG) welding
process. TIG welding has a free-burning arc, which is unstable
and tends to wander in the low current range. With increase
in current, the arc power increases and the arc diameter also
increases.
This leads to a lack of concentrated power in the work-piece,
which results in a bigger seam and a larger heat-affected
zone. Unlike TIG-welding torches, PAW uses a constricting
nozzel and employs two separate gas flows, which give rise
to a concentrated plasma arc having a narrow columnar shape.
The plasma column is now stabilized along the axis of the
electrode and is more intense than the TIG-welding arc. The
column temperature is 10,000-24,000 K compared to 8,000-18,000
K in case of TIG-welding.
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ARCRAFT
PW 200 and PW 400 Plasma welding machines operational capabilities:
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Arc
Modes in Plasma Welding:
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Plasma Welding
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| 1. |
Manual
plasma-arc welding is usually adapted to non key hole
fusion type welding. |
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| 2. |
Mechanized
plasma-arc welding is required for high current plasma-arc
applications such as making key hole-mode welds or high
current filler passes.
Metals welded by these processes: Weld unalloyed, low
alloy and high
alloy steels, nickle, copper, titanium, zircon and their
alloys and special
materials. |
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Powder
Surfacing (PTA) is used for wear facing and corrosion
resistance applications using a wide variety of cobalt,
nickel, tungsten carbide, stellite and iron based alloys
in powder form. |
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Untouched
actual welded sample of
5mm SS Plate completed in one single pass using Key hole Plasma
process |
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| The
Plasma-keyhole welding process: |
The
Plasma-keyhole method is a welding process where the gas flow
is restricted through a reduction of the gas orifice. This increases
the gas velocity and the arc temperature. The plasma arc blows
a hole through the joint or the plate. Behind the hole the molten
metal flows together filling the hole, due to the gravity forces,
surface tension and the gas pressure from the shielding gas.
The advantage of the Plasma-keyhole technique is the ability
to weld simple I-butt joints in one single run up to a plate
thickness of 8 mm. This will greatly improve welding efficiency.
An other advantage is the limited distortion obtained with the
process due to the even distribution of heat through the plate
thickness. |
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| Joint preparation
for different welding processes |
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