Fwd: mode of metal transfer

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udaya bhaskar

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Jan 18, 2016, 7:11:42 AM1/18/16
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Dear experts,

Please clarify which mode of metal transfer we are used  in FCAW 

 Welding Process : FCAW
Gas                      : co2
Filler wire             : AWS A5.20 71T-1C
Mode of metal transfer : ? (Please clarify )


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With Regards

Udyabahaskar.D

Chandra

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Jan 18, 2016, 7:22:28 AM1/18/16
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Globular &/ or spray transfer


Chandra

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Juan Carlos Diprinzio

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Jan 18, 2016, 7:22:29 AM1/18/16
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ASME II Part C SFA-5.20/SFA-5.20M

 

A7.1 EXXT-1C and EXXT-1M Classifications.

Both the EXXT-1C and EXXT-1M electrodes have similar type slags and are designed for single and multiple pass welding

using DCEP. The larger diameters (usually 5⁄64 in. [2.0 mm] and larger) are typically used for welding in the flat position and for welding fillet welds in the horizontal position. The

smaller diameters (usually 1⁄16 in. [1.6 mm] and smaller) are typically used for welding in all positions. These electrodes are characterized by a spray transfer, low spatter

loss, flat to slightly convex bead contour, and a moderate volume of slag, which completely covers the weld bead.

Electrodes of this classification have a rutile base slag and have the ability to produce high deposition rates.

With Regards

 

Di Prinzio, Juan Carlos_2

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c sridhar

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Jan 19, 2016, 8:26:30 AM1/19/16
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You have not mentioned about 

1. type of weld - fillet or butt,
2. thickness of the job ,
2. position of weld.

The filler wire could be used both in globular (semi-short circuit) or
in spray arc (free flight) mode depending up on above points.
 
C Sridhar.

"life is like cycling. To maintain balance, keep moving always"



 




From: Juan Carlos Diprinzio <jdipr...@tycsa.com.ar>
To: "material...@googlegroups.com" <material...@googlegroups.com>
Sent: Monday, 18 January 2016 5:49 PM
Subject: RE: [MW:24123] Fwd: mode of metal transfer

Kannayeram Gnanapandithan

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Jan 20, 2016, 4:44:08 AM1/20/16
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It is spray. Ref sec2 partC

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Maulik Thakkar

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Jan 21, 2016, 7:57:55 AM1/21/16
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Dear sir,

With usage of E71T-1C filler wire one can achieve spray like metal transfer (droplets are larger then normal spray droplets) with CO2 due to flux formulations.

One can not achieve true spray transfer in case of FCAW.

Regards,
Maulik H. Thakkar
Welding Engg & Metallurgy
Larsen & Toubro Limited.
India.

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Kannayeram Gnanapandithan

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Jan 21, 2016, 10:25:03 AM1/21/16
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spray transfer may not be possible in Co2 shielding. What is true spray??

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