Other interesting thing to check is the storage of your filler metals. Especially in case of Flux Cored Wires, if those are folded type instead of seamless bad storage conditions can caused moisture pickup in the flux which definitely will result in wormholes in your weld metal.
Met vriendelijke groeten / Best Regards,
Herman Pieper
QA-QC Inspector / CSWIP + IWI-C Welding Inspector / IWT / Materials Expert
Job van der Havestraat 6
8384 DB, Wilhelminaoord
Cell: +31 6 51691215
Van: 'prem_nautiyal26' via Materials & Welding [mailto:materials-welding@googlegroups.com]
Verzonden: maandag 8 augustus 2016 17:15
Aan: materials-welding@googlegroups.com
Onderwerp: Re: [MW:25231] Worm track/hole
Few years back even I used to get the similar wormholes in my FCAW Welds (can't disclose the brand).
I tried many variables.
Eventually the only variable that helped was change of brand !!
Also your travel speed of 800mm/min is very high.
Aim for @ 300 to 350 mm/min
Regards
Prem Nautiyal
9769316004
Sent from my Samsung Galaxy smartphone.
-------- Original message --------
From: Kannayeram Gnanapandithan <kgpandithan@gmail.com>
Date: 06/08/2016 19:13 (GMT+05:30)
To: materials-welding <materials-welding@googlegroups.com>
Subject: [MW:25208] Worm track/hole
Process FCAW, Wire E81T1-B2/Dia 1.2mm, shielding 85%Ar+15%Co2. Flow rate 20lpm. Current 240amps, 26 volt, travel speed 800mm/ minute. while welding, we are getting defect of wormholes/wormstracks , some time continuous and intermittent on top of the weld. Experts, what would be the reason for this defect?
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