Re: [MW:25232] Worm track/hole

txs, to some extend, what u said is correct. now travel speed reduced to 600 and there was a problem in shielding also. now it is better than earlier

Thanks to goswami also

THANKS & BEST REGARDS,

KG.PANDITHAN, IWE,  AWS-CWI, CSWIP 3.1,

CONSULTANT-WELDING & QUALITY

Mobile no: +919940739349

On Mon, Aug 8, 2016 at 8:45 PM, 'prem_nautiyal26' via Materials & Welding <materials-welding@googlegroups.com> wrote:

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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