increase ur flow rate
THANKS & BEST REGARDS
KG.PANDITHAN, AWS-CWI, CSWIP 3.1
CONSULTANT-WELDING & QUALITY
On Wed, May 28, 2014 at 11:38 PM, Maulik <mlkthakkar2@gmail.com> wrote:
--Dear experts,
Please guide me regarding following query:
We are leading fabricator of Al light weight vessels utilizing GMAW-P process. However, we found extensive porosity problems in most of times during 2G and 4G positional welding only when utilizing 99.995% Ar as a shielding gas. In 3G and 1G position seam is getting clear with no indication. We are also using He+Ar as a shielding gas & level of porosity drastically decrease due very known technical reason " getting hot arc welding".
However due to some constraints for short span of time, we are not able to utilize He+Ar for all seams & have to use Ar as shielding gas.
In view if above please suggest how to effectively utilize Ar shielding gas without RT failure, particular to welding in 2G and 4G positions.
Base Metal: AA5083
Filler Wire: ER5183
Thickness: 4 mm
Process: GMAW-P
Shielding Gas: 99.995% Ar with moisture content <2 ppm.
WPS parameters
I-90-120 AMP (2G position)
V-18-19 V
Travel Speed-350-450 mm/min
Regards,
Maulik H. Thakkar
Welding Engg & Metallurgist
L&T, Hazira, Surat
09924732922
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