Robert Mullins
Member
- Messages
- 222
- Location
- Salisbury, uk
I've been issued 'familiarc DW-A50' flux cored wire to use at work to weld heavy wall pipe, 70mm wall, and plate
Due to poor joint fit-up we've had to fill gaps, up to 3/4"/20mm or there's about, with the solid wire, then fill and cap over this: apparently the flux cored wire doesn't weld properly on solid wire: (I know for certain that mig welding does not weld properly over a MMA tack)
What I can't prevent at the moment is 'roll'
With multi pass fillets, the weld profile is poor, the weld metal sagging away from the vertical plate and bulging/hanging over the lower bead: I've talked with several of the other welders, who deem my efforts to be satisfactory
Here's a brief summary of what I have tried;
Removing the mill scale and 'shellack' from the welding zone:
Increasing/ decreasing the volts;
Wire speed up/down
Welding up/down any incline
A distinct side to side weave;
Pausing at the top edge
A rapid side to side weave,
Whipping the bead, a longitudinal back and forth motion:
I have not adjusted gas flow rate, it's supposed to be 16/19Lpm, and the mixture is argon 18% co2;
I'm beginning to doubt my abilities a tad at the moment, if a knowledgeable person out there knows what I'm doing incorrectly, how I can improve it, or put me in contact with a bona fide welding instructor, all help will be much appreciated: many thanks Robbie
Due to poor joint fit-up we've had to fill gaps, up to 3/4"/20mm or there's about, with the solid wire, then fill and cap over this: apparently the flux cored wire doesn't weld properly on solid wire: (I know for certain that mig welding does not weld properly over a MMA tack)
What I can't prevent at the moment is 'roll'
With multi pass fillets, the weld profile is poor, the weld metal sagging away from the vertical plate and bulging/hanging over the lower bead: I've talked with several of the other welders, who deem my efforts to be satisfactory
Here's a brief summary of what I have tried;
Removing the mill scale and 'shellack' from the welding zone:
Increasing/ decreasing the volts;
Wire speed up/down
Welding up/down any incline
A distinct side to side weave;
Pausing at the top edge
A rapid side to side weave,
Whipping the bead, a longitudinal back and forth motion:
I have not adjusted gas flow rate, it's supposed to be 16/19Lpm, and the mixture is argon 18% co2;
I'm beginning to doubt my abilities a tad at the moment, if a knowledgeable person out there knows what I'm doing incorrectly, how I can improve it, or put me in contact with a bona fide welding instructor, all help will be much appreciated: many thanks Robbie