7018 vertical-up stringer-bead welding...
Back to basics for vertical-up - trying to do vertical-up pad-welds
with 3.2mm (1/8th-inch) 7018's.
- 3.2mm (1/8th-inch) 7018 rods.
- 95Amps (or 100A)
- steel is low-carbon 12mm (1/2-i9nch) thick
need to puddle-up a weld-pool under the arc - so rod end about 3mm off
the plate but only a millimetre or so above the weld-pool
(which differs from getting good penetration fillet-weld on-the-flat
with 7018 - where keep very very short arc in fillet corner and run
fast enough to keep weld-pool behind rod and arc with apex just under
slight upward slope of rod (not too much - only about 5deg to 10deg
down - so can see weldpool but not "blow" it - let it advance as it
95A (or 100A) is right - need goodly Amps to flatten weld pool by
making spread by being fluid (too low Amps and deposit is very humped
(apart from anything else))
no weave (eg one wire-diameter which still counts as "stringer" (?))
seems useful or necessary - when Amps correct (good clean burn)
run-out seems to be about 2/3rds of rod-length
Does this sound anything like right?
Anyone give me a plan to practice to?
Should be able to go practice more welding in the next few days.
If I could do a beautiful pad-weld vertically, do you reckon good 3-G
weld would follow?
BTW - was pipe where someone had done beautiful circumferential 7018
pad weld in the 6G position - apparently that welder went on to
convincingly get his 6G SMAW Coding very shortly afterwards...
Thanks in advance
8 years ago