Internal UC in root pass

Date 01-21-2008 18:18

Lately I have had some problem with suck back in the root pass in the bottom section of the pipe. (5-7 o'clock). Am I just goin too hot and letting the metal fall back out at me or what? Too slow or maybe a combination of the two?

Thanks for any input!

GH Weidman

By weldgault (**)

Date 01-21-2008 23:45

Gravity on molton metal is hell, cool er off. John

By js55

Date 01-22-2008 14:46

What process, what material?

By 1mancrew (**)

Date 01-23-2008 02:55

SMAW 6010 5P+ on 12", .375 wall pipe.

By Aspirate (**)

Date 01-23-2008 04:47

when i get this problem, its directly related to how i travel with the rod (not necessarily the travel speed) either whip or dragging.
generally, i run hotter on the bottom than the top of the pipe. if stay there too long, it can actually re-consume the weld.

By trlblzr302 (**)

Date 01-23-2008 12:28

With a 1/8" rod and 3/32" land and gap and about 90-95 amps, try a dragging motion... stay in your joint with a short arc and keep a decent
sized key hole....Not too big... Make sure you flow in evenly to both sides of the joint and compensate for any hi-low on the fit up. ( This works well for me)....

Brian

By 1mancrew (**)

Date 01-27-2008 17:38

Thanks all for the input. I had an opportunity to weld on some pipe the other day and I started to cool down a bit at the bottom, used a dragging motion and I also whipped the rod back and forth just a little bit and it seemed to stack up quite nicely.