Hello everybody,
I would like to ask if there is any solution to this problem. I encountered a problem called taper burning while welding (5G/Up-hill position) the root of a CS pipe dimension 4" dia. & 20mm Wall thickness with E-6010 of 2.5 mm size in a very wide root gap of 3.15 mm and root face of 0mm. Power source used: Lincoln Square Wave & Welding polarity is DC Positive. The included angle of above joint is 60 0 and it is prepared by grinding rather than machining.
This particular problem only observed when the electrode angle (Angle between the electrode & tangent to the pipe at that point) is very acute. I don’t know the root cause of this problem but can I take this as it is due to poor design of the electrode or wrong welding angle?
Can someone explain me why this taper burning is observed in this particular condition and what is the science behind this? What should I do to check this kind of taper burning? Your help would be really appreciated.
Regard’s
Ninad
You should change the rod angle. With 6010 it is better to keep the rod no more 15 degrees off the perpendicular. Since you like such a large root opening, the problem can be rectified by lowering your amperage.
Your parameters are to far out.
Try this below. This works excellent on 2" pipe.
Brand of E6010 rods>>Lincoln E6010 5P+ ( Excellent rod).
Material P1-P1...2 " sch.160......Carbon Steel
Joint type Single bevel - V-groove
Position 6G
Root Face 2.8mm - 3.0mm (a liittle less than 1/8 in.).
Root gap 2.3mm - 2.5mm (approx. 3/32 in. or less)
Root pass E6010 >>>>3.2mm (1/8 in)>>>>>>75 - 85 amps.
Fill passes E7018>>>>2.4mm (3/32 in)>>>>>>90 - 100 amps.
By Abani
Date 03-04-2006 05:16
Please suggest something what to do for that problem if he has to maintain the condition given by him??
