Tear-off welding is the most common type of electrode welding in household metal tasks for beginners. And not only beginners have to weld a thin profile pipe with a separation. I will give you a couple of tips for pull-off welding to make it easier and the seam to be smooth and beautiful.
We take electrodes for pull-off welding with rutile or rutile cellulose coating. These electrodes have a very light re-ignition, interrupted, brought it back to the still red point and it immediately lights up again. Also, these electrodes, even in the hands of beginners, will not stick as often as electrodes with basic coating.
The most common rutile electrodes are brands
ANO-21
MP-3
MONOLITH
OK-46 is the best of all, there is an opportunity, buy them. Although in small settlements they are not particularly sold. There are almost 20 thousand people in my village, but they are not on sale. The assortment is scarce, I buy when I am in a regional city, or order via the Internet. Even in this, our small villages are lagging behind civilization, let's break through!
We start welding. The electrode is lit, the arc begins to melt the metal and a weld pool is formed. It is at the beginning of welding that we have a couple of seconds when it is not necessary to detach the electrode. The metal is cold, you need to warm it up and form a normal weld pool-the shape of an oval swamp of liquid metal.
After the appearance of this visible swamp of liquid metal, we do the separation of the electrode itself. We look through the mask at the red spot of metal, it can quickly fade. We don't need to miss this moment. Otherwise, the bath will completely crystallize and will have to be re-melted to a liquid bath. Slightly begins to fade, immediately re-poke with the electrode.
There is one trick at the very moment of the electrode detachment. Together with the separation from the welding place, from the weld pool, you need to move the electrode in this sequence. Back a little and move to the right. We do it quickly. It is necessary to quickly walk with an arc over the welding bath. and then you can put it aside - just to the right it is convenient for the wrist to do this movement.
Why do that? Rutile electrodes have a very mobile, flowable slag. It covers almost the entire weld pool. At the moment of separation and sharp passage of the arc backward over the weld pool, the arc with its pressure will throw back this slag layer a little back. The re-ignition of the electrode will be a little faster and the next portion of the metal will lie in a denser flake on the old flake of the metal that is starting to crystallize.
I noticed this moment in pull-off welding a long time ago. Often and a lot it was necessary to cook profile pipes. Nobody prompted, purely intuitively came to this welding technique. The seams are smoother and more beautiful with these simple movements. Try it, practice a little to bring the movement to automatism. The result will surprise and delight you!