Hey guys,
We've recently switched to a metal cored wire from a solid L-59 wire. What we're welding is similar to a B-U9 joint on I beam. With dye pen testing after back gouge. What I'm running in to is cracks and porosity. I'm making sure they are cleaning between passes, I checked their amps and even gas flow pressure, but I can't seem to figure out whats happening. Any advise would be greatly appreciated.
Thank you,
Scott
Check the tip to work distance.
The importance of the distance from the contact tip to the arc is often overlooked. Different manufacturers use different terms, i.e., electrical stick out, contact tip to work distance, etc., but the concern is the same. It is a distance that must be controlled, but rarely do WPSs list the dimension suggested by each manufacturer. It is dependent on the specific manufacturer and the classification of the electrode, i.e., what works for no manufacturer's electrode is not appropriate for the same classification manufactured by another manufacturer.
Al