Welding Process of Galvanized Square Tube
Galvanized square tube welding method and the general low-carbon steel is the same: welding the first layer of welding in the weld, try to make the zinc layer and vaporization, evaporation and escape the weld, can greatly reduce the liquid zinc Stay in the weld. In the welding of the weld, the same layer in the first layer as much as possible so that the zinc layer melting and vaporization, evaporation and escape the weld, the method is the first part of the electrode forward out about 5 ~ 7mm or so, when the zinc layer melt and then return to the original position to continue to apply welding. And then welding and vertical welding, such as the use of short slag electrode such as J427, undercut tendency will be very small; if the use of front and rear transport technology, but also can be defect-free welding quality. Welding process control of the pipe before the preparation of welding with the general low-carbon steel is the same, need to pay attention to is to carefully handl...