The welding current reference scope for wire diameter

Welding current and arc voltage: Welding current and arc voltage has an important influence on the weld shape and weld quality M, it is an important bee submerged arc welding parameters.

The spiral submerged arc welded pipe three wire technology, five welding wire welding current and arc voltage is provided by wire high current, low voltage wire and gradually transition to the 5 small current, high voltage setting manner. I wire current welding power supply in case of Nymphoides license. Possible, choose a large current. In the case in order to ensure adequate penetration of higher welding speed.

After over four wire current by 70% to 90% the proportion of pre-trace the current selection, price spiral welded pipe beveling larger wire requires more molten metal Ao, select the upper limit of the ratio; if reduces weld reinforcement reduction when deposited metal M inclination angle .1 and 5 wire after wire before not too large. Former wire angle is too large to a certain extent on the weld penetration;

After 5 wire angle is too large, the bottom of the spiral welded pipe prices contact tip easily with liquid slag formed 'arc' deeply affect the welding process for deep weld wire formed of narrow high .I possible, choose a smaller voltage to increase I wire arc penetration, S Cheuk W then test optimization, generally in the range of 31 ~ 34V preferred optional h limit when compared with the welding current or wire is too thick conversely choose express F limit: trailing four wire by successively increasing the voltage selection I ~ 3V, 5 wire arc voltage - generally within 39 ~ 43V range.