Flux Cored Arc Welding Ppt Work _hot_ Review

Look at Slide 4. When you pull the trigger, the flux inside the wire melts microseconds after the wire skin melts. That timing is critical. If your stick-out is too short, the flux doesn't have time to react, and you get porosity. If your stick-out is too long, the wire overheats before the arc.

To get the cleanest weld with FCAW, maintain a (the distance from the contact tip to the metal). For most wires, this is between 1/2" to 1". This pre-heats the wire and ensures the flux activates correctly. flux cored arc welding ppt work