#FCAW #FluxCoredArcWelding #WeldingPPT #WeldingTraining #WeldingTechnology #Manufacturing #EngineeringEducation

Often referred to as "dual-shield" welding, this method uses both the internal flux core and an external shielding gas supplied through the torch nozzle.

For FCAW to work correctly, remember the 'Rule of 1's': Voltage up 1 volt = Width up 1/16 inch. Wire feed up 1 inch per minute = Penetration up by 1 millimeter. Let's look at the defects slide to see what happens when you violate these laws."

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.

The primary method for joining beams and columns in skyscrapers and bridges.

) and deoxidizers. This prevents porosity and purifies the weld metal.

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| Component | Function | |:----------|:---------| | | Supplies the electrical energy for the arc. Typically constant‑voltage, inverter‑based, with both DCEP and DCEN capability. | | Wire feeder | Advances the flux‑cored wire from the spool to the torch at a controlled rate. Uses grooved drive rollers (not smooth ones, which are for solid wire). | | Welding torch (gun) | Directs the wire into the weld joint and contains a trigger for wire feed control. For gas‑shielded FCAW, the torch also has a nozzle for shielding gas. | | Gas supply (for FCAW‑G) | Consists of a cylinder, regulator, flowmeter, and hoses. | | Ground clamp | Completes the electrical circuit through the workpiece. | | Control panel | Allows the operator to adjust wire feed speed, voltage, and other parameters. |

"Good morning. Today we are looking at Flux Cored Arc Welding—specifically, how the tubular wire does the work of two components: filler metal and shielding.

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: Relies entirely on the flux core to generate its own shielding gas. It is highly portable and ideal for outdoor use where wind might blow away external gas.

Must be matched precisely to the wire diameter to ensure efficient electrical transfer. Advantages and Disadvantages of FCAW