Gas Metal and Flux-Cored Arc Welding
Wire welding with gas metal and flux-cored arc welding, followed through an apprentice's move to the gun at a fabrication shop in Pasadena, on the Houston Ship Channel: constant-voltage power sources, feeders, guns and cables, solid, flux-cored and metal-cored wires and their AWS classifications, shielding gases, short-circuit, globular, spray and pulsed transfer, settings, stickout and deposition, gas-shielded and self-shielded flux-cored wire, metal-cored wire and weld cost, all-position fillet and groove welds, and a capstone qualifying a flux-cored procedure for bridge girder flange splices under AWS D1.5.
WLD-210 12 lessons · 3 h 26 min ▶ Video lessons coming soon
Offered by HSM University · Welding
This is the American version of this course. See the Canadian version.
What you'll learn
- Describe how GMAW, gas-shielded and self-shielded FCAW and metal-cored welding work, explain arc self-regulation on a constant-voltage power source, and calculate heat input for a wire process
- Set up and maintain constant-voltage power sources, wire feeders, guns, liners, contact tips and cables, choose polarity, apply duty cycle, and allow for cable voltage drop
- Explain the construction of solid, flux-cored and metal-cored wires and read CSA W48 and AWS wire classifications, including usability, shielding gas, toughness and hydrogen designators
- Select shielding gases and mixtures by ISO 14175 group, set and check gas flow, prevent drafts and leaks, and estimate gas consumption and cost
- Explain short-circuit transfer, set wire speed, voltage and inductance for it, and recognize its lack-of-fusion risk and code restrictions on plate
- Explain globular and spray transfer, the transition current and the role of argon, and apply spray transfer in the flat and horizontal positions
- Explain pulsed spray and controlled short-circuit processes, synergic and adaptive control, and the determination of heat input from instantaneous power or energy
- Relate wire feed speed, current, electrode extension, voltage, travel speed and gun angles, calculate melting and deposition rates, and check settings against a procedure
- Apply gas-shielded and self-shielded flux-cored wires correctly, including polarity, extension, technique, slag removal, fume control and the limits of self-shielded wires
- Use metal-cored wire and mechanized carriages, estimate the cost of a weld, and identify the main ways to raise welding productivity
- Prepare groove joints and make fillet and groove welds in all positions with flux-cored and pulsed wire, with correct sequence, cleaning and inspection between passes
- Plan, weld, test and document a procedure qualification for a flux-cored groove weld, write production ranges and check production welds against them
Course content
12 lessons · 3 h 26 min total · final exam
- 1 How GMAW and FCAW work 18 min · quiz
- 2 Power sources, wire feeders and guns 18 min · quiz
- 3 Wire electrodes and classifications 17 min · quiz
- 4 Shielding gases and gas delivery 17 min · quiz
- 5 Short-circuit transfer 17 min · quiz
- 6 Globular and spray transfer 16 min · quiz
- 7 Pulsed spray and advanced waveforms 16 min · quiz
- 8 Setting voltage, wire feed speed and stickout 17 min · quiz
- 9 Flux-cored arc welding: gas-shielded and self-shielded 17 min · quiz
- 10 Metal-cored wires and productivity 16 min · quiz
- 11 All-position fillet and groove welds with GMAW and FCAW 16 min · quiz
- 12 Capstone: qualifying a production FCAW procedure on the bridge girder 21 min · quiz
- E Final exam 20 questions
Requirements
Recommended background. You can start any course at any time.
Description
Wire welding with gas metal and flux-cored arc welding, followed through an apprentice's move to the gun at a fabrication shop in Pasadena, on the Houston Ship Channel: constant-voltage power sources, feeders, guns and cables, solid, flux-cored and metal-cored wires and their AWS classifications, shielding gases, short-circuit, globular, spray and pulsed transfer, settings, stickout and deposition, gas-shielded and self-shielded flux-cored wire, metal-cored wire and weld cost, all-position fillet and groove welds, and a capstone qualifying a flux-cored procedure for bridge girder flange splices under AWS D1.5.