GMAW, GMAW -P, FCAW, MCAW, and SAW Flashcards
What is the main type of power source used in GMAW
DC welding current usually DCEP
What does GMAW-P use to make operations easier?
Adaptive synergic controls. This means you only have to adjust one parameter and the internal software will adapt to change the arc conditions.
What are the deposition rates of GMAW, MCAW, FCAW, SMAW; SAW?
Gmaw- 92-98% MCAW- 92-96% FCAW- 82-92% SMAW- -60-70% SAW- 100%
What metals cant be used with GMAW and why?
Cast iron cant be used and any metal that has low Malleability and cant be turned into wire
What it the maximum distance you can go from your wire feeder with GMAW?
6m (20ft) but you can get extensions for up to 30m (100ft)with steel wire and 15m (50ft) with softer aluminum
What are 2 variations of the FCAW process?
Self shielded and gas shielded
What are some advantages and disadvantages of FCAW?
Deeper penetration, higher deposition rates and high deposition efficiency. Less edge prep
What is FCAW and SMAW deposition rates?
SMAW- 6kg/he (12Ib./hr)
FCAW- 12kg (25Ib/hr)
What are some advantages of MCAW and what mode of transfer is best?
Fume levels are lower, less spatter and a high deposition efficiency 92-96%
Spray transfer is recommended for MCAW
MCAW has excellent penetration with good depth-to-width ratio
Why would AC current be used for SAW? Why is DCEP recommended for SAW over DCEN?
Multiple full passes are required or if arc blow is a problem.
DCEP gives deeper penetration while DCEN gives shallower penetration but a higher burn-off rate.
What are some advantages and disadvantages of SAW?
Large welds can be deposited in short periods of time, Large-diameter welding wires, sometimes 6.4mm (1/4 in.) Or more, and currents of 1500amps or more make this possible.
SAW can only be used in flat and horizontal
