(FCAW) Flux-Cored Arc Welding
Flux-Cored Arc Welding (FCAW) is defined as "an electric arc welding" process that uses an electric arc to produce coalescence between a continuous filler metal electrode and the base material".
The process may be used with or without a shielding gas. With gas shielded flux-cored wire, additional shielding agents are provided by a flux contained within the tubular electrode. An externally supplied gas augments the core elements of the electrode to prevent atmospheric contamination of the molten weld metal. FCAW is also known as Cored-Rod Welding or Cored-Wire Welding.
When it is used with shielding gas, the process equipment is virtually identical to that of GMAW.
With special voltage sensing feeders it is possible to do high quality flux-cored welding with a constant current (cc)-stick welding power supply. FCAW is principally intended for use with carbon steel, stainless steel and low-alloy steels. The process can use DCEP or DCEN polarity, and is suitable for all position welding with the correct filler metal selection, depending on the flux composition.
Why Use FCAW?
The process may be used with or without a shielding gas. With gas shielded flux-cored wire, additional shielding agents are provided by a flux contained within the tubular electrode. An externally supplied gas augments the core elements of the electrode to prevent atmospheric contamination of the molten weld metal. FCAW is also known as Cored-Rod Welding or Cored-Wire Welding.
When it is used with shielding gas, the process equipment is virtually identical to that of GMAW.
With special voltage sensing feeders it is possible to do high quality flux-cored welding with a constant current (cc)-stick welding power supply. FCAW is principally intended for use with carbon steel, stainless steel and low-alloy steels. The process can use DCEP or DCEN polarity, and is suitable for all position welding with the correct filler metal selection, depending on the flux composition.
Why Use FCAW?
 | » | High-quality weld deposit with excellent appearance |
| » | Can be used to join many types of metals over a wide thickness range |
| » | Relatively high electrode efficiency and process duty cycle |
| » | Excellent weld penetration simplifies joint design |
| » | The arc is visible and easy to use |
| » | Because of its greater tolerance for base plate contamination, FCAW requires less pre-cleaning than GMAW |
| » | Deposition rate is up to four times greater than SMAW |
| » | The use of self-shielded electrodes eliminates the need for flux handling or gas apparatus, and is more tolerant of windy conditions present in outdoor construction than gas-shielded processes |
Limitations
| » | Presently limited to welding ferrous metals and nickel-based alloys |
| » | Process produces a slag covering that must be removed |
| » | FCAW electrode wire is more expensive on a weight basis than solid electrode wires, except for some high alloy steels |
| » | Equipment is more expensive and complex than required for SMAW; however, increased productivity usually compensates for this |
| » | In general, more fume is generated than with GMAW |
| source:careersinwelding.com |
D&H Secheron provides the best quality of Flux Cored Wire . Know more about the Flux Cored Wire offered by D&H Secheron. It is used in many industries including marine sector, railways & well-known projects all over the country & even internationally.Visit our website to know more about Flux Cored Wire.
ReplyDelete