Duralloy MIG 200 Owner's Manual

Contents

Duralloy MIG 200 Owner's Manual Manual pdf 11 page image

Two different welding processes are covered in this section(GMAW and FCAW), with the intention of providing the very basicconcepts in MIG welding, where a welding gun is hand held, andthe electrode (welding wire) is fed into a weld puddle, and the arcis shielded by a gas (GMAW) or flux cored wire (FCAW).Gas Metal ARC Welding (GMAW)This process, also known as MIG welding, CO2 welding, MicroWire Welding, short arc welding, dip transfer welding, wirewelding etc., is an electric arc welding process which fusestogether the parts to be welded by heating them with an arcbetween a solid continuous, consumable electrode and the work.Shielding is obtained from an externally supplied welding gradeshielding gas. The process is normally applied semi automatically;however the process may be operated automatically and can bemachine operated. The process can be used to weld thin andfairly thick steels, and some non-ferrous metals in all positions.www.duralloy.net.au | 1300 369 456BASIC MIG WELDING GUIDE11Flux Cored Arc Welding (FCAW)This is an electric arc welding process which fuses togetherthe parts to be welded by heating them with an arc between acontinuous flux filled electrode wire and the work. Shielding isobtained through decomposition of the flux within the tubularwire. Additional shielding may or may not be obtained from anexternally supplied gas or gas mixture. The process is normallyapplied semi automatically; however the process may be appliedautomatically or by machine.The angle of MIG torch to the weld has an effect on the width ofthe weld.The welding gun should be held at an angle to the weld joint.(See Secondary Adjustment Variables below).Hold the gun so that the welding seam is viewed at all times.Always wear the welding helmet with proper filter lenses and usethe proper safety equipment.CAUTIONDo not pull the welding gun back when the arc isestablished. This will create excessive wire extension(stick-out) and make a very poor weld.The electrode wire is not energized until the gun trigger switchis depressed. The wire may therefore be placed on the seam orjoint prior to lowering the helmet.It is commonly used to weld large diameter electrodes in theflat and horizontal position and small electrode diameters in allpositions. The process is used to a lesser degree for weldingstainless steel and for overlay work.MIG 200OWNER’S MANUAL