MIG is similar to MMA in that heat is produced by forming an arc between a metal electrode and the workpiece; the electrode melts to form the bead. The main differences are that the metal electrode is a small diameter wire fed from a spool and an externally supplied shielding gas is necessary. As the wire is continuously fed, the process is often referred to as semi-automatic welding.
The pulse mode was developed as a means of stabilizing the arc at low current values below the threshold level, to avoid short-circuiting and spatter. Metal transfer is achieved by applying pulses of current, each pulse having sufficient force to detach a droplet.
Castolin has developed the special EnDOtec (cored wire) and CastoMag (solid wire) alloy ranges for industrial wearfacing, repair and joining applications supported by a complete high quality, MIG / MAG welding equipment range based on latest technology.
