PROCESOS SOLDADURA 
PROCESOS SOLDADURA
# WHAT IS THE EFFECT OF AMPERAGE AND POLARITY IN THE GMAW (MIG-MAG) PROCESS? ## AMPERAGE (WIRE FEED SPEED) In the GMAW process, amperage is directly controlled by **wire feed speed (WFS)**. As wire feed speed increases, amperage increases proportionally. ### Effects of amperage variation: | Parameter | Low Amperage | High Amperage | |—|—|—| | Penetration | Shallow | Deep | | Deposition rate | Low | High | | Bead width | Narrow | Wide | | Heat input | Low | High | | Transfer mode | Short-circuit | Spray/Globular | **Low amperage** can cause: – Lack of fusion – Incomplete penetration – Unstable arc – Excessive spatter (in short-circuit transfer) **High amperage** can cause: – Burn-through on thin materials – Excessive reinforcement – Undercutting – Distortion due to high heat input — ## POLARITY ### DC
Knowledge and control of these variables are essential for producing consistent welds of satisfactory quality. The variables analyzed…
