Causes and consequences of arc blow are described, and means of overcoming it are presented.. Arc blow tends to occur if the material being welded has residual magnetism at a certain level, particularly when the weld root is being made, and the welding current is direct current (DC positive or negative). This is due to interaction between.. Causes of Arc Blow. Arc blow is primarily caused by magnetic forces that are present during the welding process. These magnetic forces can be generated by a variety of factors, including the Earth's magnetic field, residual magnetism in the base metal, or even magnetic materials present in the vicinity of the weld. Effects of Arc Blow
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Arc blow refers to the deflection or deviation of the welding arc from its intended path. It can cause the arc to wander or spiral, resulting in uneven heat distribution and potential defects in the weld. This phenomenon can be challenging to manage and can lead to compromised weld quality if not addressed properly.. Magnetic arc blow is caused by an unbalanced condition in the magnetic field surrounding the arc. This unbalanced condition results from the fact that at most times, the arc will be farther from one end of the joint than another and will be at varying distances from the workpiece connection. Imbalance also exists because of the change in.
