Voltage primarily controls the arc length, while wire feed speed determines the amount of current and heat being deposited. An excessively high flow rate can create turbulence, pulling atmospheric air into the weld zone and causing porosity.
Preventing Porosity in Mig Welding Thin Metal: Optimal Gas Flow Settings
Furthermore, flow rate is just as important as the mixture itself. For thin metal, a flow rate between 10 and 15 cubic feet per hour (CFH) is usually sufficient to shield the puddle without disrupting it.
The goal is to move swiftly and confidently, dragging the bead slightly behind the gun. Workpiece Preparation and Backing.
Preventing Porosity in Mig Welding Thin Metal Through Optimal Gas Flow
023-inch or even 0. 018-inch wire is highly recommended.
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