New answers tagged current
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Why doesn't the work piece melt when arc welding if a lot of amperes run through our electrode?
The piece is big enough to not heat up.
The rest of the piece is a lot larger than the weld point. The weld point is as thick as an electric arc. Heat (outside the arc) equals I2R. I is current (...
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Why doesn't the work piece melt when arc welding if a lot of amperes run through our electrode?
In arc welding, the local spot where the arc intersects the workpiece is small, so the heat addition is very concentrated right at that spot. This makes it get much hotter than the surrounding metal.
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Why doesn't the work piece melt when arc welding if a lot of amperes run through our electrode?
I assume you're imagining something like ice and water where when it seems to go straight from solid to thin liquid, right? Metals (or at least alloys) don't generally behave that way.
You most easily ...
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