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Anonymous Poster

Function of Flux

06/28/2010 11:43 PM

During SMAW the solidified layer of flux deposits over the weld bead, because flux being lighter in density compared to weld bead.But during over head welding why not this flux go up.
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Tornado
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#1

Re: Function of Flux

06/28/2010 11:51 PM

Repeated Post Warning

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lyn
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#2

Re: Function of Flux

06/28/2010 11:59 PM

This is the second time for this question.

When you weld normally, you point the welder down and the metal pushes the flux, "up".

When you weld overhead, you point the welder up. This reverses the polarity of the ground and the metal goes up and pushes the flux, "down".
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Doorman
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#3
In reply to #2

Re: Function of Flux

06/29/2010 10:57 AM

"When you weld overhead, you point the welder up. This reverses the polarity of the ground and the metal goes up and pushes the flux, "down"."

Intriguing. Does this phenomenon also manifest in the southern hemisphere?

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lyn
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#4
In reply to #3

Re: Function of Flux

06/29/2010 11:00 AM

Of course. But, as you might suspect, the effect is reversed.

It's nice to have your own straight man.
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Doorman
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#5
In reply to #4

Re: Function of Flux

06/29/2010 11:16 AM

Perhaps you have read my bio:

Available from LynDoor® Industries.

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Anonymous Poster
#8
In reply to #2

Re: Function of Flux

07/01/2010 9:27 AM

I am confused, how automatically the polarity changes in overhead welding. please comment
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mike k
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#6

Re: Function of Flux

06/29/2010 11:38 PM

I think the key word is this situation is 'affinity'. Two beads of water will join into one. 'Surface tension' will keep the bead together. It's what fluids do. During welding, you are dealing with fluid metal, and fluid flux. The metal has affinity for metal, so down or up, the metal combines. The flux has some affinity for the metal, being a fluid, but surface tension of the metal excludes the flux.

The flux is mostly to keep air from affecting the molten metal while it solidifies.

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lyn
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#7
In reply to #6

Re: Function of Flux

06/30/2010 7:36 PM

Oh Man,

You take all the fun out of it.

I did get a chuckle out of, "It's what fluids do".

GA.
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Anonymous Poster
#9
In reply to #6

Re: Function of Flux

12/07/2010 5:58 AM

apsulutelyy right sir

4 chem afinity

in f/n 2 recover d metal n 2 mk d slag

flux like lime, lime stone ... added..
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