• Question: Why is it that when I make a weld bead with a DC machine, the weld itself is not magnetized?

    Asked by david7 to Susana, Dave, Ben on 27 Jun 2013.
    • Photo: Benjamin Hall

      Benjamin Hall answered on 27 Jun 2013:

      I’m just going to be honest and say I have no idea what a DC machine is.

    • Photo: David Briggs

      David Briggs answered on 27 Jun 2013:

      Ditto, I’m afraid – I don’t do any welding in my work.

    • Photo: Susana Teixeira

      Susana Teixeira answered on 27 Jun 2013:

      Not an expert either so please take this as a guess only…

      I would say the weld can indeed be magnitized using DC, and it can even become a problem because it affects the arc . I reckon the high temperatures during welding can also play an important role, because it can help making electron spin orientations more random and this can reduce the ability of the material to be magnetised.

      Maybe?

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