Miller Electric

Welding Discussion Forums

Home » Resources » Communities » Welding Discussion Forums
 
Miller Welding Discussion Forums - Powered by vBulletin

Page 2 of 2 FirstFirst 12
Results 11 to 12 of 12
  1. #11
    Join Date
    Mar 2007
    Location
    Deltaville, VA
    Posts
    2,239

    Default

    Clavacle,

    Looks to me like there's still contamination in the bead. Hard to tell if it's coming from the base material or from the tungsten. What type tungsten are you using (old school taught pure for the Sync 250--not anymore)? I would recommend trying 1/8" zirconiated. The second photo, towards the right side, shows something (contamination) on the bead which may have come from the tungsten.

    Another factor/question which comes to mind is how was the base metal cut? Was it sheared, saw cut, or cut with plasma. There have been documented cases where the base material, when cut with plasma, introduced a degree of contamination to the weld. Poster (can't remember name) had problems building an aluminum skiff with metal which had been plasma cut. Found he had to grind the edge to remove the contamination.

    Balance set to 8 (more penetration) seems a little high, but the etched zone (where cleaning occured) seems more than adequate. I don't think that's your problem.

    Don't know what your amp setting was, but I'd try running a little hotter and faster when using 5356 filler.

    Also, I'm assuming you did a good job of cleaning the filler material (scotchbrite and acetone wipe). If not, that can also introduce oxides into the weld.

    One other thing, I'm assuming you're keeping your filler in the covering gas envelope. Removing it completely and then moving back to the puddle will also introduce oxides.

    Keep us posted.
    Last edited by SundownIII; 08-20-2007 at 01:57 PM.

  2. #12
    Join Date
    Nov 2006
    Location
    Lake of the Ozarks MO
    Posts
    3,583

    Default

    I get that look on a "wash" over
    I see where it had the tungsten touched before the present welding.

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  

Warning: Function split() is deprecated in /mnt/stor3-wc1-dfw1/357822/357839/www.millerwelds.com/web/content/lib/footer.inc.php on line 82

Welding Projects

Special Offers: See the latest Miller deals and promotions.