Hi all! This is my first post on the Miller forum.
I use my Econotig for general hobby welding, and I occasionally use it for my X-ray repair business. One problem that I recently encountered is I was trying to repair a broken metal bracket that holds a rear cover onto a Dental X-ray tube head. From the look and feel of the metal, I was certain that it was cast Aluminum, but I had a heck of a time trying to Tig weld it. The broken section of the bracket is only about 0.25 in wide by 0.125 in think, and about 3 inches long. The metal seems to be very brittle, as it breaks very easily when flexed even a small amount. When trying to Tig weld it, the metal just melts into a very rough looking blob, and will not accept Aluminum filler rod. After many frustrating attempts, I began to wonder if maybe the metal isn't Aluminum, and is rather Magnesium. So, could anyone please tell me how I could test the metal to determine if in fact it is Magnesium instead of Aluminum? BTW - I'm using pure Argon, with 1/16 inch Thoriated Tungsten.
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Thread: Aluminum or Magnesium?
01-13-2008, 07:30 PM #1
Aluminum or Magnesium?Some people are like a Slinky... They aren't much good for anything, but they bring a smile to your face when you shove them down a flight of stairs.
01-13-2008, 08:23 PM #2
Unless you are welding in a vacum chamber that has been purged, welding magnesium would cause it to burn, and boy does it ever burn. (I guess grade 9 science was good for something after all. )Dynasty 200DX, first generationMakita 5" grinder
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01-13-2008, 08:24 PM #3Senior Member
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I believe you may want to consider some other kind of tungsten since i have heard this type is very harmful to your health without proper ventalation.
01-13-2008, 09:03 PM #4Ken
What else is there besides welding and riding. Besides that
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01-13-2008, 09:07 PM #5Some people are like a Slinky... They aren't much good for anything, but they bring a smile to your face when you shove them down a flight of stairs.
01-13-2008, 09:11 PM #6Some people are like a Slinky... They aren't much good for anything, but they bring a smile to your face when you shove them down a flight of stairs.
01-13-2008, 09:17 PM #7
01-13-2008, 09:21 PM #8
01-13-2008, 09:34 PM #9
09-30-2008, 10:28 AM #10Junior Member
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The filler rod is expensive (last purchase $92/Lb.) but a pound goes a long way! Trick is to find a supplier willing to sell less than 10 Lbs!
I saved all the shavings from turning a repair (lathe swarf) in a paper bag and threw it on a bonfire. VERY bright white, but quickly burnt itself out. Don't try that in your shop! So yes, keep the area clean from shavings and grinding dust.
Magnesium oxidizes very quickly, so any repairs need to be cleaned back to bare metal. I usually use a carbide "tree" in a die-grinder for this. It helps to direct the chips away from your clothing.Randy Forbes
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