Content tagged with "nonferrous"
Results: 3
Article
December 11, 2007
Finding poor-diffusion bonds in ferrous, nonferrous tubes
Figure 1
A common problem in laser welding is misalignment between the laser beam and the tube's seam. Two small portions of the weld seam, near the inner and outer walls, benefited from the weld heat; however, even in these locations, fusion likely wasn't thorough. Photomicrograph of... Read more...
Article
April 10, 2003
How to recognize, minimize weld smut
When I weld any aluminum alloy, I see a covering, light gray to black in color, over the weld. I see it when I gas tungsten arc weld (GTAW), but it's worse when I gas metal arc weld (GMAW). What is it? Does it affect the mechanical properties of the weld? How do I get rid of it? A common... Read more...
Article
February 27, 2003
Choosing tungsten electrode type, size for aluminum GTAW
I've heard different opinions about which size and type of tungsten electrode I should use to gas tungsten arc weld (GTAW) aluminum. Could you clear up this subject for me? As you know, we use direct current electrode negative (DCEN), or straight polarity, to weld steels and stainless... Read more...
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