12/23/2023 0 Comments Flux core welding tips![]() ![]() The EC500H earth clamp is one of our most popular models, it's very robust, super easy to fit, suits most welders. If your earth clamp is the 'cheap & nasty' type, we strongly recommend that you upgrade it. Defects at any point along the ‘current path’ (which includes the earth) can contribute to issues like porosity.Ĭheck the earth lead connection to the welder, the earth cable, the earth clamp, and the earth clamp connection to the job – and rectify any loose connections, worn components and defects. The integrity of the earth clamp and earth connection is critical. Platinum GL-11 ® wire is very tolerant to imperfect surfaces, making it very easy and hassle-free to use. ![]() Some gasless wires are more “fussy” than others about surface condition. If the test still exhibits porosity, then check the other potential causes in this article. Run some test welds on the test piece – if the test welds are free of porosity then it is very likely that surface contamination is the problem. If necessary, grind or linish the test piece to ensure contamination is completely removed. If the material being welded is dirty or if you suspect it has been contaminated, prepare a test piece that is completely clean and has not come into contact with oil. Gasless wire is usually more tolerant towards dirt, rust, paint and surface imperfections than standard MIG welding (with gas), however the fact remains that poor surface condition can still cause porosity and other problems.Īlso note that sometimes the parent metal can look relatively clean, but has been contaminated with grease or other substances that have penetrated the steel. One of the reasons why many welders prefer Weldclass Platinum GL-11 ® gasless wire is because it is very tolerant to variations in machine settings and characteristics, and is very resistant to porosity and other issues. Note that some gasless wires are more sensitive to variations in settings than others and are more prone to porosity problems. (Depending on the material thickness, you may also want to consider changing to a larger diameter wire - this will effectively reduce your voltage whilst allowing a higher weld deposition rate).Īlso - the following adjustments can also help to eliminate or reduce porosity ĭecrease travel angle (angle the torch closer to a perpendicular position) Try turning down the voltage setting on your welder. While the arc may feel smoother with a high voltage, one of the most common causes of porosity is too much voltage (heat). This is the opposite to MIG welding (with gas) where you would normally push the torch. A helpful way to remember this is "if there's slag, you drag". With Gasless and flux-cored wires, you should always drag the torch (similar to stick electrode welding), so that the torch is pointing back at the weld pool. If in doubt, check out our article on gasless wire polarity. Check that your earth lead is connected to positive (+) and the torch/wire to negative (-). The wrong polarity will cause porosity and a host of other problems too. Here’s a checklist to help you diagnose what is causing the problem: Porosity (air bubbles or pin holes in the weld metal) not only looks terrible, but it will also significantly weaken the weld joint. Having porosity problems with gasless welding wire? ![]()
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