To start, gather up some clean metal scraps. He decided to use a lump of magnesium as a sacrificial electrode. Grind, brush and wipe away all potential contaminants. Clean steel weld Figure 6C: If you enjoyed this, why not follow a feed to find out when we have new things like it? The best way to prevent sugaring is to back purge the weld with argon shielding gas or reduce welding amperage.
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Torch Angle and Movement

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This occurs with arc welding such that the atoms of each piece of metal bond together with shared electrons to become one solid or homogeneous piece of metal. Figure 1 - Micro-TIG welding repaired the damage in this water-line hole. One of the first things you should have learned about welding is to clean materials prior to welding. Made a world of difference. As long as you have achieved complete fusion between the filler metal and the base plates and when appropriate, the steel backing bar , you have successfully joined the metal together into one homogenous piece.
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Selecting The Right Welder : Modern Machine Shop

Then back off two or three amps and add filler. It was thought that if the powder form was used for these welds, the flux could lift off the surface without being melted. Ideal aluminum weld Figure 2C: TJS Welding and Fabrication. Get filler metal charts to let you choose correct rods for whatever materials you are welding Alcotecs Aluminum filler metal chart.
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Turn the workpiece as necessary. The TIG process is not unlike welding with an oxy-acetylene torch. Notify me of new posts by email. The most common TIG welds are illustrated below. One of the most vital controls for welding aluminum is balance, which maintains the cleaning versus penetration levels on aluminum. It is advantageous to weld a joint from side to side to control warpage. The foot control allows you to slowly initiate the heat, and after the weld is complete you can slowly reduce the heat.
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