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Tig welding a T fillet joint with Nick break test
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Tungsten Inert Gas (TIG) welding is a popular welding process used for creating high-quality, precise welds. Welding a T-joint or T-fillet joint with TIG requires careful preparation and execution. Here's a step-by-step guide to TIG welding a T-fillet joint: • Prepare the materials: Gather the metal pieces you'll be welding together. Ensure they are clean, free from rust, grease, or any other contaminants. Use a wire brush or a grinder to clean the joint area, creating a smooth and shiny surface. • Set up the welding equipment: Install a suitable tungsten electrode in the TIG welding torch. The type of tungsten electrode you choose depends on the base metal you're welding (e.g., thoriated, ceriated, or pure tungsten). Consult the electrode manufacturer's recommendations for the specific metal you're working with. Set the welding machine to the appropriate settings, such as current, gas flow rate, and shielding gas type. • Fit the joint: Position the two metal pieces to form the T-joint, ensuring they are aligned correctly. Use clamps or other fixtures to hold them in place securely. The joint should have a small gap between the two pieces, typically around 1-2 mm, depending on the thickness of the metal. • Shielding gas: TIG welding requires a shielding gas to protect the weld area from atmospheric contamination. Typically, argon gas is used as a shielding gas for most applications. Connect the gas supply to the TIG torch and set the flow rate according to the manufacturer's recommendations. • Preheat (if necessary): Some metals, particularly thick or heat-sensitive ones, may require preheating to reduce the risk of cracking. If preheating is necessary, heat the joint area to the recommended temperature using a preheating torch or other suitable methods. • Start the arc: Position the TIG torch close to the joint area, with the electrode tilted slightly towards the direction of travel. Depress the foot pedal or initiate the arc by using the appropriate switch or button on your welding machine. A high-frequency start feature is commonly used for TIG welding to initiate the arc without touching the base metal. • Welding technique: Hold the torch steady and move it along the joint in a controlled manner. Maintain a consistent travel speed and an appropriate distance between the tungsten electrode and the work piece. The angle between the torch and the joint should generally be around 10-15 degrees. • Fill the joint: As you move the torch, dip the filler rod into the molten puddle at the leading edge of the joint. The filler rod should match the base metal to ensure compatibility and proper fusion. Control the amount of filler metal added to create a smooth, even weld bead. • Continue welding: Progress along the joint, adjusting your travel speed and filler rod deposition as necessary. Aim to create a well-penetrated, uniform weld with good fusion between the base metal and filler rod. • Complete the weld: Once you reach the end of the joint, gradually reduce the current and lift the torch away from the weld. Allow the weld to cool naturally, avoiding rapid cooling methods that may lead to cracking or distortion. • Post-weld cleaning and inspection: After the weld has cooled, use appropriate tools to remove any slag or spatter from the surface. Inspect the weld for any defects, such as cracks or porosity. Perform any necessary post-weld processes, such as grinding or cleaning, to achieve the desired finish. • join in the chat with our Socials: • / discord • / weldtechsol • / weldtechsolutions1 • / weld.tech.solutions • • #weldtube #weldingtipsandtricks #howto #welderlife #stickwelding #stickwelder #games #gameswelding #weldingfabrication #tigwelder #welder #howtoweldforbeginners #howtoweldingforbeginners #howtoweld
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