WELDING Report-1.doc - WELDING Abstract Shielded metal-arc welding with the transformer welding machine depends upon this fundamental fact that when one

WELDING Report-1.doc - WELDING Abstract Shielded metal-arc...

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WELDING Abstract Shielded metal-arc welding with the transformer welding machine depends upon this fundamental fact that when one side of the welding circuit is attached to a piece of steel, awelding electrode connected to the other side and the two brought into contact, an arc will be established. If the arc is properly controlled, the metal from the electrode will passthrough the arc and be deposited on the steel. When the electrode is moved along the steelat the correct speed, the metal will deposit in a uniform layer called a bead Introduction Welding is a fabrication or sculptural process that joins materials, usually metals or thermoplastics, by using high heat to melt the parts together and allowing them to cool causing fusion. Welding, technique used for joining metallic parts usually through the application of heat. This technique was discovered during efforts to manipulate iron into useful shapes. Welded blades were developed in the 1st millennium CE, the most famous being those produced by Arab armourers at Damascus, Syria. The process of carburization of iron to produce hard steel was known at this time, but the resultant steel was very brittle. The welding technique—which involved interlayering relatively soft and tough iron with high-carbon material, followed by hammer forging—produced a strong, tough blade. welding is the fusion of two pieces of metal by an electric arc between the pieces being joined – the work pieces – and an electrode that is guided along the joint between the pieces. The electrode is either
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