The lessons learned during the thorough investigations that followed to clarify the underlying causes, were essential to the progress of knowledge in this particular metallurgical matter. These ships suddenly broke in two as a consequence of exposure to high seas under particularly cold weather. Welding arc history was not without setbacks: the most famous example is the occurrence of spectacular failures which plagued eight all-welded ships of the Liberty class, built during World War II.
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The impressive technological advances developed during the twentieth century produced a mature series of variations on the theme of Welding arc, which effectively adapted the principles to ever changing and more exacting requirements. The origins of Welding arc processes can be found towards the end of the nineteenth century when trials were first attempted to master the newly discovered form of energy. To receive at no cost all the issues of PWL as they are published, please Subscribe. Using electric energy with proper characteristics, delivered by suitable equipment built for welding purposes, the arc is generated, maintained and directed into the workpiece through electrodes specifically designed to melt metal locally, to get the welding job done.Īn Article on the physical characteristics of the Electric Arc was published in our Practical Welding Letter No. Welding arc processes as a group are identified by the fact that the heat source for melting metal is due to an Arc Discharge of electrical energy. See on the same subject a different exposition in the new page reachable by clicking on Arc Welding.
Here we are going to enter into some more detail for the class of fusion welding methods making use of Welding arc processes. Welding processes can be grouped according to some general characteristic.įusion welds can be obtained by using a flame, generated by burning a gas. Description of less common or less used processes. Making some order in the large variety of processes. Welding arc Tips: using Powerful, Concentrated EnergyĬondensed information, practical know-how on Welding-arc, quick, time saving reference.
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