Welding And The Metal Arc Welding Essay

1086 Words Feb 17th, 2016 5 Pages
Have you ever wondered how things like cars, buildings, and bridges are built? Welding is a widely used way to join structural and ornamental iron and steel. Many of the things we use in our daily lives are welded, like buildings, bridges and vehicles. Welding is the process of joining two metals with electricity and heat to make one piece of metal. The two main types of welding are arc welding and brazing. Arc welding is where electricity is used to melt a filler rod into the metal which penetrates and makes the metal one structural piece. There are many types of arc welding, including SMAW stick metal arc welding, GMAW gas metal arc welding and GTAW tungsten insert welding. Brazing is when an oxygen and acetylene mixture, called oxy- acetylene, is fed through a torch, mixed, and ignited, and a filler rod gets melted into the metal by the flame. The welding trade has become a major part of life for building, fixing and fabricating things much needed by this world, like buildings, bridges, vehicles and pipelines that keep the world connected with the people and resources necessary to be successful. Welding dates back many centuries to the middle ages. Early forms of welding were mainly soldering, until the eighteen hundreds when acetylene was discovered and people began to use the brazing process. During the nineteen hundreds the alternating current was invented, which is used today in almost all electrical welding processes. The nineteen thirties is when modern welding…

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