What Are the Different Kinds of Welding?
Welding is a process of joining metals by melting parts and then using a filler to create a strong joint. It can be done using various energy sources, including gas flame or electric arc, to ultrasound or a laser. Until the start of the 20th century, this was done via a process known as a forge, this consisted of heating up pieces and then hammering them until they were amalgamated. However, with the advent of electricity, the process became easier and a great deal faster, and played an important part during World War I and II. There are now different processes in use today.
An arc weld is achieved through the use of an electrical current and can be done using inexpensive equipment.
A gas weld is widely used when repairing items, especially pipes and tubes. It is very common in the jewelry industry and can connect plastics and other materials which are unable to withstand higher temperatures.
A resistance weld uses additional sheets of metal that will encase pieces that need to be welded together. It is considered the most environmentally-friendly, however, can be expensive, as it needs costly equipment which cannot be used in every situation.
Energy beam welds, which are also called laser beam welds, is one of the most modern techniques used today. This is a faster and more accurate method, however, due to the high equipment cost, it does make it prohibitive for most industries.
Welding, unfortunately, cannot be done with every kind of metal, as some, like stainless steel, is prone to cracking and distortion when it gets overheated. Alloys are also problematic because it is difficult to know what the exact chemical composition of the metal is. This industry has become more automatized over the past few years, and the use of robots is commonplace in some industries, such as the auto manufacturing plants.
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