What Is Welding?

Arc welding makes use of an electrical current.
Welders wear special helmets and gloves for protection.
Welders use extreme heat that is supplied by either an electrical current or gas to connect two metal surfaces.
There are various types of welding.
A closeup of welding.
Welding is the act of joining two metals or thermoplastics by heating them.
Welding goggles.
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  • Written By: Diana Bocco
  • Edited By: Bronwyn Harris
  • Last Modified Date: 11 January 2015
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Welding is the process of joining metals by melting the parts and then using a filler to form a joint. It can be done using different energy sources, from a gas flame or electric arc to a laser or ultrasound.

Until the beginnings of the 20th century, welding was done via a process known as forge welding, which consists of heating up the pieces to be fixed together and then hammering them until they amalgamate. With the advent of electricity, the process became easier and faster, and it played an important part of the industry scene during World War I and II. There are different welding processes in use in modern times:

Welding cannot be done with all types of metals, as some materials, such as stainless steel, are prone to cracking and distortion when overheated. Alloys are particularly problematic, since it's hard to know the exact chemical composition of the metal. Welding has become highly automatized over the last decade, and the use of robots is now commonplace in certain industries, such as the automotive manufacturing plants.

It is possible to weld items in unusual conditions, including underwater and in outer space. Underwater welding is widely used in the repair of pipelines and ships, while that performed in space is currently being researched as a possible way to put together space stations and other structures.



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Post 11

How and why do people choose welding?

Post 10

Can you weld jewelry to cast metal steel?

Post 9

I have seen artists use welding in a lot of really creative ways. Recently I saw this sculpture that had been made from thousands of pieces of salvaged rebar welded together. It was hard to describe what it looked like, but imagine an explosion that someone was able to pause half way through.

Despite its size and scope, the sculpture seemed to have this feeling of movement and dynamic energy. It was amazing to see.

Post 8

I have heard that welders make good money and have a lot of job security, even in a bad economy like this one. Where do I get training in welding and what types of welding are the most in demand right now?

Post 5

can i build a ship's hull with a welding machine?

Post 4

yes cast iron can be welded.

Post 3

effect of moisture on welding

when moisture is in the weld area it's become crack and lamination. we can find in such NDT in dye penetrant testing

Post 2

what is the effect of moisture on welding?

Post 1

1. Can you please add a date to the postings?

2. Can someone weld on a steel casting and if so, are there any extra cautions needed?

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