Welding is a time-tested fabrication process or sculpti […]
Welding is a time-tested fabrication process or sculpting process of materials, usually metal, using high temperatures to melt and fuse parts together. It should be noted that, however, pressure can also be used to aid the process or be used exclusively to produce a weld.
"The process of welding doesn't merely bond the two pieces together as in brazing and soldering, but, through the use of extreme heat and sometimes the addition of other metals or gases, causes the metallic structures of the two pieces to join together and become one."
It is usually distinguished from lower temperature metal fusing techniques like brazing, or soldering, which do not usually melt the base metal.
Welding usually also involves the use of something called a filler material. This, as the name suggests, is used to provide a "filler" or pool of molten material that helps facilitate the formation of a strong link between the base metal parts.
Most welding processes will also require some form of shield to protect both the main components and filler from being oxidized during the process.
What are the types of welding?
Welding has been used in metallurgy for millennia with forge welding performed by blacksmiths as the only real viable technique. This all changed in the 19th century when newer methods like arc-welding and oxyfuel welding were developed.
Some of the most common welding processes commonly employed day include:
What is the strongest type of weld?
This is not as simple a question to answer as it may first appear. The best weld depends on the base material in question and its final intended use. From TIG to Plasma Arc Welding, each technique has its own unique advantages and disadvantages over the others.
The strongest type of weld could be stick welding: "if pure strength that counts and the thickness of the material that can be welded, then stick welding is the winner. As we said, the stick is the only one capable of welding cast iron and works on both dirty materials and in harsh weather conditions."
But that doesn't necessarily mean stick welding is the best choice for all scenarios. "However, MIG can be applied to many metals of varying thickness, while TIG produces the highest quality welds, especially when it comes to thin metals."
It will also completely depend on the metal you wish to weld. Aluminum, for example, is a fairly soft metal and can't cope with too much heat. For this reason, there are only two viable welding techniques that can be used, MIG and TIG.
Of these two techniques, TIG is widely considered to be the de-facto technique for best results.
Steel, on the other hand, is a much beefier metal when compared to aluminum. For this reason, it can take a lot more punishment before compromising its strength. But, which welding technique provides the strongest weld depends on the thickness of the material.
MIG is generally considered to be the best technique for most steel applications. For thicker steel sheets, many attest to the superiority of stick and flux welding.