Welding is one of the most commonly used joinery processes in the industrial, commercial and DIY worlds. The process can be used to bond a huge variety of conductive materials, from metals and alloys to thermoplastics and other composites. It is estimated that around 12 million welding processes take place every single day, forming a crucial part of the manufacturing industry across the world!
In this article, we will be exploring the various types of welding and how they are used, both in industry and at home.
What is a Welding?Welding is a fabrication process that involves melting and joining two pieces of metal or thermoplastics with the application of heat.
During the welding process, a filler material or base material melts in between the two pieces of metal, filling the joint and creating a strong bond. This process is extremely precise and is used in several industries such as automotive, aerospace and home appliances.
Common Types of Welding
- Shielded Metal Arc Welding (SMAW) – The most common type of welding, SMAW uses an electric arc to create a pool of molten metal that fuses together the two pieces of metal.
- Gas Metal Arc Welding (GMAW) – Commonly referred to as “MIG” welding, GMAW uses a consumable wire as the electrode, and an external gas as the shielding gas.
- Gas Tungsten Arc Welding (GTAW) – Commonly referred to as “TIG” welding, GTAW uses a non-consumable tungsten and an inert gas, such as argon, to create the weld.
- Flux-Cored Arc Welding (FCAW) – FCAW is similar to GMAW and uses a consumable wire electrode. The difference from GMAW is the type of shielding gas and wire electrode used.
- Submerged Arc Welding (SAW) – SAW is a very high quality form of welding and is used in various industries.
It is usually used with thick plates and requires a special power supply.
What is a Welding Certificate?In order to be a certified welder, you must show evidence that you are qualified, experienced, and safe while welding.
A welding certificate is proof that you are a proficient welder who has followed the guidelines set by the industry and all the applicable standards. A welding certificate, also known as a welding qualification certificate, typically shows the completed welding process, including type of welds, qualification of the welding, and materials used.
It is issued after a welder passes an evaluation test, ensuring that they are up to the standards of the industry.