TYPES-OF-WELDING-METHODS
24
March
Tuesday, March 24th, 2020 , Antonios Metal, No Comments

TYPES OF WELDING METHODS

Stick-Arc-welding-(SMAW)

Stick/Arc welding (SMAW)

Stick Arc welding or also commonly known as Shielded Metal Arc Welding(SMAW) or Manual Metal Arc Welding(MMA or MMAW) is a welding process that is done by using a consumable electrode that is covered with a flux that helps to lay the weld. This method is generally done to protect the arc and the hot metal from any type of chemical reactions that could take place when exposed to the atmosphere. This type of welding method is a simpler method and is fairly easier to learn when compared to other types of welding methods. Although it is said that it is simpler than the other methods of welding there are a lot of things that you should be aware of if you are looking to learn about Stick Arc Welding. Given below are a few things that can give you some hints about the things you should know about Stick Arc Welding:

Why choose stick arc welding?

  • The first reason is that it is an inexpensive method having simple and portable equipment.
  • If you are planning to do any type of outdoor welding then this type of welding can be the best option.
  • The reason why this welding method is easy to learn is because it has a wide range of welding positions, electrodes and metals applicable in the process. So it can be the best option for beginners.

Things to remember before starting the welding process

  • Safety is the first thing you should always consider as you will be working with very hot materials which could be lethal for your skin or in the worst case your life. So before you start the process you should try to get your hands on welding gloves, safety glasses, helmet, protective clothing which comprises jackets, boots, aprons etc.
  • You should know how to use the equipment that is available for the welding process like the correct amperage or choosing the right type of electrode to use. Since it is a simpler way of welding, learning how to use the equipment should not be a complicated process but it is always recommended to consult an experienced person or go through the manuals before you actually start the process.

Metal-Inert-Gas-(MIG)-welding-or-GMAW

Metal Inert Gas welding(MIG)

Metal Inert Gas welding(MIG) or also sometimes called Gas Metal Arc Welding(GMAW) is a welding process where an electric arc is formed between a consumable MIG electrode wire and the workpiece metals that heats the workpiece metals resulting in the electric wire and the workpiece metal to melt and join. Given below are a few important things you should know about Metal Inert Gas welding:

What is the inert gas used in the welding?

An inert gas or mixture of gases used in MIG are argon and helium which are used as the shielding gas. They are particularly used for the welding purpose of aluminium and other non-ferrous metals like carbon steel, stainless steel, aluminum, magnesium, copper, nickel, silicon bronze and other alloys.

Why do we use inert gas for welding?

Inert gases are used for the purpose of MIG welding because the term inert means that it will not react with anything in the welding environment unlike oxygen which can cause the metal to rust. The inert gases used in the welding process are the ones that protect the weld from the outer atmosphere.

What are the equipment used during MIG welding?

The equipment you will need to perform a MIG welding are a welding gun, shielding gas supply, a wire-drive system that will pull the wire electrode from a spool and will push it through the welding gun and also cold water that will be required for the welding gun.

Safety measure to consider.

Since you will be working with very hot substances during a welding there are few things you should have with you before you start the work. First thing you should always make sure that you are not welding near any flammable materials to avoid fire. Other things to have are full sleeved non flammable protective clothing, face shield, ear plugs to avoid the sparks to get into your ear canal, non flammable shoes and proper welding gloves.

Tungsten-Inert-Gas-(TIG)-welding-or-GTAW

Tungsten Inert Gas (TIG) welding or GTAW

Tungsten Inert Gas (TIG) or also called Gas Tungsten Arc Welding (GTAW) is an arc welding process where a non-consumable tungsten electrode is used to produce a weld. An inert gas is used in this type of welding process which is Argon that protects and cools the tungsten as well as the weld puddle. Given below are a few things you should know about TIG:

What are the items required for TIG?

Some of the basic things needed to perform a TIG welding are:

  • Personal safety equipments(Face Mask, Non-flammable clothing, welding gloves etc)
  • Welding machine(with instructions to use it properly)
  • A tungsten electrode.
  • Electrode holder or also called a torch
  • Gas supply for shielding gas(argon, helium or a mixture)
  • Filler metal rod

What is the inert gas used during TIG?

Inert gas in simple terms are a mixture of gases that do not react to the outer environment and undergo chemical reactions. The inert gas used during a TIG welding process is either argon or helium and sometimes a mixture of both.

How to perform a TIG welding?

Performing a TIG welding is not anyone’s cup of tea. You need a lot of practice and experience to be able to properly perform the welding process. Some of the steps you can follow while learning how to TIG weld are:

  • Wear all types of safety gears and clothing’s.
  • Learn how to choose the right electrode but as a beginner your TIG will most probably have the correct electrode in it already.
  • Proceed into grinding the electrode.
  • Attach the electrode to the collet.
  • Look into the instructions manual and choose a setting.
  • Turn the gas on.
  • Prepare the metal you will be welding and the table to perform the welding.
  • Give it one last check and then proceed with the welding process cautiously.

Flux-Cored-Arc-Welding

Flux-Cored Arc Welding

Flux-Cored Arc Welding(FCAW) is a welding method which is an automatic or semi-automatic process. This welding method is mostly used in ship building and also for maintenance and fabrications. The FCAW method is used on things that have rust or is contaminated in some way. Give below are some things you need to know about Flux-Cored Arc Welding:

What is Flux in FCAW?

Flux in welding is a mixture of silicate and carbonate that helps to protect the weld from any foreign atmospheric gases. While performing the welding the weld melts and outgasses when the heat of the weld reaches the flux resulting in the atmospheric gas to be pushed back to avoid oxidation by the gas produced from the flux.

What is FCAW used for?

FCAW welding method is mostly used for industrial purposes or in construction sites because it has welding speed and is portable. Since FCAW welding offers higher penetration, it is very efficient while working with thicker welding joints that can mostly be found in ship building, fabrications or other types of manufacturing processes.

How to do FCAW welding?

FCAW welding is actually a rather simple welding process to learn. You do not have to be a professional welder to be able to do FCAW welding. Once you learn how to use the welding equipment properly then learning the technique to do the welding is easy to learn. An important thing to consider while performing FCAW welding is that you need to do it in a well ventilated room as the welding process produces considerably a lot of smoke. Besides the mentioned tips you need to make sure that you take safety precautions by wearing non flammable clothing, proper face mask, welding gloves and non flammable shoes like any other welding processes as you would be working with highly flammable materials.

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