Welding is a fabrication process in which we combine or fuse two different hard metals (parent materials and filler or consumable) by heating or at extreme pressure which does not allow anyone of them get diffuse or melt completely. Different types of welding processes are used to save melted metals from oxidizing.
Moreover, welding is also done to make plastic soft and pliable like thermoplastics (acrylic, polyester, polypropylene, polystyrene, nylon and Teflon) at high temperature and even on wood. Selected filler must be reliable for parent material and for the success of weldment.
Main Types of Welding Process:
Here is a list of main types of Welding:
- GAS METAL ARC WELDING (MIG)
- GAS TUNGSTEN ARC WELDING (TIG)
- SHIELDED ARC METAL WELDING (STICK)
- FLUX-CORED ARC WELDING (FLUX-CORED)
MIG – Gas Metal Arc Welding type:
MIG (Metal Inert Gas) welding is done by (carbon dioxide, oxygen, argon or helium gas) at controlled temperature and pressure for stainless steel, copper, nickel, carbon steel, aluminum and other such metals. Thin wire acts as an electrode and starts melting while welding at selected point.
In addition to it, shielding gas (argon) provides complete protection from contaminants and other dust particles. Most convenient and reliable process for beginners and who believe in efficient welding. Cost of shielding gas with inability to weld highly hard metals makes it expensive and unique.
The construction and automotive industries are continuously being using it, because of its unique and unprecedented properties. So, It’s a well known type of welding.
Also Check: Welding Symbols
TIG- Gas Tungsten Arc a Type of Welding:
TIG welding also uses electric wire like MIG welding. Tungsten inert gas is used to join or diffuse thing and non-ferrous metals like nickel, tin, titanium and zinc, as well as copper alloys like brass and bronze. Argon and helium works as an external gas.
TIG is highly being used for bicycles and aircraft manufacturing because of electrode (tungsten). Tungsten is toughest material which does not dissolve or burn off easily and can bear temperature changes and humidity.
Farmers use it for fenders and other hard equipment. Area of parent material and consumable is very small so expert can use it well. Spaceship companies are highly demanding gas tungsten welding because of its hardness and stability.
Shielded Arc Metal Welding (Stick):
We produce wide range of shielded arc metal welding sticks for reliable and long-lasting welding of different materials. Shielded arc metal welding (SAMW) is also known as manual metal arc welding or flux shielded arc welding. It is manual arc welding process in which consumable electrodes are used covered with a flux to lay the weld. Shielded arc metal welding is one of the most known and easy way of welding in all over the world. It is better than other welding ways in maintenance repair industry. Stick Welding functions when an electric current in the form of either alternating current or direct current from a welding power supply, is used to form an electric arc between the electrode and metals to be joined.
The work piece and the electrode melt forming a pool of molten metal which cools to form a joint. As the weld is laid, the flux coating of the electrode distinguished, providing off vapors that serve as shielding gas giving a layer of slag, both of which protect the weld area from atmospheric contamination. However, shielded arc metal welding is the most popular welding process of the world. The basic use of this process is to weld Iron and Steel, but Aluminum, Nickel and copper alloys are also being weld.
FLUX – Cored Arc Welding Type (Flux-Cored):
Flux-cored arc welding (FCAW) is a semi-automatic or automatic arc welding process. It requires a continuously-fed consumable tabular electrode having a flux and a constant-voltage or a constantly current providing power supply. In this process we need a source of which continuously provides power, a welding gun, welding cables, wire feeders and shielding gas equipment. FCAW utilizes the heat created by an electric arc to fuse the base metal in the weld joint area. Hollow or tabular electrode filled with a flux compound which is also called flux-cored wire is used to protect the weld pool by forming a gas. There are two steps in this type of welding:
- Firstly, welding is done by using the most common shielding gases including carbon dioxide 25% and blends of argon 75%.
- Second step include protection and polishing. The use of gases in first step produces slags. The filler wire core is used to look magnificent, polish and for filling that slags.
Also Check: Welding Tables
In industries like construction, heavy equipment repair, structural steel erections, ship building, Et cetera are using Flux-Cored arc welding. The main benefit of FCAW is that it works on all kinds of material even if contaminated. It can dissolve mill scale and rust as well. This welding process is also popular due to its flexibility and versatility. The metals like cast iron, stainless steel, carbon steel, high nickel alloys, and low-alloy steel can be easily welded the FCAW process. That is why, this process of welding is most commonly and surely used in all over the world.