Common welding technologies in industrial production (Part 2)

TIG Welding (Tungsten Inert Gas Welding)

TIG welding is a welding technology that uses a tungsten (Tungsten) electrode to create an electric arc with the metal. TIG welding uses non-corrosive electrodes, so tungsten cannot be melted during welding. TIG welding does not use flux or slag forms to protect the weld, instead, it uses inert gas to protect the weld from external influences, the most commonly used gas is argon.

TIG welding can work with both AC and DC power. One of the biggest strengths of TIG welding technology is that it is used for welding metals without iron elements such as welding aluminum, copper, magnesium, nickel, titanium, etc.

Common applications of TIG welding:

– Used in aviation and aerospace industry.

– Car industry

• Benefits of TIG welding

– Clean, beautiful weld.

– High degree of weld control.

– Can be used with auxiliary materials or not depending on the user.

– Can be soldered manually or by automated methods such as robots …

– The weld is firm and hard to be broken.

• Inadequacies of TIG welding

– Takes a lot of time and effort.

– Request a skilled welder.

– Can not be used with materials that are too thick.

Flux cored Arc Welding-FCAW (Flux cored Arc Welding-FCAW)

There are 2 types of arc welding wire core welding that are using protective gas (gas-shield) and self-shielding (shelf-shield) during welding.

For self-shielding, the welding process produces slag and gas in the electrode when enough heat is reached. This method does not require external protection as other methods.

For protective gas use, during welding, gas will be injected and the drug in the welding wire will only produce slag, not gas as above. This method gives the welder more ability to control the weld. This method also uses a corrosive electrode during welding. FCAW cannot be used on materials other than iron, such as aluminum and titanium.

Common applications of medicinal wire arc welding.

– Shipbuilding industry.

– Manufacturing steel pipes.

– Railway industry.

– Maintenance and repair.

• Benefits of using solder wire.

– The weld has good permeability.

– Suitable for thick materials.

– Flexibility in moving groins.

– Does not require high skills.

– The highest metal deposition in the weld.

• Inadequacies when using welding wire.

– Welding slag causes dangerous splashing around.

– The medicine cord used has a high price.

– The weld is not aesthetically pleasing.

Gas welding – Oxyacetylene

Gas welding uses the temperature from the burning of a gas to melt the welding material, which can be used without the need for additional materials.

The welding flame is controlled by the torch, oxygen and gas are connected to the torch through the pipes. The user controls the heat of the flame by controlling the pressure of gas supplied to the mine. This welding technology produces heat of about 3200 ° C if oxygen and acetylene are used, some other gases are also used such as Hydro, Butane, Propane, etc.

Common applications of oxy-gas welding:

– Welding of sheet metal.

– Used in manufacturing automobile, aircraft.

– Welding both ferrous and non-ferrous metals.

– Welding of thin materials.

• Benefits of using oxy-gas welding.

– Easy to control welding fire.

– It costs less.

– Can be used to cut materials

• Harm when using oxy-fuel welding.

– Lower temperature than electric arc welding.

– More difficult to create weld protection layer.

– Not suitable for metals with high chemical reactions.

Overall, welding is a major area of ​​industrial manufacturing. The development of technology creates more sophisticated and accurate new technologies that bring many economic benefits to users.

Productivity and Quality Office