
Why does Stainless Steel rust?
Tungsten inert gas welding, better known as TIG welding, is a shielding gas welding process, which belongs to the group of fusion welding processes.
This is an autogenous process in which heat is generated by the arc strike between the work piece and the infusible electrode, meaning that the electrode is not consumed.
The electrodes are made of tungsten or tungsten alloy. These materials have very high melting temperatures and excellent thermionic emission properties that facilitate arc operation.
TIG welding melts the edges of the work piece. Toothpick filler material is used to create the joint.
During the welding process, the welding torch releases inert gas. The gas flow protects the adjacent areas of the electrodes, the weld pool, the arc, the filler material and the parts from atmospheric contamination.
The gas used is usually argon, which is a mixture of argon and oxygen, and less frequently helium. It is used to obtain the highest welding quality.
TIG welding is ideal, for example, for stainless steel, aluminum and nickel alloys, as well as for thin sheets of aluminum and stainless steel. The applications are in the construction of pipes and tanks, construction of doors or in aviation and astronautics.
Normally the gas that is usually used is argon, a mixture of argon and oxygen and less frequently helium.
In TIG welding, the required current is provided by a tungsten electrode that is heat resistant and does not melt. From this electrode an electric arc begins that heats and liquefies the material.
Around the electrode is a tube exposed to shielding gas. This protects the hot material from chemical reactions with the surrounding air.
As previously mentioned, noble gases such as argon, helium or a mixture of both are used for this type of welding. Inert and non-reactive gases prevent chemical reactions in the molten bath of hot liquids and substances. In this way, high-quality weld seams are obtained.
Since the tungsten electrode does not melt, the welding material during TIG welding is fed manually or by machine, using an external wire feeder. previously mentioned, noble gases such as argon, helium or a mixture of both are used for this type of welding. Inert and non-reactive gases prevent chemical reactions in the molten bath of hot liquids and substances. In this way, high-quality weld seams are obtained.
Tungsten electrode is the heart of TIG welding, the highest melting point for all pure metals in the periodic table. It is presented by the Tugsene, counting on 3380 ° C, it is for this reason that the electrode is not combined, while the voltage arc is emitted to heat and liquefy the material.
The electrodes are made with a teller process. To improve their properties, they can be mixed with oxide fillers. Depending on the alloy, the electrodes are distinguished by different colors:
TIG welding is used to weld austenitic stainless steels. The techniques are similar to those used to weld carbon steels and low alloy steels, with some differences presented below:
As we are seeing, this type of TIG welding has very specific characteristics so that its use is malleable, then we are going to see some advantages and disadvantages of this type of product.
As we are seeing, this type of TIG welding has very specific characteristics so that its use is malleable, then we are going to see some advantages and disadvantages of this type of product.
Do you know how to weld aluminum? Tand invite you to visit our blog, we explain how to weld on this material using TIG welding
At Perez Precision Works, we offer high quality equipment, with excellent professional service when you contact us for your TIG welding machine supplies.
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