What is the use of tungsten electrode?

Tungsten is a rare metallic element used for manufacturing TIG (or GTAW) electrodes. The TIG process relies on tungsten’s hardness and high temperature resistance to carry the welding current to the arc, as it has the highest melting point of any metal (3,410 degrees Celsius).

Likewise, what are pure tungsten electrodes used for?

In AC welding, pure or Zirconiated tungsten electrodes melt to form a hemispherical balled end. For DC welding, Thoriated, Ceriated, or Lanthanated tungsten electrodes are usually used. For the latter, the end is typically ground to a specific included angle, often with a truncated end.

How radioactive is 2% thoriated tungsten?

The Radioactivity Problem. The Thorium used in 2% thoriated tungsten is a radioactive element and therefore can be dangerous to the health of those exposed to it and to the environment. during the grinding of electrode tips there is generation of radioactive dust, with the risk of internal exposure.

Is thoriated tungsten radioactive?

The Radioactivity Problem. The Thorium used in 2% thoriated tungsten is a radioactive element and therefore can be dangerous to the health of those exposed to it and to the environment. during the grinding of electrode tips there is generation of radioactive dust, with the risk of internal exposure.

What is difference between TIG and MIG welding?

The major difference between Mig and Tig welding is that one process uses a continuously feeding wire (MIG) and the other you use long welding rods and slowly feed them into the weld puddle (TIG). The technical names for these are metal inert gas (MIG), and tungsten inert gas (TIG).

Why TIG welding is used?

Helium is also commonly used to weld stainless steel and copper. The argon/helium combination gas is used for a hotter arc in welding aluminum and aluminum alloys. It is also used in automatic welding applications. Even though TIG is a commonly used welding process, there are a number of limitations.

What is MIG wire?

Gas metal arc welding (GMAW), sometimes referred to by its subtypes metal inert gas (MIG) welding or metal active gas (MAG) welding, is a welding process in which an electric arc forms between a consumable wire electrode and the workpiece metal(s), which heats the workpiece metal(s), causing them to melt and join.

What are the different types of welding?

The main Types of welding used in industry and by home engineers are commonly referred to as Mig welding, Arc welding, Gas welding and Tig welding.

  • GMAW or Gas Metal Arc Welding.
  • GTAW or Tungsten Inert Gas.
  • Arc Welding or SMAW.
  • Gas or Oxy Acetylene Welding And Cutting.
  • Welders Protective Gear.
  • Welding Machines.
  • How to Weld.
  • What does MIG and TIG welding stand for?

    MIG – ‘MIG’ stands for ‘Metal Inert Gas’ welding, but you might also see it referred to as ‘GMAW’ (‘Gas Metal Arc Welding’), or ‘MAG’ (‘Metal Active Gas’ welding). TIG – ‘TIG’ stands for ‘Tungsten Inert Gas’ welding, which is the same as ‘GTAW’ (‘Gas Tungsten Arc Welding’).

    What is an arc welder?

    It is a type of welding that uses a welding power supply to create an electric arc between an electrode and the base material to melt the metals at the welding point. They can use either direct (DC) or alternating (AC) current, and consumable or non-consumable electrodes.

    What does flux core mean?

    Flux-cored arc welding (FCAW or FCA) is a semi-automatic or automatic arc welding process. FCAW requires a continuously-fed consumable tubular electrode containing a flux and a constant-voltage or, less commonly, a constant-current welding power supply.

    When was the first MIG welder?

    The principles of Mig Welding History began to be developed around the turn of the 19th century, with Humphry Davy’s discovery of the electric arc in 1800. At first, carbon electrodes were used, but by the late 1800s, metal electrodes had been invented by N.G. Slavianoff and C. L. Coffin.

    What metals can be MIG welded?

    MIG welding is useful because you can use it to weld many different types of metals: carbon steel, stainless steel, aluminum, magnesium, copper, nickel, silicon bronze and other alloys. Here are some advantages to MIG welding: The ability to join a wide range of metals and thicknesses. All-position welding capability.

    What is blue tungsten electrode used for?

    Offers good arc starting characteristics and longer life than 2% Thoriated. It can be used for both AC and DC welding with both inverter and transformer power sources. 2% Lanthanated Tungsten (TL2) – Blue Tip – The most commonly used, non-radioactive tungsten and also a great substitute for 2% Thoriated tungsten.

    What tungsten to use for steel?

    When welding aluminum, use AC current and a ceriated (gray identifying band) or 1.5% lanthanated (gold identifying band) tungsten. When welding steel and stainless steel, use DC-Straight Polarity (DCEN) and a 2% thoriated (red identifying band) tungsten .

    What color tungsten to use for steel?

    THORIATED Tungsten Color Code RED, YELLOW, MAUVE or ORANGE, is best suited for DC Tig welding applications. 2% Thoriated, Red, AWS Class EWTH-2, DC welding applications. The most common type of electrode used today. Applications: carbon & stainless steel, nickel alloys and titanium.

    What color is 2% tungsten?

    Experts Weigh InType of Tungsten (Alloy)Color CodeCeriated CeO2 1.8% to 2.2%GrayThoriated ThO2 1.7% to 2.2%Red, YellowLanthanated La2O3 1.3% to 1.7%Gold, Black, BlueZirconiated ZrO2 0.15% to 0.40%Brown

    What is green tungsten used for?

    Pure tungsten also provides good arc stability for AC sine wave welding, especially on aluminum and magnesium. It is not typically used for DC welding because it does not provide the strong arc starts associated with thoriated or ceriated electrodes.

    What is the purple tungsten?

    About 3/32 in E3 (purple) Tig Tungsten. In comparison to Thoriated (red) and Pure (green) electrodes, the E3 (Purple) electrodes are less harmful to the environment and not radioactive. They offer excellent arc starting and stability characteristics and consistent welding properties.

    What is gold tungsten used for?

    The gold lanthanated tungsten electrodes contain less lanthanum than their blue counterparts and are best used in DC applications. They are best for welds with titanium alloys, copper alloys, nickel alloys, and non-corroding steel.