Product Series

Tungsten Electrodes for TIG

Product Introduction


Tungsten electrodes are used in TIG welding. This is a tungsten alloy strip made by doping 0.3%-5% of rare earth metals such as cerium, thorium, lanthanum, zirconium, and yttrium into the tungsten structure by means of powder metallurgy, which is then processed at high pressure. The diameter ranges from 0.25 to 6.4mm, with standard length ranging from 75 to 600. The most common sizes are 1.0, 1.6, 2.4 and 3.2mm diameters, and the shape of the electrode tip is an important factor for TIG. When using DCSP, the electrode tip should be sharpened, with the specific tip angle varying with the application range, electrode diameter and welding current, and narrow joints requiring a smaller tip angle. When very thin materials are welded, a low current, needle-like minimum electrode is used to stabilize the arc, while a proper ground electrode ensures easy arc ignition, high arc stability and proper bead width. When welding with an AC power source, there is no need to grind the electrode tip as it will form a hemispherical shape when the proper welding current is applied. If the welding current is increased, the electrode tip will become bulbous and may melt, contaminating the molten gold.

With the development and expanding application of tungsten electrode inert gas shielded welding, research into tungsten electrodes is becoming ever more advanced. Thoriated tungsten electrodes are used in plasma arc welding, cutting and non-melting electrode argon arc welding. However, because the radioactive effects of thorium (its radiation dose reaches 3.60x10 Curie/kg) damages human health and pollutes the environment, the thoriated tungsten electrode has now been replaced by a cerium tungsten electrode with a cerium oxide content of 2-4%. In direct current argon arc welding, the cerium tungsten electrode is easy to start up, there are low losses due to electrode burning, and the welding current density can be higher than that of thoriated tungsten; in AC argon arc welding, the burning loss from the cerium tungsten electrode is larger than that of thoriated tungsten electrode. The allowable range of welding currents for cerium tungsten electrodes is less than that for thoriated tungsten electrodes.

Thoriated tungsten electrodes are easy to handle and work well even at overloaded currents. There are still many people who use this material, and it is seen as a key part of high quality welding. Even so, people are gradually turning their attention to other types of tungsten electrodes, such as cerium tungsten and lanthanum tungsten. Because the thorium oxide in the tungsten thorium electrodes produces trace amounts of radiation, some welders are reluctant to approach them.

Tungsten electrodes are mainly classified as follows:

 

1. Cerium tungsten electrode

 

Grade

Color

Product

Advantages

Purpose

WC20

Grey

Non-radiating
Low melting rate
Long service life
Excellent arc start

Low-current DC welding

 

2.Lanthanum tungsten electrode

 

Grade

Color

Advantages

Purpose

WL10

Black

Golden

Sky blue

Better mechanical cutting performance

Better creep resistance
High recrystallization
temperature Excellent ductility

AC welding tasks

WL15
WL20

 

3.Thoriated tungsten electrode

 

Grade

Color

Product

Advantages

Purpose

 WT10 

 

Yellow


Red

Purple
 

 

 

Lower electronic functionality
Higher recrystallization
Better conductivity
Excellent mechanical cutting performance

Widely used in DC welding

WT20 

WT30

WT40

Orange  

 

4.Zirconium tungsten electrode

 

Grade

Color

Product

Advantages

Purpose

 

 

WZ3

 

Brown


White

 

Zirconium tungsten electrodes offer an

excellent welding performance in an AC environment.

Especially in the case of high load current, the superior

performance of zirconium tungsten electrodes is unmatched by other types.

 

 

AC welding tasks

 

WZ8

 

5.Yttrium tungsten electrode

 

Grade

Color

Product

Advantages

Purpose

WY

Blue

During welding, the arc beam remains narrow

and compressed, and its penetration depth is large at mediumand high currents.

 

Mainly used in the military and aerospace industries

Product Application


Argon arc welding is also known as argon gas shielded welding. Passing argon arc protective gas around the arc welding isolates the air from the welding area and prevents the oxidation of the welding area. Argon arc welding technology uses argon gas to protect metal welding materials based on the principle of ordinary arc welding, and uses high current to melt the welding materials on the substrate into a liquid state to form a molten pool; the metal can then be welded into a metallurgical combination. Because the argon gas is continuously supplied during high-temperature fusion welding, the welding material cannot com into in contact with the oxygen in the air, thereby preventing the oxidation of the welding material.This makes it suitable for welding non-ferrous metals such as copper, aluminum, and alloy steel.

● Thoriated tungsten electrodes are usually used for the DC welding of carbon steel, stainless steel, nickel alloy and titanium metal.

● Lanthanum tungsten electrodes are primarily used for DC welding, but also perform well in AC welding.

● Pure tungsten electrodes are suitable for welding magnesium, aluminum and their alloys under AC conditions.

● Yttrium-tungsten electrodes are currently mainly used in military and aerospace applications.

● Zirconium-tungsten electrodes are suitable for the AC welding of magnesium-aluminum and its alloys.

Product Specifications


Electrode diameter specification can be selected according to the welding current

Diameter 0.5-50mm, length 150mm/175mm/178mm as required by customers

Fabrication Process


Company Advantage


ATTL is a major enterprise in China's tungsten electrode industry, and participated in the drafting of national standard GB/T 31908-2015 Tungsten Electrodes for Arc Welding and Plasma Welding and Cutting.

ATTL now has an annual output of 900 tons of thoriated tungsten, cerium tungsten, lanthanum tungsten, yttrium tungsten, zirconium tungsten, pure tungsten and composite tungsten electrodes, providing users with high-quality tungsten electrodes of all varieties, grades and specifications.

ATTL has been committed to the development and production of tungsten electrodes for argon arc welding since 1993, and has accumulated a vast amount of experience in production, technology and management. Its production process strictly complies with the IS09001:2015 international quality system, thus ensuring the outstanding quality of ATTL tungsten electrodes.

Contact Information

Liu Shiming


+86-22-59213388


liushiming@attl.cn


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