They tend to be commonly used because they are inexpensive. However, they also burn up much faster than the other alloy electrodes, so prepare to stock up if you go this route.
Why use green, pure tungsten electrodes? They work well on AC sine wave welding and form a solid balled tip that results in a stable arc.
Welders can grind the tip of these electrodes to a sharp point and enjoy and stable arc that last a long time. The final weld puddle is cleaner since the electrode leaves fewer deposits, and thorium allows for easier arc starts and higher current-carrying capacity. Welders can work on projects that include thin aluminum, titanium, carbon steel, stainless steel, and nickel. Since thorium is radioactive, welders remain cautious about using these electrodes. Since it can weld carbon steel, stainless steel, nickel alloys, and titanium, some welders have found that it works well as a replacement for thoriated electrodes.
Ceriated is not recommended for welding at higher amps since the heat can change the composition of the electrode. Welders prefer to work with Ceriated electrodes at lower temperatures for small, precise parts, pipe fabricating, and welding thin metal. In this article, we will mention a few popular electrode choices and their uses. Pure tungsten electrodes comprise of The ball tip shape also gives the arc excellent stability. They work particularly well with magnesium and aluminum alloys and are ideal for application with low to medium amperage requirements.
Pure tungsten only works well with an AC power supply. Rare Earth is one of the elements that are added to pure tungsten. All Rare Earth electrodes contain an unspecified mix of natural additives; however, manufacturers have to specify the composition percentage of each material present on the packaging.
The combination you choose will depend upon the desired results and the metals being welded. The multiple available combinations allow you to ensure that the arc is stable and that you can achieve optimal weld penetration. Rare Earth electrodes also allow you to use smaller diameter electrodes, relay higher current levels and produce less tungsten spitting than other types of electrodes.
Thoriated tungsten electrodes contain They have low radioactivity and high current carrying ability, making them highly suitable for arc welding procedures. They are long-lasting and easy to use, which is an added advantage.
Thorium oxide electrodes are ideal for use with a DC power supply. They have high melting points and can take significant amounts of heat with minimal melting. They are suitable for use on thinner steel plates, as they have average corrosion rates and moderate amperage requirements. However, thorium oxide emits alpha particles that are hazardous for human beings.
Replacing thorium oxide with rare earth removes the health risks attached to the particles while keeping many of the benefits. Thorium electrodes are ideal for a few particular AC welding jobs, such as thin-gauge aluminum and material less than 0.
Lanthanated electrodes are only ideal for use with Direct Current power sources. Striking an arc is relatively more comfortable with Lanthanum electrodes, and these electrodes have amazing arc stability, excellent re-ignition properties, and low burn-off rates.
They are useful when it comes to welding the following materials:. Ceriated electrodes are made of If you need to weld small delicate parts or are working with thin metal sheets, pipe fabrication, or orbital tube manufacturing, then Ceriated electrodes are the right electrodes for you.
Some compounds metals that they can be used with are:. They are long-lasting electrodes with excellent ignition and re-ignition capabilities. They produce exceptionally stable arcs and can be used at low amperage ranges as well. With low erosion rates, ceriated tungsten proves better than pure tungsten as it offers better current carrying properties. If you need to increase Tungsten stick out, to be able to see easily for example, but this increases the risk of poor gas shield integrity, it would be necessary to increase the gas flow to compensate.
The correct choice of Tungsten Tig Electrode is important and will affect the possible results of Tig Welding, as will the way a Tungsten is sharpened if being used for DC applications. Please let me know what you thought of this article by leaving a comment.
Click Gold Tungsten Tig Electrodes to view our range. Moreinfo on Tig generally can also be found in our Knowledge Zone. Hi Garry Thanks for the comment, glad you found the article useful. Hard to be specific without seeing your welds, or set up. Possible causes might be not enough power or moving too fast, check your penetration, if penetration is OK, this thought can be discounted.
If the gas flow is too high the gas can deflect of the surface of the job, drawing air underneath it, causing Oxidisation. The tungsten will give off some of this thorium when being sharpened. Hi Paul Thanks for your comment. Clearly if this much ingestion or breathing were to happen radioactivity is likely to be the least of the persons problem.
0コメント