The steel then flows onto and around the tungsten carbide part. The steel alloys with the cobalt on the surface. It forms a very strong bond. There are several problems. Braze alloy does more than join parts. It also acts as a shock absorber to keep the part from breaking. Brazing is also a better technology for the production of custom saws in limited quantities. Welding tungsten carbide is used two ways. It is used in the production of inexpensive tungsten carbide tipped, circular saws for the handyman market.
It is also used to make tungsten carbide tipped band saws. Sitemap Website by oBundle. But which tungsten electrode is the right one for my welding process? The selection of the right tungsten electrode or its doping depends largely on the welding task: whether you want to weld direct current or alternating current, the choice of electrodes is limited, because not every type is also suitable for alternating current, which for example is used for aluminum welding.
Depending on the type of current, the welding task and the material to be welded, pure tungsten electrodes are used or those with oxidic additives, usually consisting of rare earths. These additives are zirconium oxide ZrO 2 , lanthanum oxide La 2 O 3 , cerium oxide CeO 2 or thorium oxide ThO 2 — and they all have different properties.
The pure tungsten electrode WP green enables a very steady arc. Oxide-containing electrodes, on the other hand, are easier to ignite, have a high current carrying capacity and a longer service life. So it is obvious that the choice of the right TIG welding electrode for a welding task largely depends on what you focus on in TIG welding.
The tungsten electrode table shown below gives you an overview of the most common types and their suitability and properties. Do you mainly weld high-alloy steels or aluminum? Is the service life of the electrode more important to you or its ignitability? With this table you can make your pre-selection much easier. It has excellent ignition properties and is therefore also often used for automated processes.
The electrode temperature remains consistently low, which in turn increases the current-carrying capacity and the service life compared to thoriated electrodes — which are only allowed to be used in exceptional cases because of their extremely harmful effects.
Colour coding with a mixture of rare earth oxides is:. It is mainly used for welding unalloyed and high-alloy steels, aluminum, titanium, copper and magnesium alloys. The golden tungsten electrode is also used in micro-plasma welding.
Colour codings with lanthanum oxide are:. This type of tungsten electrode is mainly used in the medium and lower current range for welding unalloyed and high-alloy steels as well as aluminum, copper, nickel, titanium and magnesium alloys.
Colour coding with cerium oxide is:. Tungsten also has high resistance and very high corrosion resistance. Colour coding with pure tungsten is:. For the purposes of responsible minerals reporting , a metal is generally considered to be present if testing the final product would reveal its presence at non-trace levels. Do labels need to be translated into the languages of EU member states where products are marketed?
Answer — James Calder: MedTech Europe, the European trade association for the medical technology industry, has published a guidance document on symbol usage for medical device labels. Using symbols rather than multiple translations on medical device labels should make labels more easily understood, and may also help save space on labeling. This guidance also provides context on which information should be included as a symbol on the label.
Question: My company produces percent polymer products. Answer — Jared Connors: Yes, it is possible, particularly in the case of tin.
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