Tungsten carbide cross-hole countersink cutter is a zero flute cone-shaped tool made of tungsten carbide with a hollow hole goes through the cutting edge from the side of the cone. The cutting edge is comprised of the intersection of the hole and the cone-shaped part. Specially, the cone is not strictly symmetrical.

Tungsten carbide cross hole countersink cutter is also referred to deburring tool. During the machining operation, it could bite into the work piece while the tool rotates providing clearance for its cutting edge. The rotation of the tool could remove the burr from the material due to cosmetic and safety consideration. In addition , the tool could be also applied in softer material to prepare a countersunk hole for a screw.

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Tungsten acid can be used for water treatment chemicals.

Chemicals from water treatment and distribution reach drinking-water by the most direct route. They fall into three broad categories:

•substances resulting from the addition of chemicals used in the treatment process for coagulation and disinfection — these chemicals are intentionally added and can give rise to residues or by-products;

•disinfectants that are deliberately added with the intention of maintaining a residual in distribution, usually to the tap — these chemicals may also give rise to by-products;

•substances that leach from materials used in distribution or plumbing, or that arise from the corrosion products of pipes.

 

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The emission of a single gamma ray is a very small-scale nuclear phenomenon. It is the role of the gamma-camera head to amplify this microscopic radiation into an electric signal that can be detected and measured.

The gamma camera detection head consists of:
- a collimator
- a scintillating crystal
- an array of photomultiplier tubes
- an electronic system for detection and measurement of gamma energies and impacts

The collimator of gamma camera is a thick plate of tungsten riddled with a large number of very thin parallel channels. The gamma rays which can pass through it are those whose direction is perpendicular to the surface of the tungsten plate and the scintillating crystal. The channel axes point towards the body part under examination, and the tungsten stops all gamma photons traveling at an oblique angle. Other collimators can be designed using different techniques: a pinhole collimator is used for thyroid scintigraphy scans, whereas fan-shaped collimators are used for imaging of the brain.

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Tungsten alloy has excellent radiation attenuation properties, with thinner thickness but high effective in blocking harmful X-ray and gamma radiation. Tungsten alloy shielding is the best choice in nuclear medicine. Nuclear medicine tungsten radiation shielding is usually used in the nuclear medical equipment , such as collimator, linear accelerator, multileaf collimator, computed tomography, X-ray energy, absorptiometry, and gamma knife.

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Tungsten acid can be used for electroplating.

Electroplating is a process that uses electric current to reduce dissolved metal cations so that they form a coherent metal coating on an electrode. The term is also used for electrical oxidation of anions onto a solid substrate, as in the formation silver chloride on silver wire to make silver/silver-chloride electrodes. Electroplating is primarily used to change the surface properties of an object (e.g. abrasion and wear resistance, corrosion protection, lubricity, aesthetic qualities, etc.), but may also be used to build up thickness on undersized parts or to form objects by electroforming.

The process used in electroplating is called electrodeposition. It is analogous to a galvanic cell acting in reverse. The part to be plated is the cathode of the circuit. In one technique, the anode is made of the metal to be plated on the part. Both components are immersed in a solution called an electrolyte containing one or more dissolved metal salts as well as other ions that permit the flow of electricity. A power supply supplies a direct current to the anode, oxidizing the metal atoms that it comprises and allowing them to dissolve in the solution. At the cathode, the dissolved metal ions in the electrolyte solution are reduced at the interface between the solution and the cathode, such that they "plate out" onto the cathode. The rate at which the anode is dissolved is equal to the rate at which the cathode is plated, vis-a-vis the current through the circuit. In this manner, the ions in the electrolyte bath are continuously replenished by the anode.

Other electroplating processes may use a non-consumable anode such as lead or carbon. In these techniques, ions of the metal to be plated must be periodically replenished in the bath as they are drawn out of the solution. The most common form of electroplating is used for creating coins such as pennies, which are small zinc plates covered in a layer of copper.


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Tungsten acid can be used for making tungstate.

In chemistry a tungstate is a compound that contains an oxoanion of tungsten or is a mixed oxide containing tungsten. The simplest tungstate ion is WO₄²⁻, "orthotungstate". Many other tungstates belong to a large group of polyatomic ions that are termed polyoxometalates, ("POMs"), and specifically termed isopolyoxometalates as they contain, along with oxygen and maybe hydrogen, only one other element. Almost all useful tungsten ores are tungstates.


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Tungsten acid can be used for refractory material.

A refractory material is one that retains its strength at high temperatures. ASTM C71 defines refractories as "non-metallic materials having those chemical and physical properties that make them applicable for structures, or as components of systems, that are exposed to environments above 1,000 °F (811 K; 538 °C)".

Refractory materials are used in linings for furnaces, kilns, incinerators and reactors. They are also used to make crucibles.


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Tungsten acid can be used for catalyst.

Catalysis is the increase in the rate of a chemical reaction due to the participation of an additional substance called a catalyst. With a catalyst, reactions occur faster and with less energy. Because catalysts are not consumed, they are recycled. Often only tiny amounts are required.

Catalysts can be heterogeneous or homogeneous, depending on whether a catalyst exists in the same phase as the substrate. Biocatalysts (enzymes) are often seen as a separate group.

Estimates are that 90% of all commercially produced chemical products involve catalysts at some stage in the process of their manufacture. In 2005, catalytic processes generated about $900 billion in products worldwide.

 

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Tungsten acid can be used for mordant.

A mordant is a substance used to set dyes on fabrics or tissue sections by forming a coordination complex with the dye which then attaches to the fabric or tissue. It may be used for dyeing fabrics, or for intensifying stains in cell or tissue preparations. The term mordant comes from the present participle of French mordre, "to bite". In the past, it was thought that a mordant helped the dye bite onto the fiber so that it would hold fast during washing. A mordant is often a polyvalent metal ion. The resulting coordination complex of dye and ion is colloidal and can be either acidic or alkaline.

 

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Physical vapor deposition (PVD) coatings are normally about 2-4 microns thick with hardness and chemical stable properties.



Generally the processes to help the tungsten carbide inserts to put on PVD coatings comprise, firstly the tungsten carbide inserts are required to be mounted on racks separately from each other. Besides setting the whole racks revolving within the vacuum furnace, each rack with the inserts is designed to expose every surface of the inserts is exposed to the deposition process. After that, a strong negative charge is applied to the inserts. Inside the vacuum furnace, there is a piece of titanium, or titanium and aluminum is installed on the wall or floor. The metal is vaporized by either an electric arc or an electron beam, liberating the positively charged metal ions. These ions are attracted to the negatively charged inserts. Nitrogen and methane are added as appropriate, to achieve the different types of coatings.


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