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Lightbringer: tungsten carbide

2019-08-26
Tungsten carbide is a chemical compound composed of tungsten and carbon. The hardness of tungsten carbide is extremely high, the mohs hardness is 8.5-9, and the melting point reaches 2870℃, the resistance is also low, commonly used as cutting tool material, manufacturing high hardness armor or armor piercing bullet core, as well as some sports requiring high hardness and ballpoint beads of ballpoint pens..
 
Application
1.     Cutting tools for machining
Sintered tungsten carbide - Cobalt cutting tools are very wear resistant and can withstand higher temperatures than standard high speed steel (HSS) tools. Carbide cutting surfaces are commonly used for machining through materials such as carbon steel or stainless steel, as well as for the rapid wear of steel tools, such as high quality and high precision production. Because carbide tools retain sharper cutting edges better than steel tools, they generally produce a better finish on the part, and their temperature resistance allows faster processing of the material, often referred to as cemented carbide. Solid carbide, cemented carbide or tungsten carbide. It is a metal matrix composite in which tungsten carbide particles are aggregates and metallic cobalt acts as a matrix.

2.     Ammunition
A monolithic form of tungsten carbide, or more commonly a tungsten carbide-cobalt composite in which fine ceramic tungsten carbide particles are embedded in a metallic cobalt binder to form a metal matrix composite or MMC, is commonly used in armor-piercing ammunition, especially in depleted uranium or Politically unacceptable. In the Second World War, the German Air Force tank hunter team used two C bombs for the first time. Due to the limited tungsten reserves in Germany, WC materials are used to make machine tools and a small number of projectiles. It has a high hardness and a high density and is an effective penetrator.
Tungsten carbide ammunition is now usually a shell type or a broken light armor penetrator, in which the plastic cartridge is discarded at the barrel orifice and is one of the main types of small arms ammunition. Regardless of the jacket material, a jacket that is not discarded will not be considered a bullet casing but a bullet. However, these two designs are common in designated light armor-piercing small arms ammunition.
3.     Mining and foundation drilling
Tungsten Carbide In the top hammer rock drill bit, mining uses a wide range of downhole hammers, roller knives, longwall plough chisels, longwall shearers, patio drill reamer, and tunnel boring machines. It is commonly used as a button insert that is mounted in a surrounding matrix of steel to form the material of the drill bit. As the tungsten carbide button wears, the softer steel matrix containing it wears out, exposing more button inserts. The basic borehole also uses teeth to repair hard rock by using teeth made of tungsten carbide. The stud is mounted and applied to the tip of the tooth.

4.     Nuclear
Tungsten carbide is also an effective neutron reflector and is therefore used in early studies of nuclear chain reactions, especially for weapons. On August 21, 1945, a serious accident occurred at the Alamos National Laboratory in Los Angeles, when Harry Daghlian accidentally threw tungsten carbide bricks onto a ball called the devil's core, neutron supercriticality leading to subcritical mass and reflection.
5.     Sports use
Trekking poles, balanced by many hikers and reducing pressure on the joints of the legs, generally using carbide inserts to obtain traction when placed on hard surfaces (such as rock); carbide tips last longer than other types of tips .
Although the tip of the pole is usually not made of carbide, it does not need to be particularly hard even though it passes through the ice layer and is therefore usually a sliding tip. Roller skiing mimics cross-country skiing, and many skiers use it for training in warm weather.

A ground carbide tip (called a stud) can be inserted into the drive track of a snowmobile. These rivets enhance the traction on the ice. The longer V-shaped section fits the grooved rod with the pole under each snowmobile ski. The relatively sharp carbide edge enhances the steering on the harder ice. Carbide tips and segments reduce wear when snowmobiles must pass through roads and other abrasive surfaces.

Cars, motorcycles and bicycle tires with tungsten carbide studs provide better traction on ice. Tungsten carbide inserts protruding from the interior of zinc or aluminum seats are often referred to as "souls" in the tire manufacturing industry. These are generally superior to steel studs because of their excellent wear resistance.

6.     Jewelry
Tungsten carbide, usually in the form of cemented carbide (carbide particles brazed together by metal), has become a popular material in the wedding jewellery industry due to its extremely high hardness and high scratch resistance. Even with high impact resistance, this extremely high hardness means that it can occasionally be destroyed in some cases. Some people think this is useful because the impact destroys the tungsten ring and removes it quickly, and the precious metal bends and needs to be cut. Tungsten carbide is about 10 times harder than 18k gold. In addition to its design and high degree of polishing, its appeal to consumers lies in its technicality. If such a ring must be removed quickly (for example, a medical emergency accompanied by swelling due to a hand injury), special tools such as locking pliers may be required.