What is the chemical composition of tungsten carbide?
WCTungsten carbide / Formula
Tungsten carbide (WC) is an inorganic non-natural compound composed of tungsten (W) and carbon (C). Mono-tungsten carbide (WC), which is stable at room temperature, is of major technical relevance. WC exhibits a hexagonal structure made of a grid of tungsten and carbon.
What are the properties of tungsten carbide?
Characteristics of tungsten carbide
- 1High hardness. The Mohs’ hardness of tungsten carbide is “9.” It boasts a level of hardness second to diamond.
- 2High strength at high temperature.
- 3High resistance to corrosion.
Is cemented carbide and tungsten carbide same?
Cemented Carbide is just that: an alloy. It is not a natural metal, but rather a man-made metal. It is made up of tungsten carbide (WC) and cobalt (Co). Tungsten carbide has a high melting point (2900℃), and will not melt like iron.
What is the material of insert?
Cutting tool inserts are commonly constructed of carbide, micrograin carbide, CBN, ceramic, cermet, cobalt, diamond PCD, high-speed steel, and silicon nitride. Coatings help to increase wear resistance and insert life.
What is insert made of?
The majority of today’s inserts consist of cemented carbide, which results from a combination of tungsten carbide (WC) and cobalt (Co). The hard particles within the insert are WC, while Co can be thought of as the glue that holds the insert together.
What is the difference between tungsten and tungsten carbide?
The biggest and most important difference between them is that tungsten refers to the individual metal, whereas tungsten carbide is an alloy of tungsten and predominantly carbon, although nickel and titanium are among the other metals that might be used. Some websites and jewelers will use the two interchangeably.
Is tungsten carbide toxic to humans?
* Exposure to Tungsten Carbide combined with Cobalt or Nickel can cause a lung allergy with wheezing, coughing and shortness of breath. Repeated exposure may cause scarring of the lungs (pulmonary fibrosis). * Exposure to cemented Tungsten Carbide may result in exposure to Nickel or Cobalt.
What is difference between tungsten and tungsten carbide?
Is tungsten carbide a composite material?
Although called a hard metal, Tungsten Carbide is actually a composite material with hard particles of Tungsten Carbide embedded in a softer matrix of metallic Cobalt .
Are there different grades of tungsten carbide?
There are at least 5,000 different grades of tungsten carbide sold under more than 1,500 different trade names by more than 1,500 different companies. Refer to our Carbide and Advanced Material Index for more information on Carbide Material. There is no true standard.
What are the 2 main coating methods on carbide inserts?
The coatings are of TiN, Al2O3TiN/Al2 O3,TiC/Al2 O3/TiN and nano composite coating respectively. For comparison, uncoated cementedtungsten carbides are also tested under the same cutting conditions. The performance of coated carbide inserts found to be better while compared to that of uncoated carbide inserts.
How carbide inserts are manufactured?
The inserts are heated to approximately 1,500 degrees Celsius in a process that takes some 13 hours and fuses the pressed powder into cemented carbide, an extremely hard material. Shrinkage in the sintering process is about 50 percent, so sintered insert is only about half the size of the pressed piece.
What makes a carbide insert indexable?
To improve the properties, indexable inserts are often coated with hard materials such as titanium carbide or titanium nitride in order to further improve the wear resistance and heat resistance.
How are inserts made?
Does tungsten carbide contain cobalt?
Second, tungsten jewelry often contains cobalt, whereas pieces made of tungsten carbide are usually mixed with nickel. The problem is that when cobalt comes in contact with your skin, the metal can cause irritation. Furthermore, cobalt can also oxidize and cause your tungsten jewelry to change in color.
Is tungsten carbide a carcinogen?
US Dept of Health and Human Services report identifies tungsten carbide-cobalt as carcinogen.
Is tungsten carbide radioactive?
The Radioactivity Problem. The Thorium used in 2% thoriated tungsten is a radioactive element and therefore can be dangerous to the health of those exposed to it and to the environment.