Rock drill bits are essential tools widely used in the engineering field. Because of its excellent performance, it provides many advantages for industrial production and is favored. Cemented carbide is a component of rock drill bits and guarantees their high performance.
What is cemented carbide?
Cemented carbide is an alloy material made of a hard compound of refractory metal and bonding metal through the powder metallurgy process. It has the general features of high hardness, high wear resistance, high elastic modulus, high compressive strength, good chemical stability, low impact toughness, and thermal and electrical conductivity are similar to those of iron and its alloys.
Classification of cemented carbide
1. Tungsten and cobalt carbide: the main components are tungsten carbide (WC) and cobalt binder (Co).
2.Tungsten-titanium-cobalt carbide: the main components are tungsten carbide, titanium carbide (TiC), and cobalt.
3. Tungsten-titanium-tantalum (niobium) carbide: the main components are tungsten carbide, titanium carbide, tantalum carbide (or niobium carbide), and cobalt. This kind of carbide is also called universal carbide.
Among them, tungsten carbide is the type with the largest output and the most extensive use and is also used in mining tools such as rock drill bits.
Carbide drill bits are mainly used in rock drilling and other working environments and are installed in rock drills and air pressure DTH equipment. It is necessary to install the coarse crystal WC-CO alloy drill bit with high hardness and toughness on the rock drill to effectively break all kinds of high hardness rocks.
The wear of carbide drill bits is mainly impacting cracking and impact fatigue. Under the impact energy, the contact between the drill bit and the rock is born to high compressive stress. The compressive strength of carbide is very high, and it is still competent for this compressive stress. However, the contact between the drill bit and the rock, there are some uncontacted or poor contact places, resulting in high tensile stress and shear stress. When these two stresses exceed the strength limit of the alloy, it will cause partial collapse and desquamate of the drill bit. If the toughness of the carbide is high, this condition can be avoided prematurely. The carbide toughness is affected by Co content and the mean degree of freedom of the Co phase. Based on this, coarse-grained WC-Co alloy drill bits are widely used in the rock drilling industry.
Advantages of carbide drill bits
Super hardness and wear resistance
Carbide drill bits are known for their high hardness and are usually composed of hard materials such as tungsten carbide. It has excellent wear resistance, which significantly extends its service life.
Good heat resistance
Under a high-temperature environment, the cemented carbide drill bit can still maintain stable performance. It allows the drill bit to perform well without losing its ability to drill holes, which increases efficiency and accuracy.
Excellent performance
The excellence of the carbide drill bit enables precise drilling operations to meet the needs of the working conditions.
Wide range of application fields
Carbide drill bits are mainly used in mining engineering, oil exploration, national defense engineering, and other industries that require rock drilling, providing critical support for industrial production.
High efficiency and low energy consumption
The tungsten carbide button bit has a free button arrangement, unlimited diameter upper limit, and no need for grinding, which is conducive to speeding up the project’s progress and improving the working conditions of workers. It has the characteristics of high efficiency and low consumption.
High utilization rate
The cemented carbide composite chip drill bit has high rock-breaking efficiency, good overall solidity, strong impact capacity, radial wear resistance, stable quality, unlimited lower limit of diameter, high alloy utilization rate, and can be recycle.
To sum up, with their superior performance, cemented carbide drill bits provide efficient and reliable solutions for the engineering field and play a significant role in promoting the development of industrial production.
