Cemented carbide is a type of hard material that is utilized extensively to serve as a leading cutting tool material. It is also utilized in other types of industrial applications. Cemented carbide is known to consist of carbide particles that are cemented into the composite with the help of a binder metal. Cemented carbides are mostly known to make use of WC or tungsten carbide, TiC (Titanium Carbide), or TaC (Tantalum Carbide) to serve as the aggregate. Specifications of tungsten carbide or carbide in industrial contexts are known to refer to the given cemented composites.
In most instances, carbide cutters are known to leave an improved surface finish on the given part. This allows for improved machining speed in comparison to high-speed steel and other types of tool steels. The top-grade carbide tools from leading providers like Ceratizit are capable of withstanding higher temperatures at the interface of cutter-workpiece in comparison to the standard high-speed tools made of steel. This is the main reason for ensuring faster machining with cemented carbide.
Carbide is mostly considered as superior for cutting of tough materials like stainless steel or carbon steel. Moreover, it is also utilized is conditions wherein cutting tools tend to wear away faster –including production runs of higher quantities.
Composition of Cemented Carbide
Cemented carbides are available in the form of metal matrix composites in which carbide particles serve as the aggregator. Here, the metallic binder is known to play the role of the matrix –for instance, gravel aggregate in the matrix of cement is helpful in making cement. The structure is, therefore, similar to that of the grinding wheel. The only exception is that abrasive particles tend to be much smaller. The material of the carbide cutter appears homogenous.
The procedure of combining the respective carbide particles with the given binder is known as HIP (Hot Isostatic Pressing) or sintering. During the given procedure, the binder is going to eventually enter into the liquid stage with the carbide grains remaining in the solid stage. Due to the given procedure, the binder cements or embeds the respective carbide grains. Therefore, it helps in the creation of metal matrix composite featuring unique material properties. The binder that is ductile metal in its natural form aims at offsetting the innate brittle characteristic of carbide ceramic. Therefore, the overall durability and toughness increase.
When the given set of parameters are controlled properly –including cobalt content, dotation, grain size, & carbon content, the relevant carbide manufacturer can look forward to tailoring the overall performance of carbide to particular applications.
The first-ever cemented carbide that was developed was in the form of tungsten carbide (launched in the year 1927). It is known to make use of tungsten carbide particles that are organized together with the help of a binder made out of cobalt metal. From the given time, there has been major development of cemented carbide – like titanium carbide. This is regarded as properly suited for cutting steel.