Carbide blades are the most widely used type of high speed machining cutting blades in mechanical production industry, cemented carbide is produced by powder metallurgy process, composed of hard carbides (usually WC) particles and softer metal binder. The use of carbide blade processing can give users a better surface roughness. Carbide blades have strong impact resistance, the blade will not break suddenly, the use of more security.
At present, there are hundreds of different components of cemented carbide blades, Carbide Inserts most of them using cobalt as a binder, nickel and chromium are also commonly used binder elements, but also can add some other alloying elements. Why are there so many cemented carbide grades? How does the carbide blade manufacturer Choose the right blade material for a particular cutting process?
The properties of cemented carbide blades are the basic factors affecting the quality of machined surface, cutting efficiency and the life of blades. Cutting process, Carbide Inserts directly bear the cutting work is the cutting part of the blade. The cutting performance of the blade mostly depends on the material of the cutting part of the blade, the geometrical parameters of the cutting part and the selection of the circular blade structure and the reasonable design.
Carbide blades in the cutting process of productivity and blade durability, blade consumption and processing costs, processing precision and quality, and so on, to a large extent, Carbide Inserts depends on the blade material reasonable choice. Selection of carbide blade material is one of the important contents of the design and selection of blades.
Hardness is the basic characteristic of cemented carbide blade materials. Carbide blades to cut the chip from the workpiece, the hardness must be greater than the workpiece material hardness. The second is the heat resistance of cemented carbide blades, which is the main indicator of the cutting performance of the blade material. Carbide Inserts It refers to the blade material in the high-temperature conditions to maintain a certain degree of hardness, wear resistance, strength and toughness performance.
In many cases, the finished workpiece needs to be coated. The coating provides the lubrication and hardness of cemented carbide blades, and provides a diffusion barrier for the substrate to prevent oxidation when exposed to high temperatures. Carbide blade substrates are critical to the performance of the coating.
Compared with many other mechanical blades, cemented carbide blade is a special mechanical blade, Carbide Inserts its comprehensive performance and processing quality is much higher than the ordinary blade, its processing costs are relatively high, then we choose carbide blade when should pay attention to what? Here's a brief introduction to the basic properties and identification methods of cemented carbide blades.
The working part of the carbide blade is the part that produces and processes the chip, including the blade, the structure that makes the chip broken or coiled, Carbide Inserts the space of the chip or the chip, and the channel of the cutting fluid. Therefore, the selection of carbide blades must pay attention to the blade sharpening condition.
The harder the material of cemented carbide blades is, the better the wear resistance, the higher the hardness, the lower the impact toughness, the more brittle the material. Hardness and toughness are a pair of contradictions, but also the blade material should be overcome a key. For cemented carbide blades, the ordinary coating can be selected on the appropriate selection of toughness is relatively better, that is, cobalt content slightly higher one points.
The geometrical parameters of the cutting parts of cemented carbide blades have great influence on the cutting efficiency and the quality of machining. By increasing the rake angle, the plastic deformation of the cutting layer can be reduced and the friction resistance of the chip through the front is reduced, Carbide Inserts thus reducing the cutting force and cutting heat. But increasing the front angle will reduce the strength of the cutting edge and reduce the heat dissipation volume of the cutter head.
Because the hardness of carbide blades is very high, the strength and toughness is obviously lower than other blades, so in the installation and removal of blades to avoid blade collision two caused the blade to crack, from this can also distinguish the carbide blade difference.
The second is from the cemented carbide blades on the brand distinction, I believe this is the most common is the most convenient way, so you should pay attention to the selection of carbide blades to distinguish the brand.
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