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The versatility of carbide cutting tools will be more and more strong
Release time:
2024-11-01
Source:
At present, carbide tool technology is developing in two opposite directions. On the one hand, the application of general-purpose materials is becoming wider and wider, and the versatility is becoming stronger. On the other hand, special-purpose materials are more and more targeted and more suitable for the processed materials and cutting conditions, so as to achieve the purpose of improving cutting efficiency.
Materials are the material basis for human development and one of the main manifestations of social progress. Cemented carbide is a composite material made of refractory metal hard phase and bonded metal through powder metallurgy process. It is widely used in modern production and manufacturing industry for its properties. It is called "industrial teeth" and originated in the 1920's of the world.
With the economic globalization and the increasing progress of science and technology, the use of cemented carbide products is becoming more and more demanding. Cemented carbide industry technology development is also very rapid, especially the carbide tool carbide blade.
The new cemented carbide machine clamping tool adopts a hybrid high cobalt (13%) ultrafine grain size matrix with hard phase grains of 0.2+0.5 + 0.8μm respectively, which greatly improves the strength and hardness of the tool matrix material. The cutting performance is reflected by the geometric structure and clamping method of the machine clamping blade close to the strength of the integral drill bit, the drill tip design and the high-performance titanium nitride and titanium nitride aluminum nano-physical coating.
A gradient cemented carbide substrate with ultra-fine grains is adopted, with a titanium nitride carbide medium-temperature chemical coating and a fine-grained columnar a-Al2O3 chemical coating. The surface is treated with a post-treatment process to eliminate surface stress, I .e. the tensile stress surface layer of the CVD coating on the rake surface is removed by shot peening, so that the tensile stress of Al2O3 exposed on the surface is reduced by 40%, and the stress of the inner coating is reduced by 20%, it improves the anti-chipping performance and anti-peeling ability of the blade, improves the integrity and reliability of the blade, and also improves the smoothness of the coating surface, and reduces the adhesion between the blade and the chip.
The addition of a small amount of elements in cemented carbide can strengthen the hard phase and the binder phase, purify the grain boundaries and significantly improve the bending strength and impact toughness of the material. Ultrafine grained cemented carbide and nanostructured coating become the mainstream trend. At present, carbide tool technology is developing in two opposite directions. On the one hand, the application of general-purpose materials is becoming wider and wider, and the versatility is becoming stronger. On the other hand, special-purpose materials are more and more targeted and more suitable for the processed materials and cutting conditions, so as to achieve the purpose of improving cutting efficiency.
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