Tool material hate performance improvement and development
It is one of the major manifestations of social progress, which is the material basis for mankind's development. Carbide A composite material made of a refractory metal hard phase and a bonded metal pass-through powder metallurgy process, widely used in modern manufacturing industries for its excellent properties, known as "industrial teeth" , Originated in the 1920s in the world.
With the economic globalization and the progress of science and technology, the use of cemented carbide products is increasingly demanding. Carbide industry technology is also very rapid development, especially carbide cutting tool carbide blade.
The latest carbide machine folder hole machining tools, the use of hard phase grains were 0.2 +0.5 +0.8 m hybrid high cobalt (13%) ultrafine grain size matrix, the tool substrate material strength and hardness are Has been greatly improved, with the overall bit strength close to the blade geometry and clamping clamp blade style and the original design of the drill tip and high performance titanium nitride and titanium aluminum nitride nano-physical coating, reflecting the excellent Cutting performance.
The use of ultrafine grained carbide cemented carbide substrate, together with the temperature of nitrogen carbide chemical coating and fine columnar a-Al2O3 chemical coating, the surface is used to eliminate the surface stress of the post-treatment process, which is removed by shot peening Tensile CVD coating of the tensile stress surface layer, so that the exposed surface of Al2O3 tensile stress decreased by 40%, the inner layer of the coating stress decreased by 20%, significantly improving the blade anti-micro-chipping edge performance and anti-spalling ability in the increase Blade edge integrity and reliability also improve the finish of the coated surface and reduce the bond between the insert and the chip.
Adding a small amount of elements to the cemented carbide strengthens the hard phase and the binder phase of the material, purifies the grain boundaries and significantly increases the flexural strength and impact toughness of the material. Ultra-fine grain cemented carbide and nanostructured coatings become the mainstream trend. At present, the carbide tool technology is moving in the opposite direction of development, on the one hand, universal materials more and more widely applicable, more and more universal. On the other hand, special-purpose materials are more and more targeted, and more to be processed materials and cutting conditions, so as to achieve the purpose of improving cutting efficiency.