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June 26th, 2008 admin Leave a comment Go to comments

Century Tool
Century Tool

New Research Trends in Special Ceramic Cutting Tool

New special ceramic tool materials there, which is the first time through the use of inorganic ceramic materials mechanical cutting reform of a technological revolution of the new results. About 100 years ago in Europe, Germany and Britain have begun to use ceramic tool to replace the traditional carbon steel knives.

      Special ceramic materials because of their high hardness and high temperature characteristics of a new generation of the tool material, but also because of its well-known ceramics brittle limited, therefore how to overcome the brittle ceramic tool materials, increase its toughness, as the last century Ceramic tools on the main issues. The application of ceramic also growing.

Engineering and technology sector and efforts to promote the development of ceramic tool of the main reasons:

(1) can greatly enhance metal-cutting and processing, and other aspects of the production efficiency

(2) out of the earth's precious resources to consider

      This is due to a high-speed steel and tungsten carbide the major components in the global resource depletion within the scope of the decision. According to geological departments concerned in recent years the preliminary estimate, the world's proven use of tungsten resources Jingou 50 hours. Tungsten is the world's scarce resources, but its cutting tool in the consumption of materials is great, resulting in tungsten ore prices rising, rising for decades in good times, to a certain extent, promoted the development of ceramic knives and Promotion, ceramic tool of research and development has achieved remarkable results.

      Currently used for special ceramic tool has become the material of alumina ceramic, aluminum »metal ceramics, alumina» carbide ceramic, alumina »carbide metal-ceramic, alumina» nitride ceramic and metal success of the latest research nitride Boron ceramics, and silicon nitride ceramic tools, and other materials. But speaking on a global scale, Germany ceramic tool not only for the general machine tools, and has as a highly efficient and stable can * control of the machine tool for processing and automated production lines in Japan in the ceramic blade products, yield and quality Both on the international advanced level in the United States oxides »carbide» nitride ceramic tool has been developed of the world's leading position. Similarly China's current special ceramic tool of research, development, and application also is being made a number of results.

      1, alumina ceramic tool: the special ceramic materials, the use of additives such as pure Al2O3 is conducive to strengthening Al2O3 bending strength, but a decrease of temperature, or as pure alumina ceramic material better. Al2O3 at room temperature ceramic hardness and high temperature is higher than the hardness of carbide materials. Al2O3 ceramics at room temperature under conditions of bending strength Although lower, but with the use of the temperature rise, but less bending strength reduced. Based on the characteristics used for high-speed cutting is quite appropriate. Al2O3 ceramics at room temperature and high temperature strength is good, in particular, can overcome the general high-speed steel and carbide cutting tool blades easily form the deformation and collapse shortcomings. In addition, Al2O3 ceramic heat in the physical nature and anti-oxidation, anti-caking and chemical aspects of inertia can flourish. However alumina ceramic tool in cutting pieces of steel and iron alloy, have a more cohesive and wear and wear gap. Using history as the longest tool material, alumina ceramic tool best suited to high-speed cutting hard and brittle metal materials, such as Chilled cast iron or hardened steel; mechanical parts and components for large high-precision parts used in cutting and cutting Processing. Alumina ceramic tool in the short term, small parts, steel parts of intermittent cutting and Mg, Al, Ti and Be-quality materials, and other materials and alloys, cutting less effective, easy to wear or knives in a proliferation of collapsing and falling off the blade , And other flaws, it is clear this is the shortcomings of its fly in the ointment.

      2, alumina »metal ceramics: Al2O3 ceramic tool to improve toughness, the introduction of material below 10% of Cr, CO, MO, W, Ti, Fe and other metal elements, resulting Al2O3 metal ceramics, such material density, anti - - Bending strength and hardness are improving. However, due to alumina »metal-ceramic tool creep low intensity, oxidation of the poor, and later to promote the use of poor.

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