Insoll tools technology co.,LTD can be a high-tech enterprise that committed to the production of CBN cutting tools as well as other super hard material products,and the first R&D company target cutting tools for gray certain,all kinds of wear resistant cast iron/cast steel,harden steel materials with this industry.
Ultra hard materials will be the result of modern research and development. The last century witnessed extra ordinary development in many fields of science including material science. The newest developments in science and technology resulted in the use of very hard materials in mechanical, automobile and aviation fields. Thus resulted in the development of new ultra hard cutting materials to machine these parts. Beside carbide cutting tools a number of other ultra hard materials like ceramic, polycrystalline diamond (PCD), monocrystalline diamond (MCD-natural diamond), diamond coatings on cutting tools, synthetic monocrystalline diamonds as well as polycrystalline cubic boron nitrite are developed.
Polycrystalline Diamond (PCD)
Polycrystalline diamond plates are made by high temperature and also pressure process the place that the diamond coating is directly along with a carbide support. Polycrystalline diamond is made by sintering of high quality diamond powder with metallic binder. Dependant on the application polycrystalline diamond materials can be found in various grain sizes. Including the diamond with rough grain sizes bring making cutting tools with excellent wear resistance because ability to retain technologically advanced for a longer period. Incase you will need very high surface finish on machines parts, then ultra micro grain sizes are highly preferred. Medium grain sizes can be used general all purpose cutting tools since it is a balance between high wear resistance of rough grain size and superior finish of ultra micro grains. As a result the medium grain sized polycrystalline diamond just as one excellent ultra hard material for manufacturing high quality metal cutting tools.
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Mono crystalline diamond (MKD) is natural diamond from pure carbon. These natural diamonds enable the production of geometric defined flutes with absolutely notch free flutes. Natural diamond (MKD) is on with the ultra hard materials that is suitable for achieving very high surface finishes for mirror bright surfaces, machining of non-ferrous materials, micro machining and machining of titanium without burr.
Synthetic Monocrystalline Diamond
Further development and research resulted in synthetic mono crystalline diamonds which are available in triangles and rectangles with an edge duration of approximately 8mm. The natural diamonds often contains nitrogen along with the it could have varying hardness and thermal conductivity. Whereas the synthetic monocrystalline diamonds have uniform structure with constant thermal conductivity and less internal stress. Today synthetic monocrystalline diamonds are increasingly being produced in various sizes and shapes which offers great application probabilities of this ultra hard material in future. Researches have found considerable improvements in synthetic monocrystalline tool life, improved surface finish and constant wear behavior in comparison to other ultra hard materials like PCD and natural diamond.
Diamond Film Coating (CVD Process)
Diamond film coatings are performed to improve the surface hardness of cutting tools. Generally diamond film coatings may be classified into two. The thin diamond film coating with a layer thickness around 5-20 microns and thick diamond film coating with a layer thickness of roughly 0.5mm. Higher thermal and chemical stability and ultra surface hardness are the advantages of diamond film coating. Low fracture toughness is the disadvantage of of diamond film coatings. And in comparison to polycrystalline diamonds no binder can be used while producing diamond film coatings which then causes higher splintery fracture.
Diamond film coated ultra hard materials would be better suitable for machining of aluminium alloys with high silicium contents as well as graphite and carbon. Tests show great use of diamond coated tools in machining plastics, gold alloys and wood machining.
Polycrystalline Cubic Born Nitrite (CBN)
Polycrystalline Cubic Born Nitrite is the hardest cutting material after ultra hard materials like ceramics and diamond. CNB is done by a sinter process of temperature and pressure using selected particles of Cubic Born Nitrite. Determined by various cutting applications polycrystalline cubic born nitrite can be purchased with with different binder phases plus in fine, medium and rough grain structure. CNB can be an ultra hard material with excellent thermal stability approximately 1200°. Polycrystalline Cubic Born Nitrite with low cbn contents is principally used in precision machining of hardened steel along with other hard ferrous materials.
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