Diamond Coated Hole

Diamond Coated Hole

Used In Modern High Performance Cutting In The Field Of Advanced Coatings

The most advanced sputtering technology field (high ionization sputtering, HIS) provides a comprehensive description and outlined the future development trend of coating area.

  According to expert analysis, in the next five years, high-speed machining, hard machining, and cutting dry cutting, and other modern ways of the world, particularly China, widely applied. Production efficiency to meet the needs of both machine tool manufacturers or manufacturers must be fully prepared for this. The coating in the role of a very crucial role. Is worth noting that: take into account the future needs of the increasing cutting tool, cutting tool manufacturers have had to be treated as a system tool. Tool substrate material, geometry, edge treatment and coating must be applied according to different conditions of system matching. In addition, the cutting parameters is also one of the factors to be taken into account. If the cutting parameters become very harsh, then the change alone will not be able to get a good coating performance results.

Present study focused on people will be on the (Ti, Al) N based coatings to improve on to meet applications such as oxidation resistance, thermal stability and hot hardness of rising demand. Present by using high ionization sputtering (HIS) get the most advanced (Ti, Al) N coating, the test results revealed that the coating with different matrix materials are combined with excellent strength and is especially suitable for high-performance cutting area (HPC). And other PVD technologies (such as the ARC technology) is different, HIS technology can be evaporated directly from the solid into a gaseous material, it can not avoid using ARC technologies evaporation material in the molten state to form droplets deposited on surface phenomenon, which has a coating obtained by HIS very smooth surface features. This is for those who need a good chip flow and high chip removal rate is very important for applications. HIS Another advantage is that, due to deposition of evaporated material directly from a solid into a gas, so the choice of materials is virtually no limit, in other words, this means that even non-conductive material also can be used to evaporate material. Based on this flexibility, HIS technology as the future development of innovative coating process as the most promising coating technology.

Now introduced a new coating called Supernitrides types. Supernitrides most notable feature is its compact structure of nano-components, while components can be generated with a high content of elements of different oxides. Hard coating such coating will wear resistance and excellent oxidation coatings by conventional chemical stability with a perfect combination shown in the application of excellent thermal stability and chemical stability. It is worth mentioning that this represents the future trend of coating types can only be "plasma assisted sputtering," such as HIS or HIP (high ionization pulse) received. Coating morphology and composition (such as aluminum content, structure, level and smooth surface, etc.) may be the best design according to application needs. Be processed on different materials such as CGI, 42CrMo4, cast iron, tool steel, etc. The drilling, milling, gear hobbing and turning test results confirmed the (Ti, Al) N base Supernitrides superior performance.

Excellent thermal stability, excellent hot hardness and oxidation resistance, together with appropriate toughness, making processing of large quantities of heat is chip away. The higher aluminum content in the coating, cutting the surface of Al2O3 films during the faster, and thus play a more effective tool of protection. 42CrMo6 material from turning on the case can see the curvature of a great chip, this shape is conducive to chip away a lot of heat. According to the status of aluminum content, thermal stability and chemical stability of the temperature and the corresponding temperature can reach 1100 . The higher aluminum content, the better chemical stability. These pictures can be seen through the microscope of aluminum content of 63% of the films were nano-component structure. At the same time, the coating hardness can be increased to about 3.500 ~ 3.700Vickers.

There is a low-silicon aluminum alloy and nonferrous metals for the processing of boron-based material (boron) coating, this coating is also only available through high-ionization pulse technique (HIP) was. Call TiBx or TiBN coating is not easy to bond with aluminum, which has low affinity for aluminum, which can avoid the process of aluminum BUE most headache problem. But at the same time note that the smooth tool surface condition is a critical success factor in aluminum processing, tool to maintain a low surface roughness, making the flow of the chip can not be mechanically bonded to the surface of any chance of cutting tools. This case also illustrates the tool itself, the coating surface morphology and status of the combined effect of the whole cutting process. Some tool manufacturers in Europe during the proposed flank Aluminum been used polished blade. Of course, for such applications, in addition to the polished surface, but also to many other proprietary technologies need to meet. For aviation aluminum alloy processing examples show: not only the tool life was a significant increase, while cutting speed and feed were increased by 2 times and 6 times. Used in the aviation industry such as Aluspeed of (Ti, B) based coating, can greatly increase productivity.

With the future there will be more and more fiber and particulate reinforcements and metal composite materials in automobile manufacturing industry has been adopted, those with higher wear resistance of the material (such as the diamond) will enhance the machining productivity play a unique role. Graphite electrodes for EDM processing abrasive wear as the main form of wear applications, diamond coating is the best option. ISCAR

as Mr. President JacobHarpaz said, in China's automotive industry, high-silicon aluminum alloy (Si> 8%) will play an increasingly important role. In order to obtain very smooth tool surface in order to prevent the BUE and the accumulation of aluminum material, very necessary to use nano-crystalline structure of diamond coating.

Not using the latest design tools and diamond coated tool coating containing 30% SiC in the MMC material drilling comparison results show that uncoated drill 12 holes in the processing occurs after a very serious tool wear, while the diamond coated tools in machining even after the completion of 90 holes hardly any wear and tear. Be noted that the use of PVD coatings can not be used to improve the performance of this material processing tool.

Us look at the future of coatings and related technology trends. Pulsed DC plasma enhanced sputtering technology to control the plasma gas to the material control possible changes in plasma

About the Author

I am an expert from China Quality Digital, usually analyzes all kind of industries situation, such as carbide insert , drill collar.

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