With the rapid advancement of science and technology, the demand for improved material surface properties has grown significantly. Over the past few decades, the emergence of various vapor deposition techniques has driven substantial progress in surface engineering. These technologies not only meet mechanical performance requirements like wear resistance, friction reduction, and corrosion protection but also play a crucial role in functional materials related to electromagnetics, optics, optoelectronics, thermal management, superconductivity, and biotechnology. Surface engineering enables cost-effective metal materials to perform better in terms of efficiency and durability, making it a key approach in the development of new coatings and thin films with broad application potential.
As the machining industry continues to evolve, tools are now required to meet higher standards. In addition to extending tool life, there is an increasing focus on minimizing cutting pollution and using dry cutting methods whenever possible. When cutting fluids are still necessary, they should contain only rust inhibitors without organic compounds, which can significantly lower recycling costs and reduce environmental impact.
The variety of cutting tools and their different operational characteristics influence the selection of coatings used in Jiangsu tool manufacturing. Unlike turning or drilling, milling cutters must account for intermittent impacts. Early coating developments primarily focused on wear resistance, aiming to increase hardness as the main goal. Coatings such as titanium nitride, while effective, have a high coefficient of friction (0.4–0.6), leading to significant heat generation during continuous contact between the tool and workpiece. To prevent overheating that could cause tool deformation and affect machining accuracy, cutting fluids are often used.
To address the need for reducing or eliminating cutting fluids, modern tool coatings must not only extend tool life but also offer self-lubricating properties. Diamond-like carbon (DLC) coatings have shown promise in machining certain materials like aluminum, titanium, and their composites. However, long-term research has revealed issues such as high internal stress and poor thermal stability. Additionally, the catalytic effect between ferrous metals and the SP3 bonding structure limits DLC’s use to non-ferrous materials, restricting its broader application.
Recent studies, however, have introduced a new type of DLC based on an SP2 structure. These coatings achieve hardness levels of 20–40 GPa, exhibit low friction coefficients, excellent moisture resistance, and can be used for dry cutting. They perform well with steel materials and have proven to last more than twice as long as uncoated tools. This innovation has attracted significant attention from coating companies and tool manufacturers, signaling a promising future for this advanced coating technology in the cutting industry.
Aluminum tube is a kind of metal products widely used in industry and daily life, he can be customized according to different requirements, so aluminum tube can be divided into a variety of types: seamless aluminum tube, precision aluminum tube, welded aluminum tube, cold drawn aluminum tube, hot rolled aluminum tube and other types. It has the advantages of environmentally friendly recyclable, high quality, high weather resistance, corrosion resistance and so on. Aluminum tubes can be used in the construction industry, electronic equipment, automobile manufacturing, aerospace, medical equipment and other fields. All in all, driven by future scientific and technological innovation, aluminum tubes will continue to upgrade and adapt to many fields such as the new energy industry. Aluminum tube will rely on its all-round advantages, vertical and horizontal construction, chemical, automotive, electronics and many other fields. The application range of aluminum tubes will be further expanded in the future.
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