1. Tool material: 1) Coating tool The coated tool is a tool for high-speed cutting that is coated with a hard wear-resistant metal compound film on the tool base to improve the surface hardness and wear resistance of the tool. Commonly used tool base materials are mainly high-speed steel, hard alloy, cermet and ceramic. The coating materials are TiN, TiC, Al2O3, TiCN, TiAlN and TiAlCN. The coating can be a single coating, a double coating or a multiple coating, or even a composite coating of several coating materials. The composite coating may be a TiC-Al2O3-TiN, TCN and TiAlN multi-component composite coating, and a multi-component composite film such as TiN/NbN and TiN/CN has recently been developed. For example, the hole processing tool composite coating with the trade name "Fire" uses TiN as the bottom layer to ensure the bonding strength with the substrate; the intermediate layer composed of multiple thin coating layers is used as a buffer layer for absorbing intermittent cutting. The resulting vibration; the top layer is a TiAlN layer with good wear resistance and heat resistance. In addition, a wear-reducing coating can be applied to the outer layer of the "Fire". Among them, the TiAlN layer has excellent performance in high-speed cutting, and the maximum cutting temperature can reach 800 °C. Some PVD hard coating materials developed in recent years include CBN, CN, Al2O3, polycrystalline nitride (TiN/NbN, TiN/VN), etc. They have good thermal stability at high temperatures, and are suitable for high speed and super high speed. Cutting. Diamond film coated tools are mainly used for non-ferrous metal processing, while C-C3N4 super hard coatings may exceed the hardness of diamond. Soft-coated tools, such as MoS2 and WS2, are high-speed steel tools used as coating materials for high-strength aluminum alloys and titanium alloys. In addition, the newly developed nano-coated material tools have a broad application prospect in high-speed cutting. For example, Sumitomo Corporation's nano TiN/AlN composite coated milling inserts have a total of 2000 layers of coating, each layer is only 2.5nm thick. 2) cermet cutter The cermet mainly includes TiC-based hard alloy (TiC+Ni or Mo) with high wear resistance, TiC-based hard alloy (TiC+TaC+WC) with high toughness, tough TiN-based cemented carbide and high toughness. TiCN-based cemented carbide (TiCN+NbC) and the like. The tools made of these alloys can be used for high-speed finishing steel and cast iron in the range of vc=300~500m/min. The cermet can be made into drills, milling cutters and hobs. For example, the cermet hob developed in Japan, vc = 600m / min, about 10 to 20 times the hardness of the carbide hob, the roughness value of the machined surface Rmax is 2μm, than the HSS hob (Rmax15μm) and the carbide roll The knife (Rmax 8 μm) is much smaller, the wear resistance is 4 times that of HSS and twice that of cemented carbide. 3) Ceramic knives Ceramic tools can cut materials such as mild steel, hardened steel and cast iron in the range of vc=200~1000m/min. 4) CBN cutter CBN tools are ideal tool materials for high-speed finishing or semi-finishing hardened steel, chilled cast iron and high-temperature alloys, which can achieve “car grindingâ€. CBN tools with different CBN content have been developed abroad to fully utilize CBN. Cutting performance of the tool (see table below). According to reports, CBN300 processing gray cast iron speed can reach 2000m / min. Next page Fasteners Bolt,Double Threaded Bolt,Din931 Hexagon Bolts,Double End Threaded Bolts Stud Suzhou Gubao Screws Co.,Ltd. , https://www.gbscrewes.com