The steel turning brands GC4225 and GC4235 newly launched by SandvikCoromant Company in Sweden adopt gradient cemented carbide matrix with ultra-fine grains, with medium-temperature chemical coating of titanium nitride carbide (MT-CVD) and fine-grained columnar a-Al2O3 chemical coating, and the surface is treated by post-treatment process to eliminate surface stress. That is, the tensile stress surface layer (TiN) of CVD coating on the rake face is removed by shot peening, so that the tensile stress of Al2O3 exposed on the surface is reduced by 40% and the stress of the inner coating is reduced by 20%, which significantly improves the micro-crack resistance and spalling resistance of the blade, improves the integrity and reliability of the blade, improves the smoothness of the coating surface and reduces the adhesion between the blade and chips. GC4225 can cover 80% of the application fields from rough machining to finish machining. Compared with the general P25 blade, the tool life can be increased by 60% and the production efficiency can be increased by 33%. GC 4225 is the first choice for steel processing. Two years ago, Zhuzhou Smelter Diamond Tool Co., Ltd. launched the YBD series black diamond brand for cast iron processing, and the newly launched second-generation black diamond series brands-YBC152 and YBC252 also adopted gradient cemented carbide matrix materials with cobalt-rich surface, with thick fibrous TiCN and fine grain Al2O3 CVD coatings, which have strong plastic deformation resistance and cutting edge strength, and are particularly suitable for high-speed processing of steel. Under the same cutting conditions, the cutting speed of the new generation of black diamond brand blades can be increased by more than 25%; At the same cutting speed, the tool life can be increased by more than 30%. At this exhibition, new brands of gradient cemented carbide matrix materials with cobalt-rich surface were also introduced: KU30T, the general material brand of Kennametal Company of the United States, VP5535, the processed stainless steel brand of Valenite Company, and a-TEC series of improved Al2O3MT-CVD composite coatings of ISCAR Company of Israel (such as IC9 150, IC9250 and IC9350).
Adding a small amount of elements into cemented carbide can strengthen the hard phase and bonding phase of the material, purify the grain boundary and significantly improve the bending strength and impact toughness of the material. ACE series coating brands (AC700G, AC2000, AC3000) launched by Sumitomo Electric Cemented Carbide Co., Ltd. in Japan use cemented carbide matrix materials containing zirconium (Zr), which greatly improves the red hardness of the new brand matrix materials. The new brands of HG series coatings (HG80 10, HG8025) newly launched by Hitachi Tool Technology Co., Ltd. adopt a new CVD coating technology called "triple zirconium effect". Its "first zirconium effect" is to add zirconium (Zr) to the cemented carbide matrix to improve the high-temperature deformation resistance of the matrix. The "second zirconium effect" is to use fine-grained columnar zirconium (Zr) coating to replace the usual MT-TiCN coating, thus improving the oxidation resistance of the coating. The "third zirconium effect" is to coat a layer of white zirconium (Zr) on the surface of the coating to improve the lubricity, heat resistance and spalling resistance of the tool surface. This new type of coated blade has good heat resistance and is especially suitable for efficient machining. Compared with the traditional blade, it can improve the processing efficiency 150% and reduce the processing cost by 20 ~ 30%.
Ultra-fine grained cemented carbide has been widely used. In addition to the ultra-fine grained cemented carbide matrix used by the above-mentioned new brands, the new brands KC5525 and KC55 10 introduced by Kenner Metal Company also use ultra-fine grained cemented carbide matrix with cobalt content of 10% and TiAlNPVD coating with high aluminum content, so that the tool has high edge toughness and strong thermal deformation resistance during intermittent cutting. "AL-TEC" coating series (such as IC900, IC903, IC908, IC9 10, etc. The ultra-fine grain cemented carbide matrix and TiAlN(PVD) coating with high aluminum content are also adopted, which makes it similar to the performance when milling hardened steel with hardness as high as 60 ~ 62 HRC. The VP 1595 brand of Valenite Company, which is used for high-speed turning of cast iron, is also coated with 18μm TiCN/Al2O3/TiC coating on the ultra-fine grained cemented carbide substrate by MT-CVD method, and the back is coated with a layer of gray TiC, so as to observe the wear of the cutting edge of the tool and the indexing of the blade. This brand has higher machining efficiency than other K05 ~ K60 when roughing ductile iron. It can be seen from the above-mentioned new brands that with the improvement and improvement of the performance of matrix materials, the tool coating technology has made a faster development. A large number of new coatings, such as intermediate temperature chemical coating, columnar a-Al2O3 chemical coating, high performance physical coating, new atomic coating, nano-structure coating, yellow alumina chemical coating, white zirconium coating, high aluminum TiAlN coating, TiSiN coating, CrSiN coating, AlCrSiN coating and TiBON coating, are diversified and serialized, which makes new brands of cemented carbide materials emerge one after another, and greatly improves the cutting performance of cemented carbide tools.
SECO in Sweden launched three high-performance ISO-P cemented carbide coating brands, TP 1000, TP2000 and TP3000, two years ago, and newly launched a new brand of TP2500 universal ISO-P cemented carbide coating, which is called the "new industry standard". It is based on Seco's new generation of three-zero matrix material, called DurAtomic. α-al2o 3 with durable atomic coating grows from atoms. Compared with α-al2o 3 prepared by CVD coating, DurAtomic coating has higher wear resistance and toughness. TP2500 is designed as the first choice for turning ordinary steel parts (ISOP 15 ~ P30), and can also be used as a supplementary brand of ISOM20 and ISOK30. According to Suncor's technicians, the new TP2500 blade can improve the machining efficiency by more than 50% and the tool life by more than 300%.
LMT-BOEHLERIT, a metal processing technology group in Lan Zhi, Germany, developed the technology of "yellow aluminum oxide composite coating" by using the medium-temperature chemical coating technology, and combined with the newly developed technology of Durotec dentate transition layer, which made the yellow aluminum oxide coating and transition layer have excellent adhesion and good heat dissipation, and launched the steel CLC 2 15K and LC225K series blade brands. Steel CLC215K can cut steel at a cutting speed of more than 300m/min, and the service life of the blade is 30% longer than that of other existing blades. On the other hand, on the basis of LC2 15K, SteeltecLC225K further improves the toughness of the blade and prolongs the service life of the blade by 30%.
Nano-coating technology is a rapidly developing new coating technology. The grain size of the coating material is generally below 100nm, which has good cutting performance. At this exhibition, many companies at home and abroad have launched new brands of nanostructured coatings. Super ZX coating brands (ACP200, ACP300, ACK300, AC530U) introduced by Sumitomo Electric Cemented Carbide Company of Japan adopt ultra-thin TiAlN and AlCrN nano-scale coatings, with a total overlapping number of layers of 1000, and the thickness of each layer is about 10 nm, which greatly improves the hardness and oxidation resistance of the coating surface. Compared with the traditional TiAlN coating, the hardness of the super ZX coating is increased by 40%, and the initial oxidation temperature is also increased by 200℃, so that the machining efficiency of the tool is improved by 65438 0.5 times. Under the same cutting conditions, the tool life is increased by 2 times. Hitachi, Japan has also introduced a new brand of nanostructured coatings. Compared with the usual brand of TiAlN(PVD) coating, the new brand of nanostructured coatings ATH and ACS have higher hardness and oxidation resistance, with the oxidation resistance temperature reaching 1 100℃ and microhardness reaching 3600HV, which can be applied to high-speed dry cutting from pre-hardened steel to quenched steel. The new brands of nano-structured nc-TiAlN coating (YBG 102, YBG202, YBG302, YBG203) newly launched by Zhuzhou Diamond Tool Co., Ltd. are to coat 2 ~ 4 micron nano-TiAlN on the surface of ultra-fine grained cemented carbide substrate. This series of brands covers the turning and milling of most materials such as steel, stainless steel, cast iron, heat-resistant alloy, high-temperature alloy and titanium alloy, and has a wide range. In coating, it is also a development direction of coating technology to improve the surface smoothness and smoothness of coating by grain refinement technology, so as to improve the anti-friction and anti-sticking ability of coating tools. The patented technology UC6 1 10 super-coated cemented carbide brand introduced by Mitsubishi Materials Co., Ltd. in Japan, the rake face is a nano-structured CVD coating composed of TiCN and nano-alumina which inhibit crystal growth, with extremely high toughness and super wear resistance, and the outer surface is a layer of yellow special Ti metal compound, which makes the coating surface smoother. Black super-smooth coating is adopted on the back to ensure the stability of tool wear. The brand of super FF coating (AC4 10K, AC6 10M, AC630M, ACP 100, ACK200) newly launched by Sumitomo Electric Cemented Carbide Co., Ltd. is to coat ultra-fine grain TiCN on a special cemented carbide substrate to improve the bonding force between the coating and the substrate, and then coat an ultra-fine and ultra-smooth FF aluminum base film on it.
From the new brands of cemented carbide tool materials introduced in this exhibition, we can see that the brands of cemented carbide tool materials are developing in two opposite directions at present. On the one hand, the use of generic brands is becoming more and more widespread and universal. On the other hand, special brands are more and more targeted and more suitable for processing materials and cutting conditions, thus achieving the purpose of improving cutting efficiency. For example, the new KU series (KU 10T, KU25T, KU30T) introduced by Kennametal Company in the United States has very wide versatility. Among them, KU 10T and KU25T are made of cemented carbide matrix with high toughness and wear resistance, and are matched with TiN+TiAlN composite PVD coating with high aluminum content; On the other hand, KU30T adopts gradient cemented carbide matrix with excellent toughness and TiCN+TiCN composite CVD coating. The new KU series brand can be widely used in turning, boring, slotting, cutting and threading of steel, stainless steel, cast iron, non-titanium alloy, superalloy and hard materials. The new KC55 10 and KC5525 are specially designed for high-efficiency machining of superalloys. The fine-grained high-cobalt cemented carbide matrix and high-performance TiAlNPVD coating make the blade have strong thermal deformation resistance, which can increase the cutting speed by more than 2 times compared with other PVD coated tools. T6000 series brands (T6020 and T6030) launched by Tungaloy superhard tools Co., Ltd. in Japan are CVD brands specially developed for stainless steel turning. The DO-TEC coating brand (DT7 150) specially designed for high-speed milling of gray cast iron and nodular cast iron introduced by ISCAR Company adopts the composite coating technology of Al2O3-MTCVD inner coating and TiAlNPVD outer coating, which has extremely high wear resistance and spalling resistance.
It can be seen from this exhibition that the performance of diamond CVD coated tools has been further improved, and the products cover rotary tools and integral cemented carbide tools. Xiamen Lujin Special Materials Co., Ltd. exhibited the newly developed "Shuangqing" series ultra-fine grained diamond coated end mills. Compared with ordinary diamond coatings, the "Shuangqing" series diamond coatings are ultrafine crystals with an average particle size of.