Titanium-aluminium-nitride (Ti1-xAlxN) coatings were deposited by close-field un balanced magnetron sputtering on M42 steel substrates and WC-6wt%Co inserts at 4 50℃. The tribological behavior was analyzed by sliding...Titanium-aluminium-nitride (Ti1-xAlxN) coatings were deposited by close-field un balanced magnetron sputtering on M42 steel substrates and WC-6wt%Co inserts at 4 50℃. The tribological behavior was analyzed by sliding against steel and WC- 6wt%Co balls, while the turning performance was evaluated by a conventional tu rning machine at high cutting speeds without using coolants. In the tribological tests, the formation of transfer layer and the variations of hardness of the co atings played an important role for sliding against steel balls. For the coating s sliding against WC-6wt%Co balls, the Ti-Al-N coatings showed a similar frictio n coefficient, but the TiN coating exhibited a lower value. The difference could be explained by the tri-oxidation wear mechanism. In the turning tests, a super ior cutting performance of the coating was found at x=0.45, which endured 38 min utes before the tool flank wear reached the maximum value of 0.3mm, whereas only 20 minutes were endured for the TiN coating. The excellent performance of the c oatings in the turning tests could be explained by the enhanced mechanical prope rties and oxidation/diffusion resistance of the coatings.展开更多
(Ti, Al)N gradient nano-coating was deposited on the surface of 1Cr11Ni2W2MoV stainless steel by the MTP-8-800 arc ion plating equipment. And the oxidation performance at high temperature for 500h was tested under t...(Ti, Al)N gradient nano-coating was deposited on the surface of 1Cr11Ni2W2MoV stainless steel by the MTP-8-800 arc ion plating equipment. And the oxidation performance at high temperature for 500h was tested under the condition of the surrounding air temperature 700℃. The test results show that, because of the structural features of the （Ti, Al）N coating, the coating becomes the compact and continuous Al2O3 film, which can protect the basis material effectively in the process of the high temperature oxidizing. The oxidation kinetics of the coating accord with parabolic law.展开更多
基金the financial supports from the National Natural Science Foundation of China(No.52065009)the Science and Technology Planning Project of Guizhou Province,China(No.ZK2021269)the Science and Technology Planning Project of Guiyang,China(No.2021.1-4)。
文摘Titanium-aluminium-nitride (Ti1-xAlxN) coatings were deposited by close-field un balanced magnetron sputtering on M42 steel substrates and WC-6wt%Co inserts at 4 50℃. The tribological behavior was analyzed by sliding against steel and WC- 6wt%Co balls, while the turning performance was evaluated by a conventional tu rning machine at high cutting speeds without using coolants. In the tribological tests, the formation of transfer layer and the variations of hardness of the co atings played an important role for sliding against steel balls. For the coating s sliding against WC-6wt%Co balls, the Ti-Al-N coatings showed a similar frictio n coefficient, but the TiN coating exhibited a lower value. The difference could be explained by the tri-oxidation wear mechanism. In the turning tests, a super ior cutting performance of the coating was found at x=0.45, which endured 38 min utes before the tool flank wear reached the maximum value of 0.3mm, whereas only 20 minutes were endured for the TiN coating. The excellent performance of the c oatings in the turning tests could be explained by the enhanced mechanical prope rties and oxidation/diffusion resistance of the coatings.
文摘(Ti, Al)N gradient nano-coating was deposited on the surface of 1Cr11Ni2W2MoV stainless steel by the MTP-8-800 arc ion plating equipment. And the oxidation performance at high temperature for 500h was tested under the condition of the surrounding air temperature 700℃. The test results show that, because of the structural features of the （Ti, Al）N coating, the coating becomes the compact and continuous Al2O3 film, which can protect the basis material effectively in the process of the high temperature oxidizing. The oxidation kinetics of the coating accord with parabolic law.
