Research on Cutting Performance of High Performance Coated Tools for Cutting GH4169 High Temperature Alloy
The cutting problem of difficult to machine material GH4169 nickel based high-temperature alloy is pro-posed,and TiAlN/TiAlSiN composite coating tools are prepared.The main research focuses on the coating microstructure,mechanical properties,and cutting performance of TiAlN/TiAlSiN composite coating cutting tools under different biases when cutting GH4169 nickel based high-temperature alloy.The results show that with the increase of bias voltage,the coat-ing thickness increases,the trend of columnar crystals in the coating is obvious,the surface pores decrease,and the coating density improves.The increase in bias voltage increases the bonding force between the composite coating and the substrate,and the maximum bonding force reaches74.3N when the bias voltage is-100V.The hardness and elastic modulus of the coating also increase with the increase of bias voltage.When cutting GH4169 high-temperature alloy,the cutting wear of coated tools is significantly smaller than that of uncoated tools,and with the increase of bias voltage,the life of coated tools is improved.When the bias voltage is-100V,the cutting life is the highest,which is attributed to the formation of a rela-tively dense protective film with certain lubrication characteristics on the surface due to the oxidation of elements such as Ni,Cr,Al during the cutting process.
coatingbias voltagecutting toolhigh temperature alloy
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