现代金属切削加工正向着高速、高精度和高效的方向发展,对刀具的性能有着越来越高的要求。利用表面技术对刀具表面进行改性,是提高刀具性能和寿命的有效途径。使用多弧离子镀膜技术在YG6硬质合金以及三刃立铣刀表面制备了Cr Al N/CrN/Cr...现代金属切削加工正向着高速、高精度和高效的方向发展,对刀具的性能有着越来越高的要求。利用表面技术对刀具表面进行改性,是提高刀具性能和寿命的有效途径。使用多弧离子镀膜技术在YG6硬质合金以及三刃立铣刀表面制备了Cr Al N/CrN/Cr、TiAlN/CrN/Cr、Cr Al N/TiAlN/CrN/Cr三组涂层,并对三种涂层的制备技术、微观结构与性能差异、及耐磨与切削寿命提高机制进行研究。X射线衍射分析表明,三种涂层均为面心立方结构,其中TiAlN涂层表现出(200)晶面择优取向,而CrAlN和Cr Al N/TiAlN涂层则表现出(111)面的择优取向。使用显微硬度计和划痕仪对涂层的显微硬度和结合力进行测试,结果表明Cr Al N/TiAlN多层涂层的显微硬度和膜基结合力分别为2651 HV和59.2 N,显著高于TiAlN和CrAlN涂层。采用高温摩擦试验机评价了三种涂层的摩擦学性能,结果表明Cr Al N/TiAlN多涂层的摩擦性能优于TiAlN涂层和CrAlN涂层,室温下其平均摩擦因数和磨损率分别为0.603和2.92×10^(-6)mm^(3)(N·m)^(-1)。当温度增加到400℃时,Cr Al N/TiAlN涂层的平均摩擦因数进一步降低为0.467,磨损率增加至1.31×10^(-5)mm^(3)(N·m)^(-1)。铣削试验结果显示,TiAlN涂层刀具、CrAlN涂层刀具和Cr Al N/TiAlN涂层刀具的铣削寿命相对于无涂层刀具分别提升了80%、140%和200%,被加工样件的表面粗糙度分别降低至462 nm、415 nm和402 nm。研究结果表明Cr Al N/TiAlN涂层在现代切削加工领域有着良好的应用潜力。展开更多
Physical Vapor Deposited(PVD)TiAlN coatings are extensively utilized as protective layers for cutting tools,renowned for their excellent comprehensive performance.To optimize quality control of TiAlN coatings for cutt...Physical Vapor Deposited(PVD)TiAlN coatings are extensively utilized as protective layers for cutting tools,renowned for their excellent comprehensive performance.To optimize quality control of TiAlN coatings for cutting tools,a multi-scale simulation approach is proposed that encompasses the microstructure evolution of coatings considering the entire preparation and service lifecycle of PVD TiAlN coatings.This scheme employs phase-field simulation to capture the essential microstructure of the PVD-prepared TiAlN coatings.Moreover,cutting simulation is used to determine the service temperature experienced during cutting processes at varying rates.Cahn-Hilliard modeling is finally utilized to consume the microstructure and service condition data to acquaint the microstructure evolution of TiAlN coatings throughout the cutting processes.This methodology effectively establishes a correlation between service temperature and its impact on the microstructure evolution of TiAlN coatings.It is expected that the present multi-scale numerical simulation approach will provide innovative strategies for assisting property design and lifespan prediction of TiAlN coatings.展开更多
文摘现代金属切削加工正向着高速、高精度和高效的方向发展,对刀具的性能有着越来越高的要求。利用表面技术对刀具表面进行改性,是提高刀具性能和寿命的有效途径。使用多弧离子镀膜技术在YG6硬质合金以及三刃立铣刀表面制备了Cr Al N/CrN/Cr、TiAlN/CrN/Cr、Cr Al N/TiAlN/CrN/Cr三组涂层,并对三种涂层的制备技术、微观结构与性能差异、及耐磨与切削寿命提高机制进行研究。X射线衍射分析表明,三种涂层均为面心立方结构,其中TiAlN涂层表现出(200)晶面择优取向,而CrAlN和Cr Al N/TiAlN涂层则表现出(111)面的择优取向。使用显微硬度计和划痕仪对涂层的显微硬度和结合力进行测试,结果表明Cr Al N/TiAlN多层涂层的显微硬度和膜基结合力分别为2651 HV和59.2 N,显著高于TiAlN和CrAlN涂层。采用高温摩擦试验机评价了三种涂层的摩擦学性能,结果表明Cr Al N/TiAlN多涂层的摩擦性能优于TiAlN涂层和CrAlN涂层,室温下其平均摩擦因数和磨损率分别为0.603和2.92×10^(-6)mm^(3)(N·m)^(-1)。当温度增加到400℃时,Cr Al N/TiAlN涂层的平均摩擦因数进一步降低为0.467,磨损率增加至1.31×10^(-5)mm^(3)(N·m)^(-1)。铣削试验结果显示,TiAlN涂层刀具、CrAlN涂层刀具和Cr Al N/TiAlN涂层刀具的铣削寿命相对于无涂层刀具分别提升了80%、140%和200%,被加工样件的表面粗糙度分别降低至462 nm、415 nm和402 nm。研究结果表明Cr Al N/TiAlN涂层在现代切削加工领域有着良好的应用潜力。
基金support from Youth Fund of the National Natural Science Foundation of China(Grant No.52101028)China Postdoctoral Science Foundation(Grant No.2021M703628)Natural Science Foundation of Hunan Province(Grant No.2022JJ40629)is acknowledged.
文摘Physical Vapor Deposited(PVD)TiAlN coatings are extensively utilized as protective layers for cutting tools,renowned for their excellent comprehensive performance.To optimize quality control of TiAlN coatings for cutting tools,a multi-scale simulation approach is proposed that encompasses the microstructure evolution of coatings considering the entire preparation and service lifecycle of PVD TiAlN coatings.This scheme employs phase-field simulation to capture the essential microstructure of the PVD-prepared TiAlN coatings.Moreover,cutting simulation is used to determine the service temperature experienced during cutting processes at varying rates.Cahn-Hilliard modeling is finally utilized to consume the microstructure and service condition data to acquaint the microstructure evolution of TiAlN coatings throughout the cutting processes.This methodology effectively establishes a correlation between service temperature and its impact on the microstructure evolution of TiAlN coatings.It is expected that the present multi-scale numerical simulation approach will provide innovative strategies for assisting property design and lifespan prediction of TiAlN coatings.
