AlCrTiSiN表面复合涂层对数控机床铣刀磨损性能的影响

Effect of AlCrTiSiN Surface Composite Coating on Wear Properties of Numerical Control Machine Tool Milling Cutter

在数控机床用W6Mo5Cr4V2铣刀表面沉积了3种不同组分的AlCrTiSi N涂层,对比分析了3种涂层的纳米硬度、弹性模量、摩擦系数、磨损率和切削寿命。结果表明,随着Al∶Cr原子比的减小,铣刀表面涂层的纳米硬度和弹性模量都表现为逐渐增加的趋势,涂层C的纳米硬度和弹性模量均最大;涂层A的摩擦系数相对较高,其次为涂层B,而涂层C的摩擦系数最低;涂层C具有较高的耐磨性能,其次为涂层B,而涂层A的耐磨性能相对较差;随着切削长度的增加,3种涂层刀具的后刀面磨损呈现逐渐升高的趋势,涂层C刀具的后刀面磨损最小;3种涂层刀具的磨损机制主要为粘着磨损和磨粒磨损,涂层C刀具的切削性能最好。

Three kinds of AlCrTiSiN coatings with different compositions were deposited on W6Mo5Cr4V2 alloy surface of numerical control machine tools, and the hardness, modulus of elasticity, friction coefficient, wear rate and cutting life of three coatings were investigated. The results show that with the decreases of Al：Cr atomic ratio, both the hardness and the elastic modulus of the coating on the SurfaCe of the milling cutter show a gradually increasing trend, and the maximum hardness and the modulus of elasticity of the coating C reach the maximum; the friction coefficient of A coating is relatively highest, B coating is higher, and C coating is the lowest. The coating C has highest wear resistance, coating B is middle, while the wear resistance of coating A is relatively poor; With increasing of cutting length, the flank wear of three coating tools is gradually increasing, and the flank wear of coated C cutters is the least; the main wear mechanisms of three coating tools are adhesive wear and abrasive wear, the cutting performance of coating C cutter is the best.