PVD涂层铣刀的制备及其磨损研究

Study on Fabrication of PVD Coated Milling Cutter and Its Wear

采用物理气相沉积(PVD)对硬质合金立铣刀进行涂层处理,并对钛合金进行铣削测试。研究TiSiN和ZrAlN两种不同类型PVD涂层硬质合金铣刀的磨损情况以及钛合金铣削表面粗糙度和表面形貌。磨损实验结果表明:当主轴转速N、铣削深度a_(p)、铣削宽度a_(e)、进给速度v_(f)分别为8000r/min,2mm,0.30mm,1200mm/min时,无涂层、TiSiN涂层、ZrAlN涂层三种硬质合金铣刀的第一后刀面磨损量分别达到133μm,61μm,33μm。钛合金铣削实验结果表明:当铣削参数为主轴转速8000r/min、铣削深度0.1mm、铣削宽度0.05mm和进给速度800 mm/min时,无涂层、TiSiN涂层、ZrAlN涂层三种硬质合金铣刀获得的钛合金铣削表面粗糙度分别为0.35μm,0.40μm,0.38μm。ZrAlN涂层可以明显抑制钛合金切削过程中的黏刀现象,降低黏着磨损情况,有效提高硬质合金铣刀的切削性能。

The carbide end mill coated by physical vapor deposition(PVD)is employed to cut titanium alloy in this paper.The wear of TiSiN and ZrAlN PVD coated carbide milling cutters and the machined surface roughness and morphology of titanium alloy by milling are studied.The wear experimental results show that when the spindle speed N,milling depth a_(p),milling width a_(e) and feed speed v_(f) are 8000r/min,2mm,0.30mm and 1200mm/min,respectively,the wear amount of the first back face of uncoated,TiSiN coated and ZrAlN coated carbide milling cutters are 133μm,61μm and 33μm respectively.The milling experimental results of titanium alloy show that when the milling parameters including spindle speed,milling depth,milling width and feed speed are 8000r/min,0.1mm,0.05mm and 800mm/min,the machined surface roughness of titanium alloy obtained by uncoated,TiSiN coated and ZrAlN coated carbide milling cutters are 0.35μm,0.40μm and 0.38μm,respectively.ZrAlN coating can significantly reduce the adhesion wear in the cutting process of titanium alloy,and effectively improve the cutting performance of cemented carbide milling cutter.