PROPERTIES AND CUTTING PERFORMANCE OF TiAlSiN COATING PREPARED BY CATHODE ARC ION PLATING

摘要

TiAlSiN coating was deposited on high-speed steel (HSS) samples and cemented carbide tool inserts, respectively, by a new coating preparation procedure, and its properties and cutting performance were characterized. The coating thickness, chemical composition, microstructure morphology and mechanical properties were investigated by X-ray fluorescence measurement system, energy dispersive spectrometer (EDS), scanning electron microscope (SEM), nanoindentation, Rockwell hardness tester and ball-on-disc tribometer. A 3D orthogonal cutting experiment model was established by DEFORM-3D to study the influences of different coating thicknesses on cutting force and temperature, and the field cutting experiment was carried out. The results show that the thickness of TiAlSiN coating is 3.14 mu m prepared by the 3 mu m preparation procedure, microhardness is 36.727 GPa with the Si content of about 5.22 at.% as well as good fracture toughness and adhesion strength. The TC4 and AISI 1045 cutting tool inserts with 4 mu m coating thickness have the minimum cutting forces of about 734.7N and 450.7 N, respectively. Besides, tool inserts with a thickness of 3 mu m have the minimum cutting temperatures of about 510.2 degrees C and 230.6 degrees C, respectively.