Vopát Tomáš, Sahul Martin, Haršáni Marián, Vortel Ondřej, Zlámal Tomáš
Faculty of Materials Science and Technology in Trnava, Institute of Production Technologies, Slovak University of Technology in Bratislava, Jána Bottu 25, 917 24 Trnava, Slovakia.
Faculty of Materials Science and Technology in Trnava, Institute of Material Science, Slovak University of Technology in Bratislava, Jána Bottu 25, 917 24 Trnava, Slovakia.
Micromachines (Basel). 2020 Feb 5;11(2):166. doi: 10.3390/mi11020166.
Nanocomposite AlCrSiN hard coatings were deposited on the cemented carbide substrates with a negative substrate bias voltage within the range of -80 to -120 V using the cathodic arc evaporation system. The effect of variation in the bias voltage on the coating-substrate adhesion and nanohardness was investigated. It was clear that if bias voltage increased, nanohardness increased in the range from -80 V to -120 V. The coating deposited at the bias voltage of -120 V had the highest nanohardness (37.7 ± 1.5 GPa). The samples were prepared by brushing and wet microblasting to finish a surface and prepare the required cutting edge radii for the tool life cutting tests and the coating adhesion observation. The indents after the static Mercedes indentation test were studied by scanning the electron microscope to evaluate the coating-substrate adhesion. The longer time of edge preparation with surface finishing led to a slight deterioration in the adhesion strength of the coating to the substrate. The tool wear of cemented carbide turning inserts was studied on the turning centre during the tool life cutting test. The tested workpiece material was austenitic stainless steel. The cemented carbide turning inserts with larger cutting edge radius were worn out faster during the machining. Meanwhile, the tool life increased when the cutting edge radius was smaller.
采用阴极电弧蒸发系统，在 -80 至 -120 V 的负衬底偏压范围内，将纳米复合 AlCrSiN 硬质涂层沉积在硬质合金基体上。研究了偏压变化对涂层与基体附着力和纳米硬度的影响。显然，在 -80 V 至 -120 V 范围内，随着偏压增加，纳米硬度增大。在 -120 V 偏压下沉积的涂层具有最高的纳米硬度（37.7 ± 1.5 GPa）。通过刷涂和湿式微喷砂制备样品，以完成表面处理，并为刀具寿命切削试验和涂层附着力观察制备所需的切削刃半径。通过扫描电子显微镜研究静态梅赛德斯压痕试验后的压痕，以评估涂层与基体的附着力。表面精加工的刃口制备时间越长，涂层与基体的附着强度略有下降。在车削中心对硬质合金车削刀片进行刀具寿命切削试验，研究其刀具磨损情况。试验工件材料为奥氏体不锈钢。切削刃半径较大的硬质合金车削刀片在加工过程中磨损更快。同时，切削刃半径较小时刀具寿命增加。
