Development of Ti-W-C-N System PVD Coated Tool

本研究开发了一种新型的PVD法制备的Ti-W-C-N系涂层。为了明确切削各种工件的有效刀具材料，对Ti-W-C-N涂层硬质合金刀具的刀具磨损进行了实验研究。基材为JIS K10硬质合金。正极材料为TiW。主要研究结果如下：1。TiN涂层的显微硬度HV_<0.25N>1940，临界划痕载荷为64N。偏置电压为-150V时（Ti，W）N涂层的显微硬度HV_<0.25N>1970，临界划痕载荷为148N.2。在SCr420H切削中，Ti-W-C-N涂层硬质合金是有效的刀具材料。在Ti-W- c -N包覆硬质合金刀具中，（Ti，W）N包覆硬质合金刀具在偏置电压-150V时的磨损过程最慢。在切削SUS304或SUS310S时，偏置电压为-300V时（Ti，W）N涂层硬质合金刀具的磨损进展最慢。在烧结钢的切削过程中，（Ti，W）N涂层与（Ti,Al）N涂层的磨损过程差别不大。在烧结不锈钢的切削加工中，（Ti，W）C涂层硬质合金刀具是（Ti，W）（C，N）涂层硬质合金中最有效的刀具材料。

Ti-W-C-N system coating films formed by PVD method, which are new type coating films, have been developed in this research. In order to clarify the effective tool material for the turning of various workpieces, the tool wear of the Ti-W-C-N system coated cemented carbide tools are experimentally investigated. The substrate used is cemented carbide JIS K10. The cathode material used is TiW.The main results obtained are as follows :1.The TiN coating layer has the micro-hardness of HV_<0.25N>1940 and the critical scratch load of 64N. The (Ti,W)N coating layer, which is the bias voltage -150V, has the micro-hardness of HV_<0.25N>1970 and the critical scratch load of 148N.2.In the cutting of SCr420H, the Ti-W-C-N coated cemented carbides are the effective tool materials. In the Ti-W-C-N coated cemented carbide tools, the wear progress of the (Ti,W)N coated cemented carbide tool, which is the bias voltage -150V, is slowest.3.In the cutting of SUS304 or SUS310S, the wear progress of the (Ti,W)N coated cemented carbide tool, which is the bias voltage -300V, is slowest.4.In the cutting of sintered steel, there was little difference between the wear progress of the (Ti,W)N coating film and the (Ti,Al)N coating film.5.In the cutting of sintered stainless steel, the (Ti,W)C coated cemented carbide tool is the most effective tool material in the (Ti,W)(C,N) coated cemented carbides.