Experiment investigation of superfine deep hole drilling mechanism for high temperature alloy 718

In this paper, the physical properties of high temperature alloy 718, the cutting machinability as well as the characteristics of deep hole drilling were discussed. Superfine deep hole drilling experiments for this alloy were performed with different drilling technological parameters. Tools made of different raw materials with different angles were discussed. Chips were removed from the inner side of the tagger tooth. The morphologies of drilling chip and disabled tool, as well as their formation mechanisms, were analysed. Identified from the wear and breakage of the tools, as well as the chip morphology, the optical tool material is YG813 for the superfine deep hole drilling of high temperature alloy 718, and the reasonable drilling parameters are explored. In addition, wear and breakage of the tool in the drilling process are extremely serious, and the mechanism of tool wear is mainly adhesive and abrasive wear. The ideal morphology of chips is in short conical spiral shape.