METHOD FOR PROCESSING DIFFICULT-TO-CUT CAST IRON

摘要

A cutting tool (10) attached with a cutting tip (11) on the tip thereof is inserted into a pilot hole (21) on a workpiece (20) formed from a difficult-to-cut cast iron, thereby cutting the wall of the pilot hole (21). Specifically, the cutting tool (10) rotates about axis (a) and revolves about axis (ß), thereby contouring the workpiece (20). The cutting tip (11) is formed from a sinter, the CBN content of which is 85% by volume or more, and the thermal conductivity of the cutting tip (11) is 100W/(m·K) or more.