Abstract
In MQL finish–turning of a nickel base superalloy, Inconel 718, with a PVD coated carbide tool with a superlattice coating of TiN/AlN at a cutting speed of 1.5m/s, we examined the supply method of oil–mist to the cutting point for extension of tool life. From experimental result, it is important that blowing point is set as near position from the cutting edge as possible. In the case that oil–mist is blown from the position from the cutting point to 1.6mm, cutting performance of MQL cutting about tool life is maintainable despite a low amount of oil supply of 0.2ml/h.
