Tool Wear of Coated Tools when Machining a High Nickel Alloy

Summary A high nickel alloy is well known as a difficult-to-machine material. A tool injury occurs severely in cutting of this material, especially in screw thread turning. Then, in this paper, four representative coated tools were used in turning of a high nickel alloy and the tool wear was investigated in detail. The main results obtained are as follows: In using coated tools, the flank groove wear is reduced and the tool life is decided by the boundary wear instead of the flank groove wear. An Al 2 O 3 coated tool is effective for the boundary wear. A TiC/Al 2 O 3 coated tool on the cemented carbide K10 has the least groove wear among the coated tools on the four kinds of cemented carbide.