FACE MILLING TOOL DISPLAYING EXCELLENT WEAR RESISTANCE WITHOUT DETERIORATING CUT SURFACE ROUGHNESS IN HIGH FEED CUTTING

摘要

PROBLEM TO BE SOLVED: To provide a face milling tool displaying excellent wear resistance without deteriorating cut surface roughness in high feed cutting. ;SOLUTION: In this face milling tool formed by removably mounting a plurality of milling coated chips in the front surface of a cutter, a cermet base material in the milling coated chip constituted of the cermet base material and a hard coating layer evaporated by 0.5 to 20 μm mean layer thickness on a surface of this cermet base material is constituted by carbon nitride titanium-based cermet having an organization with a hard phase occupying 75 to 95 area % and the rest of inevitable impurities by microscope observation. The hard phase has a cored structure formed of compound carbon nitride with a core part and peripheral part substantially Ti and M (M is one or two kinds or more of Ta, Nb, V, W and Zr). A connection phase is formed of a Co-Ni-W-based alloy containing 15 to 35% W, 10 to 35% Ni, and 35 to 70% Co by weight ratio occupied in the connection phase (W+Ni+Co=90% or more), further a honing amount formed in a main cutting edge and flat drag of the milling coated chip is 0.10 to 0.25 mm for main cutting edge and 0.02 to 0.08 mm for flat drag.;COPYRIGHT: (C)2000,JPO