NANOLAMINATED COATED CUTTING TOOL

摘要

The present invention relates to a cutting tool insert machining by chip removal comprising a body of a hard alloy of cemented carbide, cermet, ceramics, cubic boron nitride based material or high speed steel, onto which a hard and wear resistant coating is deposited by physical vapor deposition (PVD) Said coating comprises at least one polycrystalline nanolaminated structure comprising sequences of alternating A and B layers, where said layer A is (A1x1Me1 1-x1)Ny1 with 0.3 < x1 < 0.95, 0.9 < y1 < 1.1 and Me1 is one or more of the elements Ti, Y, V, Nb, Mo, Si and W, or Me1 is Ti and one or more of the following elements Y, V, Nb, Mo, Si, Cr and W, and said layer B is (Zr1-x2-z2Six2Me2z2)Ny2 with 0 < x2 < 0.30, 0.90 < y2 < 1.20, 0 < z2 < 0.25 and Me2 is one or more of the elements Y, Ti, Nb, Ta, Cr, Mo, W and A1, the average individual thickness of A and B layers is between 1 nm and 50 nm, and the nanolaminated structure has a thickness between 0.5 mum and 15 mum. The invention also relates to a method for coating the insert and the use thereof. This insert shows improved tool life due to increased wear resistance and edge integrity in metal cutting applications at elevated temperatures.