| 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 (Al x1 Me 1-x1 )N y1 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, Cr and W, and said layer B is (Zr 1-x2-z2 Si x2 Me2 z2 )N y2 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 Al, 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 µm and 15 µm. 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. |
