| 摘要 |
A cutting tool insert includes a body of a hard alloy of cemented carbide, cermet, ceramics, cubic boron nitride based material or high speed steel a hard and wear resistant coating, including one or several layers, at least one of which is an (Al,Cr)2O3 layer. The tool is particularly useful for machining steel and stainless steel. The coating, with a total thickness of 2-20 μm includes one or several layers, at least one of which is an (Al,Cr)2O3 layer with a thickness of 1-5 μm having a corundum phase crystalline structure and a composition (Al1-yCry)2O3 with 0.5≦̸y≦̸0.7. The (Al,Cr)2O3 layer has a fiber texture with rotational symmetry in the direction of the coated surface normal with an inclination angle, &phgr;, of the basal planes relative to the coated surface normal or the inclination angle, &phgr;, for the highest peak in the pole plot with 20°<&phgr;<55°.
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