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US 7,989,060 B2Granted
Oxide coated cutting insert
AssigneeSeco Tools AB
InventorsTommy Larsson, Mats Johansson
Life of this patent
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Abstract
A cutting tool insert, particularly useful for machining of steel and stainless steel, comprising 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; and at least (Al,Cr)2O3 layer applied to said body is disclosed. Methods of making a cutting tool insert are also disclosed. In addition, methods for machining of cast iron using the cutting tool inserts are disclosed.
Claims19
A cutting tool insert, comprising:
- a body comprising a hard alloy selected from the group consisting of cemented carbide, cermet, ceramics, cubic boron nitride based material, and high speed steel;
- and
- a hard and wear resistant coating applied on said body;
- wherein said coating comprises at least one (Al,Cr)2O3 layer;
- wherein said (Al,Cr)2O3 layer has a corundum phase crystalline structure and a structure and a composition (Al1-yCry)2O3 with about 0.5≦y≦about 0.7 with a thickness of about 0.5 μm to about 10 μm and a fiber texture, rotational symmetry, in the direction of the coated surface normal with an inclination angle, φ, of the basal planes relative to the coated surface normal is about 0°<φ<about 20° or the inclination angle, φ, for the highest peak in the pole plot is about 0°<φ<about 20°.
2 more elements
A cutting tool insert, comprising:
- a body comprising a hard alloy selected from the group consisting of cemented carbide, cermet, ceramics, cubic boron nitride based material, and high speed steel;
- and
- a bonding layer, a hard and wear resistant (Al,Cr)2O3 layer and a top coating consecutively applied on said body;
- wherein said (Al,Cr)2O3 layer has a corundum phase crystalline structure and a structure and a composition (Al1-yCry)2O3 with about 0.5≦y≦about 0.7 with a thickness of about 0.5 μm to about 10 μm and a fiber texture, rotational symmetry, in a direction of the coated surface normal with an inclination angle, φ, of basal planes relative to a coated surface normal is about 0°<φ<about 20° or the inclination angle, φ, for a highest peak in a pole plot is about 0°<φ<about 20°.
1 more element
Dependencies are inferred from the claim text.