Oxide coated cutting tool with increased wear resistance and method of manufacture thereof
First Claim
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1. A coated cutting tool body at least partially coated with one or more refractory layers of which at least one is alumina, said alumina layer having a coating thickness of 0.5-25 μ
- m and consisting essentially of single-phase κ
-Al2 O3 textured in the (210)-direction with a texture coefficient larger than 1.5, the texture coefficient being defined as below;
##EQU2## where I(hkl)=measured intensity of the (hkl) reflectionI0 (hkl)=standard intensity of the ASTM standard powder pattern diffraction data; and
n=number of reflections used in the calculation, (hkl) reflections used are;
(002), (112), (013), (122), (113), (032), (210), (222), (050).
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Abstract
An oxide coated cutting tool including a body coated with refractory single- or multilayers one of which consists of single-phase κ-Al2 O3 characterized by controlled microstructure with crystal planes preferably grown in the (210)-direction with respect to the exposed surface of the coated body. The oxide coated cutting tool exhibits increased wear properties when machining ball bearing steel.
28 Citations
20 Claims
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1. A coated cutting tool body at least partially coated with one or more refractory layers of which at least one is alumina, said alumina layer having a coating thickness of 0.5-25 μ
- m and consisting essentially of single-phase κ
-Al2 O3 textured in the (210)-direction with a texture coefficient larger than 1.5, the texture coefficient being defined as below;
##EQU2## where I(hkl)=measured intensity of the (hkl) reflectionI0 (hkl)=standard intensity of the ASTM standard powder pattern diffraction data; and n=number of reflections used in the calculation, (hkl) reflections used are;
(002), (112), (013), (122), (113), (032), (210), (222), (050). - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
- m and consisting essentially of single-phase κ
Specification