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Coated cutting tool

A cutting tool and coating technology, applied in the field of coated cutting tools

Inactive Publication Date: 2011-05-18
SANDVIK INTELLECTUAL PROPERTY AB
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In some cases, the extended tool life may extend several times longer than that of uncoated cutting tools

Method used

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  • Coated cutting tool
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example 1

[0026] Using the RF sputtering PVD method, aperiodic stacked multilayers consisting of alternating metal oxide + metal oxide nanocomposite Al were deposited on the substrate 2 o 3 +ZrO 2 layer and Al 2 o 3 layer.

[0027] Through the high-purity oxide target, different process conditions are applied according to the temperature and the ratio of zirconia and alumina to deposit the nanocomposite layer. By applying one power level to the zirconia target and a separate power level to the alumina target, the content of both oxides in the nanocomposite layer formed was controlled. Alumina is added to a zirconia flux with the aim of forming a composite material with metastable ZrO 2 Mutually. For this example, the target power level on each oxide target was 80W. The sputtering speed was adjusted to obtain twice the at-% zirconium compared to aluminum. The oxygen:metal atomic ratio was 94% of the stoichiometric oxygen:metal atomic ratio.

[0028] Al was deposited using an alu...

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Abstract

The present invention relates to a cutting tool comprising a substrate of cemented carbide, cermet, ceramics, cubic boron nitride or high speed steel on which at least on the functioning parts of the surface thereof a thin, adherent, hard and wear resistant coating is applied, wherein said coating comprises a laminated multilayer of alternating PVD or PECVD metal oxide layers, Me1X+Me2X+Me1X+Me2X..., where the metal atoms Me1 and Me2 are one or more of Ti, Nb, V, Mo, Zr, Cr, Al, Hf, Ta, Y and Si, and where at least one of Me1X and Me2X is a metal oxide+metal oxide nano-composite layer composed of two components, component A and component B, with different composition and different structure, which components consist of a single phase oxide of one metal element or a solid solution of two or more metal oxides, wherein the layers Me1X and Me2X are different in composition or structure or both and have individual layer thicknesses larger than 0.4 nm but smaller than 50 nm, said laminated multilayer layer has a total thickness of between 0.2 and 20 mum and has a compositional gradient, with regards the concentration of one or more of the metal atom(s), in the direction from the outer surface of the coating towards the substrate, the gradient being such that the difference in between the average concentration of the outermost portion of the multilayer and the average concentration of the innermost portion of the multilayer is at least 5 at-% in absolute units.

Description

technical field [0001] The invention relates to a coated cutting tool for metalworking, which has a substrate of cemented carbide and on the surface of which substrate is deposited by physical vapor deposition (PVD) or plasma enhanced chemical vapor deposition (PECVD) Has a hard and wear-resistant refractory coating. Background technique [0002] The process of depositing thin ceramic coatings (1-20 microns) of materials such as aluminum, titanium carbide and / or titanium nitride onto, for example, cemented carbide cutting tools is a well known technique and when using coated cutting tools in metalworking , the tool life of such coated cutting tools has been considerably extended. In some cases, the extended service life of the tool may extend several times longer than that of a non-coated cutting tool. These ceramic coatings generally consist of a single layer, or a combination of multiple layers. Cutting tools currently commercially available are characterized by a combi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B32B33/00B32B9/00C23C14/06C23C16/30
CPCC23C30/005C23C28/00C23C14/00
Inventor 英丽德·赖内克玛丽安娜·科林戴维·于伊·特林汉斯·霍格贝里拉尔斯·胡尔特曼
Owner SANDVIK INTELLECTUAL PROPERTY AB