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Coated tool

A coating and cutting tool technology, applied in the field of cutting tools, can solve problems such as unstable deposition process and unfavorable hardness

Inactive Publication Date: 2013-01-16
WALTER AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As the layer thickness increases, the deposition process of the ions from the plasma becomes unstable, which manifests itself in particular at the corners and edges of the coated body, for example, and has a detrimental effect on the hardness of the layer

Method used

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  • Coated tool

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] In a PVD coating unit (Flexicoat; Hauzer Techno Coating), a hard metal substrate with two layers of PVD coating is provided. Before layers are deposited, the device is evacuated to 1 x 10 -5 mbar, and hard metal surfaces were cleaned by ion etching at a bias voltage of 170V.

[0043] Substrate composition:

[0044] 1) HM - fine particles + 10.5% by weight of Co

[0045] 2) HM-coarse particles + 10.5% by weight of Co + 1% by weight of MC

[0046] 3) HM-coarse particles + 11.0 wt% Co + 1 wt% MC

[0047] (explain:

[0048] HM-fine particle = WC hard metal, average particle size ~ 1μm

[0049] HM-coarse grain = WC hard metal, average grain size 3-5μm)

[0050] MC = mixed carbides (TiC, TaC...).

[0051] Substrate geometry: SEHW120408 (according to DIN-ISO 1832)

[0052] Deposition of layers:

[0053] The first layer: TiAlN

[0054] ·Arc deposition

[0055] · Target: Ti / Al (33 / 67 atomic%), circular source (diameter 63mm),

[0056] 80 Amps, 495°C, 3Pa N 2...

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Abstract

The invention concerns a cutting tool having a base body and a single-layer or multi-layer coating applied thereto. To provide cutting tools which are improved over the state of the art it is proposed according to the invention that the coating includes at least one two-phase or multi-phase layer which contains at least two different phases of metal oxide, wherein the at least one two-phase or multi-phase layer is electrically conductive.

Description

technical field [0001] The invention relates to cutting tools having a substrate and a single or multilayer coating applied thereto. Background technique [0002] Cutting tools comprise a base body made of, for example, hard or carbide metals, cermets, steel or high-speed steel. Usually, single or multi-layer coatings are applied on the substrate in order to increase the lifetime or also to improve the cutting properties. The single-layer or multi-layer coatings include, for example, hard metal material layers, oxide layers, and the like. The coating is applied using CVD process methods (chemical vapor deposition) and / or PVD process methods (physical vapor deposition). Multiple layers within a coating can be applied by only CVD processes, only by PVD processes, or by a combination of these processes. The CVD process provides a substantially stable phase of the desired compound, while the PVD process can also apply a metastable phase of the compound. [0003] For PVD proc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C30/00C23C28/00B22F7/00
CPCC23C14/024C23C14/345C23C30/005C23C14/0036C23C14/081B22F2005/001Y10T407/27Y10T428/265B23B27/14B23P15/28C23C14/14
Inventor 法伊特·席尔
Owner WALTER AG