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A method of producing a coated cutting tool and a coated cutting tool

A cutting tool, coating technology, applied in the direction of manufacturing tools, tools for lathes, metal material coating processes, etc., can solve problems such as short tool life and adhesion

Active Publication Date: 2022-06-03
WALTER AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, adhesion problems may occur between the metal nitride layer and the oxide layer, resulting in a shorter tool life

Method used

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  • A method of producing a coated cutting tool and a coated cutting tool

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Embodiment 1

[0085] Embodiment 1 (the present invention):

[0086] A cemented carbide solid end mill green body was provided with a composition of 10 wt % Co, 0.4 wt % Cr and the balance WC.

[0087] The WC grain size determined by the coercive force was 0.5 μm.

[0088] Sample 1:

[0089] The (Ti,Al)N layer was deposited by HIPIMS using continuous power pulses as provided according to the specification of US2014 / 0339917A1. Use the following machining parameters / conditions:

[0090] Total pressure: 0.60Pa

[0091] Ar-pressure: 0.43Pa

[0092] N 2 -Pressure: 0.17Pa

[0093] Substrate temperature: 430℃

[0094] Bias: -40V DC

[0095] Bias current: -4.1A

[0096] Power: in 3×Ti 40 Al 60 27.8kW on target

[0097] Target diameter: 160mm

[0098] Average power density: 46.1Wcm -2

[0099] Pulse on time: 7.56ms

[0100] Pulse frequency: 20Hz

[0101] Deposition time: 180 minutes

[0102] The layer thickness was measured to be 2.8 μm. The hardness of the deposited (Ti,Al)N layer...

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Abstract

The invention relates to a method of producing a coated cutting tool, said method comprising the steps of depositing a 0.5-10 μm nitride layer on a substrate, subsequently depositing Al or Al+Me, further subsequently depositing a 0.1-5 μm oxide layer, the nitride layer is one or more nitrides of Ti, Zr, Hf, V, Ta, Nb, Si, Cr and Al, and the oxide layer is (Al a Me 1‑a ) 2 o 3 layer, 0.05≤a≤1, Me is one or more of Ti, Mg, Ag, Zr, Si, V, Fe, Hf, B and Cr, and the layer is deposited by magnetron sputtering. The present invention also relates to a coated cutting tool comprising a substrate having a coating comprising said nitride layer and an oxide layer, said coating having in said oxide layer (Al, Me, O) inclusions at the interface of the nitride layer and the oxide layer, and / or with (Al, Me, O) between the nitride layer and the oxide layer O) layer.

Description

technical field [0001] The present invention relates to a method of producing a coated cutting tool having a coating comprising a metal nitride and an aluminium-containing oxide. The invention also relates to a coated cutting tool. Background technique [0002] There is a continuing desire to improve cutting tools for metalworking to make them last longer, withstand higher cutting speeds and / or other increasingly demanding cutting operations. Typically, cutting tools for metalworking contain a hard substrate material such as cemented carbide with a thin hard coating, typically deposited by chemical vapor deposition (CVD) or physical vapor deposition (PVD). [0003] The coatings typically comprise a combination of two or more monolayers of different chemical compositions. In addition to the importance of adhesion between the innermost layer of the coating and the substrate material, another important factor affecting tool life is the adhesion between the individual layers w...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C28/04C23C14/08C23C14/06C23C14/34C23C14/18C23C28/00
CPCC23C14/0641C23C14/08C23C14/185C23C14/3485C23C28/34C23C28/321C23C28/345C23C28/347C23C14/354C23C14/0617C23C14/35B23B2228/10
Inventor 法伊特·席尔多米尼克·迪赫勒
Owner WALTER AG
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