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A kind of periodic multilayer structure altiyn/alcrsin hard coating and its preparation method and application

A hard coating, periodic technology, applied in coating, metal material coating process, vacuum evaporation coating and other directions, to achieve the effect of reducing brittleness, simple preparation method and improving mechanical properties

Active Publication Date: 2020-02-21
GUANGDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the tip temperature of modern high-speed and high-efficiency metal cutting is often above 1000°C. Coated tools need to serve for a long time under the coupling effect of impact load and high-temperature thermal corrosion. The oxidation resistance and cutting performance of traditional AlTiN single-layer coatings Not enough to withstand such severe working conditions

Method used

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  • A kind of periodic multilayer structure altiyn/alcrsin hard coating and its preparation method and application
  • A kind of periodic multilayer structure altiyn/alcrsin hard coating and its preparation method and application
  • A kind of periodic multilayer structure altiyn/alcrsin hard coating and its preparation method and application

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Effect test

Embodiment 1

[0029] A kind of periodic multilayer nanostructure AlTiYN / AlCrSiN hard coating, coating comprises cemented carbide substrate, AlTiYN transition layer and AlTiYN / AlCrSiN functional layer from bottom to top; 1~2:1 AlTiYN intermediate layer and AlCrSiN intermediate layer are alternately deposited, and the modulation period is 4~20nm; the atomic percentage content of each element in the AlTiYN transition layer is: Al: 20~28at.%, Ti: 18~22at .%, Y: 1~2at.%, N: 45~55at.%; the atomic percentage content of each element in the AlTiYN intermediate layer is: Al: 20~28at.%, Ti: 18~22at.%, Y: 1~ 2at.%, N: 45~55at.%; the atomic percentage content of each element in the AlCrSiN intermediate layer is: Al: 20~35at.%, Cr: 10~20at.%, Si: 3~10at.%, N: 40~53at.%.

[0030] Polish the substrate, ultrasonically clean it with acetone and alcohol for 10 minutes, dry it with general nitrogen, and put it into a vacuum chamber. Turn on the heater to raise the temperature to 500°C, and evacuate the vacuu...

Embodiment 2

[0035] A kind of periodic multilayer nanostructure AlTiYN / AlCrSiN hard coating, coating comprises cemented carbide substrate, AlTiYN transition layer and AlTiYN / AlCrSiN functional layer from bottom to top; 1~2:1 AlTiYN intermediate layer and AlCrSiN intermediate layer are alternately deposited, and the modulation period is 4~20nm; the atomic percentage content of each element in the AlTiYN transition layer is: Al: 20~28at.%, Ti: 18~22at .%, Y: 1~2at.%, N: 45~55at.%; the atomic percentage content of each element in the AlTiYN intermediate layer is: Al: 20~28at.%, Ti: 18~22at.%, Y: 1~ 2at.%, N: 45~55at.%; the atomic percentage content of each element in the AlCrSiN intermediate layer is: Al: 20~35at.%, Cr: 10~20at.%, Si: 3~10at.%, N: 40~53at.%.

[0036] Polish the substrate, ultrasonically clean it with acetone and alcohol for 10 minutes, dry it with general nitrogen, and put it into a vacuum chamber. Turn on the heater to raise the temperature to 500°C, and evacuate the vacuu...

Embodiment 3

[0039] A kind of periodic multilayer nanostructure AlTiYN / AlCrSiN hard coating, coating comprises cemented carbide substrate, AlTiYN transition layer and AlTiYN / AlCrSiN functional layer from bottom to top; 1~2:1 AlTiYN intermediate layer and AlCrSiN intermediate layer are alternately deposited, and the modulation period is 4~20nm; the atomic percentage content of each element in the AlTiYN transition layer is: Al: 20~28at.%, Ti: 18~22at .%, Y: 1~2at.%, N: 45~55at.%; the atomic percentage content of each element in the AlTiYN intermediate layer is: Al: 20~28at.%, Ti: 18~22at.%, Y: 1~ 2at.%, N: 45~55at.%; the atomic percentage content of each element in the AlCrSiN intermediate layer is: Al: 20~35at.%, Cr: 10~20at.%, Si: 3~10at.%, N: 40~53at.%.

[0040] Polish the substrate, ultrasonically clean it with acetone and alcohol for 10 minutes, dry it with general nitrogen, and put it into a vacuum chamber. Turn on the heater to raise the temperature to 500°C, and evacuate the vacuu...

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Abstract

The invention belongs to the field of material coatings, and discloses a periodic multilayer-structure AlTiYN / AlCrSiN hard coating as well as preparation method and application thereof. During preparation, a metal base body is activated firstly, and then an AlTiYN transition layer with the thickness of ~1 micro is deposited so as to provide the support for the multilayer structure; and finally, anAlTiYN / AlCrSiN functional layer is prepared by alternate deposition. In the multilayer structure, the AlCrSiN intermediate layer takes the AlTiYN intermediate layer as a template, and is expressed asa face-centered cubic structure through the co-lattice growth. The AlCrSiN coating is a of composite structure with the AlCrN nanocrystalline coated with the amorphous Si3N4. The strengthening effectand the amorphous part of the nanocrystal limit the slippage and rotation of crystal grains, so that the crystal boundary of the nanocrystalline is reinforced, meanwhile, the size of a columnar crystal is refined through the nano multilayer structure, and the mechanical property and the high-temperature stability of the coating are improved.

Description

technical field [0001] The invention belongs to the field of material coatings, in particular to a periodic multilayer nanostructure AlTiYN / AlCrSiN hard coating and its preparation method and application. Background technique [0002] AlTiN coatings are widely used in the field of cutting tools and molds due to their excellent mechanical properties and good anti-oxidation and anti-wear properties. However, the tip temperature of modern high-speed and high-efficiency metal cutting is often above 1000°C. Coated tools need to serve for a long time under the coupling effect of impact load and high-temperature thermal corrosion. The oxidation resistance and cutting performance of the traditional AlTiN single-layer coating It is not enough to withstand such severe working conditions. An appropriate amount of rare earth element Y is added to the transition metal nitride hard coating to prepare a multi-component solid solution structure coating, which can refine the coating grains ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C14/34C23C14/06C23C14/02
CPCC23C14/0036C23C14/022C23C14/0641C23C14/34
Inventor 王启民张权吴正涛刘喆人彭滨
Owner GUANGDONG UNIV OF TECH