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A kind of multi-layer nano-composite tool coating and preparation method thereof

A nano-composite and cutting tool technology, applied in coating, metal material coating process, ion implantation plating, etc., can solve the problems of poor oxidation resistance, low temperature resistance, high friction coefficient, etc., to reduce internal stress and improve toughness And the effect of cohesion, life improvement

Active Publication Date: 2017-05-17
LINGNAN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to overcome the defects of high friction coefficient, poor oxidation resistance and low temperature resistance existing in the existing coating tools, and provide a multi-layer nano-composite tool coating, which has high hardness , low coefficient of friction, high bonding strength, good high temperature stability, and it is higher than 1000 o C still has excellent antioxidant properties

Method used

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  • A kind of multi-layer nano-composite tool coating and preparation method thereof
  • A kind of multi-layer nano-composite tool coating and preparation method thereof
  • A kind of multi-layer nano-composite tool coating and preparation method thereof

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Effect test

Embodiment 1

[0037] After cleaning and drying the cemented carbide integral cylindrical milling cutter, put it into the vacuum chamber, when the background vacuum degree of the vacuum chamber is 5´10 -3 Pa, pass Ar gas and control the air pressure at 6´10 -2 Pa, the substrate temperature was 400°C, the negative bias was -900 V, the ion source voltage of the anode layer was turned on at 800 V, the current intensity was 5 A, and the bombardment time was 20 min. After glow cleaning, adjust the vacuum to 0.9Pa, turn on the arc ion plating metal Ti target, keep the bias voltage at -600V, and bombard the substrate for 10 minutes to obtain a Ti metal bonding layer with a thickness of 110nm; turn on the Ti metal target, Zr metal target and TiSi alloy target, control arc voltage 25V, arc current 60A; at the same time open medium frequency magnetron sputtering Al target, control target current at 13A, voltage 350V, duty cycle 60%; adjust and control Ar gas, C 2 h 2 , N 2 Gas is introduced, the ga...

Embodiment 2

[0039] After cleaning and drying the cemented carbide integral cylindrical milling cutter, put it into the vacuum chamber, when the background vacuum degree of the vacuum chamber is 3´10 -3 When Pa, pass Ar gas and control the air pressure at 4´10 -2 Pa, the substrate temperature was 450°C, the negative bias was -900 V, the ion source voltage of the anode layer was turned on at 830 V, the current intensity was 3.2 A, and the bombardment time was 20 min. After glow cleaning, the vacuum was adjusted to 0.9 Pa, the arc ion plating metal Ti target was turned on, the bias voltage was kept at -700V, and the substrate was bombarded for 28 minutes to obtain a Ti metal bonding layer with a thickness of 150nm; after the bombardment was completed, the bias voltage dropped to -150V, duty cycle 40%, pass into N 2 , control the air pressure at 0.8Pa, keep the substrate temperature at 360°C, arc voltage at 20V, and arc current at 120A. At the same time, turn on the medium frequency magnetro...

Embodiment 3

[0042] After cleaning and drying the cemented carbide three-dimensional milling cutter, put it into the vacuum chamber. When the background vacuum degree of the vacuum chamber is 3´10 -3 When Pa, pass Ar gas and control the air pressure at 4´10 -2 Pa, the substrate temperature was 420°C, the negative bias was -900 V, the ion source voltage of the anode layer was turned on at 880 V, the current intensity was 3.4 A, and the bombardment time was 18 min. After glow cleaning, the vacuum was adjusted to 0.8 Pa, the arc ion plating metal Ti target was turned on, the bias voltage was kept at -680V, ​​and the substrate was bombarded for 15 minutes to obtain a Ti metal bonding layer with a thickness of 120nm. After the bombardment is completed, the bias voltage drops to -150V, the duty cycle is 30%, and the N 2 , control the air pressure at 0.7Pa, keep the substrate temperature at 340°C, arc voltage at 28V, and arc current at 70A. At the same time, turn on the intermediate frequency ma...

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Abstract

The present invention belongs to the technical field of coatings, and specifically discloses a multilayer nanometer composite cutter coating and a preparation method thereof. The coating comprises a Ti metal bonding layer, a TiZrAlSiCN main action layer and a Al2O3 surface anti-oxidation layer, wherein the Ti metal bonding layer, the TiZrAlSiCN main action layer and the Al2O3 surface anti-oxidation layer are sequentially deposited on the surface of the cutter body from inside to outside, the TiZrAlSiCN main action layer is a nanometer composite structure and has characteristics of binding force exceeding 70 N, hardness of 45 GPa and low friction coefficient achieving 0.3, and the anti-oxidation capability of the coating is further improved through the Al2O3 surface anti-oxidation layer. The cutting experiment results show that the cutter containing the costing has the substantially improved service life and has important applications in high-speed milling machining of difficultly-machined materials.

Description

technical field [0001] The invention relates to the technical field of coatings, in particular to a multilayer nanocomposite tool coating and a preparation method thereof. Background technique [0002] With the sharp increase in the use of difficult-to-machine materials such as high-strength steel, high-temperature alloys, and high-strength composite materials, and the extensive use of high-speed cutting, dry cutting, and micro-lubricated cutting processes, higher requirements are placed on cutting tools. The emergence of coated tools has made a major breakthrough in the cutting performance of the tool. It combines the tool matrix with the hard film surface. Because the matrix maintains good toughness and high strength, the hard film surface has high wear resistance. The characteristics of high performance and low friction coefficient greatly improve the performance of the tool. Nano-composite structure coating is a representative of a new generation of high-speed cutting c...

Claims

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Application Information

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IPC IPC(8): C23C14/35C23C14/06C23C14/08
Inventor 邹长伟邵乐喜谢伟
Owner LINGNAN NORMAL UNIV
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