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High-hardness AlTiN/AlTiSiN multi-layer nano composite coating and preparation process thereof

A nanocomposite coating and preparation technology, which is applied in metal material coating technology, coating, ion implantation plating, etc., can solve the problems that cannot meet the requirements of high hardness, high toughness and wear resistance, and achieve high-temperature thermal Good stability and corrosion resistance, good wear resistance, high hardness and toughness

Inactive Publication Date: 2019-12-17
TIANJIN UNIV OF TECH & EDUCATION TEACHER DEV CENT OF CHINA VOCATIONAL TRAINING & GUIDANCE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the oxidation resistance of AlTiN coatings has been significantly improved compared with other binary coatings, it still cannot meet the requirements of high hardness, high toughness and wear resistance in some high-speed cutting or dry cutting environments.

Method used

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  • High-hardness AlTiN/AlTiSiN multi-layer nano composite coating and preparation process thereof
  • High-hardness AlTiN/AlTiSiN multi-layer nano composite coating and preparation process thereof
  • High-hardness AlTiN/AlTiSiN multi-layer nano composite coating and preparation process thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] In this embodiment, an AlTiN / AlTiSiN multilayer nanocomposite coating is deposited on a polished 304 stainless steel sheet, and the sample size is 25×30×1 mm.

[0038] The substrate is pretreated first: ultrasonic cleaning in acetone and alcohol for 15 minutes each, then blown dry with high-purity nitrogen, and then placed on the sample holder in the vacuum chamber.

[0039] The coating process was carried out on an AIP-650 arc ion coating machine, using pure metal Ti targets, alloy AlTi targets, and alloy AlTiSi targets (all with a purity of 99.9wt.%) with a diameter of 100 mm as the target materials, and the working gas and reaction gas were respectively Use high-purity argon and nitrogen.

[0040] The targets are evenly distributed on the inner wall of the furnace of the arc ion plating equipment to ensure a high plasma concentration in the furnace chamber during the deposition process; the pretreated substrate is placed on the central turret of the coating chamber; ...

Embodiment 2

[0052] In this embodiment, AlTiN / AlTiSiN multi-layer nanocomposite coating is deposited on a polished cemented carbide substrate, and the sample size is 25×30×3 mm.

[0053] The substrate is firstly pretreated: ultrasonically cleaned in acetone and alcohol for 15 mm each, then dried with high-purity nitrogen, and then placed on the sample holder in the vacuum chamber.

[0054] The coating process is carried out on an AIP-650 arc ion coating machine. The target material is a pure metal Ti target, an alloy AlTi target, and an AlTiSi alloy target (all with a purity of wt.99.9%) with a diameter of 100 mm. The working gas and reaction The gases are respectively high-purity argon and nitrogen.

[0055] Each target is evenly placed around the vacuum chamber of the arc ion plating equipment to ensure a high plasma concentration in the furnace chamber during the deposition process; the pretreated substrate is placed on the central turret of the coating chamber;

[0056] Use a mechanic...

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Abstract

The invention discloses a high-hardness AlTiN / AlTiSiN multi-layer nano composite coating and a preparation process thereof, and belong to the technical field of composite coating preparation. The AlTiN / AlTiSiN film multi-layer nano composite coating is formed by overlaying an AlTiN layer and an AlTiSiN layer in a mutual alternated mode, the coating modulation period is 150-1000 nm, and the periodnumber is larger than to equal to 2. The composite coating is prepared by adopting an electric arc ion plating technology, and the preparation process comprises the following steps that a metal Ti target, an AlTi target and an AlTiSi target are selected, after glow cleaning and bombarding cleaning, a TiN transition layer is firstly deposited, finally nitrogen is introduced as a reaction gas, and the AlTi target and the AlTiSi target are alternately opened to deposit the composite coating according to the set modulation period. The prepared coating by using the preparation process is compact inorganizational structure, strong in binding force between the coating and a base body, high in hardness and strength and good in wear resistance.

Description

technical field [0001] The invention relates to the technical field of composite coating preparation, in particular to a high-hardness AlTiN / AlTiSiN multilayer nanocomposite coating and a preparation process thereof. Background technique [0002] In recent years, the use of wear-resistant hard coatings on mechanical, forged and formed components has become increasingly important not only to save costs but also to increase the useful life of the material. AlTiN coating has been widely used in high-speed steel and cemented carbide tools because of its excellent high-temperature hardness and oxidation resistance, which is largely due to the increase of aluminum elements. Compared with the binary coating TiN, the AlTiN coating acts as a protective layer for the cutting tool, which can reduce the amount of wear and fracture caused by impact. Although the oxidation resistance of AlTiN coatings has been significantly improved compared with other binary coatings, it still cannot me...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C14/32C23C14/06C23C14/02
CPCC23C14/022C23C14/024C23C14/0641C23C14/325
Inventor 王铁钢侯翔刘艳梅阎兵范其香刘迁
Owner TIANJIN UNIV OF TECH & EDUCATION TEACHER DEV CENT OF CHINA VOCATIONAL TRAINING & GUIDANCE
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