TiAlNbN hard coating and method for producing the same

The TiAlNbN coating with a gradient structure was prepared by using a multi-arc ion plating device, which solved the problem of insufficient oxidation resistance of TiAlN and CrAlN coatings under high temperature environment, and improved hardness and tribological properties, making it suitable for high-speed cutting.

CN122406155APending Publication Date: 2026-07-17NANCHANG WENTE PRECISION IND CO LTD +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
NANCHANG WENTE PRECISION IND CO LTD
Filing Date
2026-06-16
Publication Date
2026-07-17

AI Technical Summary

Technical Problem

Existing TiAlN and CrAlN coatings lack sufficient oxidation resistance and thermal stability at high temperatures, failing to meet the demands of modern high-speed machining.

Method used

A TiAlNbN hard coating with a gradient structure was formed using a multi-arc ion plating device. By controlling the negative bias voltage of the substrate and the process parameters, rare earth metal Nb was added to prepare the TiAlNbN coating.

Benefits of technology

It improves the coating's hardness, adhesion, tribological properties, and high-temperature oxidation resistance, while reducing the complexity and cost of the preparation process.

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Abstract

本发明公开了一种TiAlNbN硬质涂层及其制备方法，涉及硬质合金涂层技术领域，利用多弧离子镀设备提供控制基体负偏压线性增加形成梯度结构的TiAlNbN硬质涂层；所述梯度结构包括在基体上依序设置的Ti过渡层、TiAlN层以及TiAlNbN硬质涂层。与现有技术相比，本发明能够有效的降低制备TiAlNbN涂层的制造工艺的复杂性与成本性，获得性能更加优异的涂层，同时稀土金属Nb元素的添加可以阻碍柱状晶的生长，细化晶粒，增强涂层硬度，改善涂层的摩擦学性能。
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