Alcrnbsitibc high-temperature self-lubricating composite coating for cemented carbide milling cutter and preparation method thereof

A high-temperature self-lubricating and self-lubricating coating technology, applied in metal material coating process, coating, vacuum evaporation plating and other directions, can solve the problems of temperature difference, high temperature, failure, etc. The effect of avoiding the sticking knife problem

Active Publication Date: 2020-11-17
WUHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the process of cutting aluminum alloy, the tip of the tool often leads to high temperature. The maximum working temperature of conventional diamond-like coatings and other lubricating materials is only 400°C, which often leads to failure due to poor temperature resistance. Therefore, the new high-temperature self-lubricating coating The development of

Method used

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  • Alcrnbsitibc high-temperature self-lubricating composite coating for cemented carbide milling cutter and preparation method thereof
  • Alcrnbsitibc high-temperature self-lubricating composite coating for cemented carbide milling cutter and preparation method thereof
  • Alcrnbsitibc high-temperature self-lubricating composite coating for cemented carbide milling cutter and preparation method thereof

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preparation example Construction

[0028] A preparation method for a self-lubricating coating of a cemented carbide milling cutter, comprising the following steps:

[0029] Step 1. Prepare the arc ion plating device, place the formed milling cutter on the workpiece frame in the vacuum chamber of the arc ion plating device, and clean the milling cutter by ion etching, so that the surface of the milling cutter meets the coating requirements; The etching process is: plasma etching the milling cutter at 300-500°C in an argon and hydrogen environment.

[0030] Step 2. Introducing nitrogen gas, opening the AlCr target, and depositing an AlCrN film on the surface of the milling cutter by arc ion plating technology as a bonding layer; the bonding layer is an AlCrN film of 400-1200 nanometers deposited under the conditions of 2.5-5Pa, 50-200V.

[0031] Step 3. Gradually open the AlCrNbSiTiB target and rotate the milling cutter continuously to form an AlCrN / AlCrNbSiTiBN superhard high-entropy alloy nano-multilayer film o...

Embodiment 1

[0034] Embodiment 1: Carbide milling cutter is subjected to plasma etching at 300° C. in argon and hydrogen atmosphere. After the etching is finished, a 400nm AlCrN film is deposited as a bonding layer under the conditions of 2.5Pa and 50V. Then deposit 500 nanometers of AlCrN / AlCrNbSiTiBN superhard high-entropy alloy nano-multilayer film under 2Pa, 50V conditions as the hardening layer, the thickness of the AlCrN monolayer in the hardening layer is 5 nanometers, the thickness of the AlCrNbSiTiBN monolayer is 5 nanometers, and the modulation period to 10 nm. Finally, a 300nm AlCrNbSiTiBC film was deposited as a high-temperature self-lubricating layer under the conditions of 2Pa and 50V. The total thickness of the self-lubricating coating is controlled at 1.2 microns. Cool naturally after preparation to obtain a cemented carbide milling cutter with AlCrNbSiTiBC high-temperature self-lubricating composite coating.

Embodiment 2

[0035] Embodiment 2: At 500° C. in an argon and hydrogen atmosphere, plasma etching is performed on a cemented carbide milling cutter. After the etching is finished, a 1200nm AlCrN film is deposited as a bonding layer under the conditions of 5Pa and 200V. Then deposit 1000 nanometers of AlCrN / AlCrNbSiTiBN superhard high-entropy alloy nano-multilayer film under the condition of 5Pa and 250V as the hardening layer. The thickness of the single layer of AlCrN in the hardened layer is 20 nanometers, the thickness of the single layer of AlCrNbSiTiBN is 30 nanometers, and the modulation period is 50 nanometers. Finally, a 1000nm AlCrNbSiTiBC film was deposited as a high-temperature self-lubricating layer under the conditions of 5Pa and 150V. The total thickness of the self-lubricating coating is controlled at 3.2 microns. Cool naturally after preparation to obtain a cemented carbide milling cutter with AlCrNbSiTiBC high-temperature self-lubricating composite coating.

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Abstract

The invention discloses an AlCrNbSiTiBC high temperature self-lubrication composite coating of a carbide milling-tool and a preparation method thereof. The self-lubrication coating adopts a gradient layer structure and is composed of a bonding layer, a hardening layer and a high temperature self-lubrication layer. The preparation method comprises the following steps: carrying out ion etching on the carbide milling-tool after chemical cleaning, then, adopting the arc ion plating method to deposit a pure AlCrN film as the bonding layer, soon afterwards, on the basis of the bonding layer, preparing an AlCrN / AlCrNbSiTiBN superhard high-entropy alloy nano-multilayer film hardening layer, and finally, on the basis of the hardening layer, preparing an AlCrNbSiTiBC high temperature self-lubrication layer. The coating is combination of multiple alloy coating materials in term of structure, has the gradual change characteristic in term of composition and has the gradient structure in term of hardness, so that the internal stress of the coating can be greatly reduced and the toughness of the coating can be improved, the defects that the wear resistance and the pick resistance of the cementedcarbide processing cutter coating for aluminium alloy are insufficient are better overcome, and the service life and the adaptability of the aluminium alloy processing milling-tool are greatly prolonged and improved.

Description

technical field [0001] The invention belongs to the technical field of thin film materials, and relates to a coating for milling cutter equipment, in particular to an AlCrNbSiTiBC high-temperature self-lubricating composite coating for a cemented carbide milling cutter and a preparation method thereof. Background technique [0002] Aluminum alloy is the most widely used non-ferrous metal structural material in the industry. It has been widely used in aerospace, automotive industry, mechanical structural parts and 3C electronics industry. According to the processing method, it can be divided into two types: deformed aluminum alloy and cast aluminum alloy. category. Aluminum material is soft, but relatively sticky, and built-up edge is easily generated during cutting, which leads to rapid wear of the tool. Therefore, machining aluminum alloy generally requires the tool to have a low coefficient of friction to reduce the generation of built-up edge. At present, the available t...

Claims

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Application Information

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Patent Type & AuthorityPatents(China)
IPC IPC(8): C23C14/32C23C14/06C23C14/02
CPCC23C14/0021C23C14/022C23C14/06C23C14/0641C23C14/325
Inventor杨兵李敬雨刘琰陈燕鸣郭嘉琳李正刚
OwnerWUHAN UNIV