TiCuN nano composite coating and preparation method thereof

A nanocomposite coating and transition layer technology, applied in the coating, metal material coating process, ion implantation plating, etc., to achieve the effects of improving hardness and fracture toughness, refining grain size, and reducing friction coefficient

Active Publication Date: 2013-06-19
沈阳金锋特种刀具有限公司
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Problems solved by technology

CNC tool surface coating technology, especially coated tools represented by TiN prepared by CVD and PVD, has been widely used in the process of improving the processing efficiency of various alloys, and subsequently developed TiC, TiCN, TiAlN, AlTiN , CrAlN and other coatings have been developed and applied in practice, but because of the oxidation of the coating by the high temperature during the cutting process, the adhesion and wear of the chip to the coating, and the brittleness of the coating itself, the processing problems of the above alloys have not been thoroughly solved. solve
For example, TiAlN coating has high hardness and good high-temperature oxidation resistance, which significantly improves the processing efficiency and tool life, but its high brittleness and friction coefficient limit the application of TiAlN and other coatings in high-speed, dry cutting and difficult cutting. The application of alloys and other materials also limits its practical application in high-precision molds and other wear-resistant and anti-friction workpiece coatings
[0003] How to further reduce the brittleness of TiAlN and other coatings, and break through the current problems of high internal stress in the coating and poor bonding force of the film base. Poor and falling off on the above-mentioned coating needs to continue to improve the target
[0004] In order to solve the above problems, the concept of nanocomposite coating was proposed at the end of the 20th century, that is, a two-phase or Composite structure of more than two phases, the composite coating has been developed and applied to a certain extent, such as Blazers, Platit and other international coating companies have developed nc-TiN / a-Si3N4 nanocomposite coating prepared by arc ion plating, its high temperature resistance Oxidation performance and toughness have been improved to some extent, but in practical applications, the high friction coefficient of nc-TiN / a-Si3N4 nanocomposite coatings leads to A large amount of heat is generated in the middle, and the built-up edge still occurs on the rake face of the coated tool, and its toughness still needs to be further improved

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  • TiCuN nano composite coating and preparation method thereof
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Experimental program
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Effect test

Embodiment 1

[0025] Plating transition layer: the substrate is made of high-speed steel (grade W18Cr4V), the size of the sample is 20mm×10mm×10mm, and the size of the coating surface is 20mm×10mm. The surface before coating is ground, polished, ultrasonically cleaned and dried, and then placed on the sample stage of the vacuum chamber until the vacuum degree in the vacuum chamber reaches 5×10 -3 At Pa, heat the vacuum chamber to 400oC, feed argon gas into the vacuum chamber, set the gas flow rate to 100sccm, control the air pressure at 2.0Pa, apply pulse negative bias voltage -800V to the substrate, and perform glow cleaning on the sample for 10 minutes; then , adjust the flow rate of argon gas to adjust the pressure of the vacuum chamber to 0.5Pa, and at the same time turn on the titanium-copper alloy target arc source, the arc flow is stable at 70A, and perform Ti on the sample + and Cu + Bombard for 5 minutes; adjust pulse negative bias to -300V, deposit TiCu film for 3 minutes;

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Embodiment 2

[0029] The substrate is made of cemented carbide (grade YG6), the size of the sample is 20mm×10mm×10mm, and the size of the coated surface is 20mm×10mm. The surface before coating is ground, polished, ultrasonically cleaned and dried, and then placed on the sample stage of the vacuum chamber until the vacuum degree in the vacuum chamber reaches 4×10 -3 At Pa, turn on the gas mass flow controller, pass argon gas to 1.0 Pa, apply pulse negative bias to -600V on the substrate, and perform glow cleaning on the sample for 8 minutes; then, adjust the flow rate of argon gas to adjust the pressure of the vacuum chamber to 0.6Pa, turn on the titanium-copper target arc source at the same time, the arc current is stable at 80A, and perform Ti on the sample + and Cu + Ion bombardment for 5 minutes; adjust the pulse negative bias to -400V, and deposit the TiCu metal layer for 3 minutes; after that, enter the deposition process of the TiCuN layer, first stop argon and feed nitrogen, adjust...

Embodiment 3

[0032] The substrate is made of high-speed steel (grade W6Mo5Cr4V2Al), the size of the sample is 20mm×10mm×10mm, and the size of the coated surface is 20mm×10mm. The surface before coating is ground, polished, ultrasonically cleaned and dried, and then placed on the sample stage of the vacuum chamber until the vacuum degree in the vacuum chamber reaches 3×10 -3 At Pa, pass argon gas to 1.0Pa, apply pulse negative bias to -500V on the substrate, and perform glow cleaning on the sample for 5 minutes; then, adjust the Ar gas flow rate to adjust the vacuum chamber pressure to 0.3Pa, and open the titanium copper target at the same time Arc source, the arc current is stable at 80A, Ti + and Cu + Ion bombardment for 4 minutes; adjust the pulse negative bias to -500V, and deposit the TiCu metal layer for 3 minutes; after that, enter the deposition process of the TiCuN layer, first stop argon and feed nitrogen, adjust the air pressure to 0.4Pa; adjust the substrate pulse negative bias...

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Abstract

The invention belongs to the technical field of superhard nano composite coatings deposited on the surface of a metal material, particularly relates to a TiCuN nano composite coating and a preparation method thereof and aims to solve the technical problems that the high friction coefficient of a nc-TiN / a-Si3N4 nano composite coating causes the generation of a large amount of heat in the cutting process and the front tool face of a coated cutter can still produce built-up edges. The invention is characterized in that the surface of a substrate is sequentially composed of a transition layer formed by a TiCu film and a TiCuN layer, and the preparation method is implemented through an arc ion plating technology. The nano composite coating prepared by the method has high hardness and has the advantages of high coating toughness, high film / substrate adhesion strength, low friction coefficient and the like.

Description

Technical field: [0001] The invention belongs to the technical field of nanocomposite coatings deposited on the surface of metal materials, and in particular relates to a titanium copper nitride (hereinafter referred to as TiCuN) nanocomposite coating and a preparation method thereof. Background technique: [0002] At present, with the development of national advanced manufacturing technology, higher and higher requirements are put forward for traditional carbide or high-speed steel cutting tools. Machining technology represented by CNC machine tools is developing in the direction of high speed, high precision and high reliability. CNC tool surface coating technology, especially coated tools represented by TiN prepared by CVD and PVD, has been widely used in the process of improving the processing efficiency of various alloys, and subsequently developed TiC, TiCN, TiAlN, AlTiN , CrAlN and other coatings have been developed and applied in practice, but because of the oxida...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C14/06C23C14/38
Inventor 赵彦辉于宝海于传跃赵鹏
Owner 沈阳金锋特种刀具有限公司
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