Superlubricity multilayer nano composite coating and preparation method thereof

A composite coating and nano-composite technology, applied in coatings, chemical instruments and methods, metal material coating processes, etc., can solve the problems of inability to achieve cutting processing, short service life, etc., to improve tool life and improve bonding strength. and toughness, reducing abrasive wear

Active Publication Date: 2015-08-19
LINGNAN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The multi-layer or gradient coating design can improve the bonding force between the coating and the substrate, the toughness of the coating and the ability to resist crack growth, and realize the composite functions of each layer. The Chinese patent No. 201110176393.8 discloses a periodic Coated composite coating tools, the composite coating includes a TiAlN base layer on the bottom layer and a periodic coating on the surface layer, and the periodic coating is based on a cycle of "TiSiN layer to TiAlSiN layer to TiAlN layer" Multi-period coating, the periodic coating relieves the internal stress of the coating, prevents cracks from expanding, and keeps the composite coating at high hardness, excellent high-temperature oxidation resistance and high-temperature stability, but the friction coefficient of the prop coating is not enough Reach aluminum alloy and high-hardness steel material cutting under high-speed conditions, and the service life is short

Method used

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  • Superlubricity multilayer nano composite coating and preparation method thereof
  • Superlubricity multilayer nano composite coating and preparation method thereof
  • Superlubricity multilayer nano composite coating and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0040] Clean the keyway milling cutter and clean it with N 2 Put it on the substrate holder of the sample after blowing dry, when the background vacuum degree of the vacuum chamber is 5'10 -4 Pa, feed Ar gas and control the air pressure at 4'10 -2 Pa, the substrate temperature is 400 °C, the anode layer ion source is turned on, the voltage is 1200 V, the current is 3 A, the substrate holder rotates at 3 rpm, the negative bias is -900 V, and the bombardment time is 30 min. After glow cleaning, adjust the vacuum to 0.8 Pa, turn on the arc ion plating metal Cr target, bombard the substrate for 20 min, keep the bias voltage at -900V, turn on the anode layer ion source, adjust the voltage at 800 V, and obtain the Cr metal The interface bonding layer has a thickness of 120nm. After the deposition of the Cr binding layer on the metal surface is completed, the bias voltage is reduced to -150V, and the N 2 , control the air pressure at 0.9 Pa, keep the substrate temperature at 300°C...

Embodiment 2

[0043] Clean the solid carbide keyway milling cutter with acetone, with N 2 After drying, place it on the substrate holder in the cavity. When the background vacuum degree of the vacuum chamber is 3'10 -3 Pa, through the Ar gas and control the air pressure at 6'10 -2 Pa, the substrate temperature is 300°C, the ion source voltage of the anode layer is turned on at 1200V, the current is 3A, the rotation speed of the substrate holder is 3 rpm, the negative bias voltage is -1000 V, and the bombardment time is 30 min. After glow cleaning, adjust the vacuum to 0.5 Pa, turn on the arc ion plating metal Cr target, bombard the substrate for 25 minutes, keep the bias voltage at -800V, turn on the ion source of the anode layer, adjust the voltage at 800 V, and obtain the Cr metal The interface bonding layer has a thickness of 120nm. After the deposition of the Cr binding layer on the metal surface is completed, the bias voltage is reduced to -180V, and the N 2 , control the air press...

Embodiment 3

[0046] Clean the keyway milling cutter and clean it with N 2 Put it on the substrate holder of the sample after blowing dry, when the background vacuum degree of the vacuum chamber is 8'10 -4 When Pa, pass Ar gas and control the air pressure at 5'10 -2 Pa, the substrate temperature is 300°C, the ion source voltage of the anode layer is turned on at 1000V, the current is 3A, the rotation speed of the substrate holder is 3 rpm, the negative bias voltage is -900 V, and the bombardment time is 30 min. After glow cleaning, adjust the vacuum to 0.8 Pa, turn on the arc ion plating metal Cr target, bombard the substrate for 20 min, keep the bias voltage at -900V, turn on the anode layer ion source, adjust the voltage at 800 V, and the current 2A to obtain Cr metal The interface bonding layer has a thickness of 120nm. After the deposition of the Cr binding layer on the metal surface is completed, the bias voltage is reduced to -150V, and the N 2 , control the air pressure at 1.0 Pa,...

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Abstract

The invention discloses a superlubricity multilayer nano composite coating and a preparation method thereof. The coating comprises a Cr metal combination layer coated on a cutter matrix, a CrN transition layer, a gradient structure nano periodicity TiSin-TiAlN supporting layer, a nano composite TiAlSiCN functional layer and a DLC surface lubricating layer from inner to outer. The gradient structure nano periodicity TiSin-TiAlN supporting layer can greatly reduce the internal stress and improves combination intensity and toughness of a coating layer; and the DLC surface lubricating layer has low friction coefficient, can reduce abrasive wearing and increase the cutter life. The composite coating has combination force greater than 80N, internal stress less than 0.12Gpa, hardness higher than 40Pa, and friction coefficient as low as 0.2, and the cutting experiments show that the cutter life can be effectively increased. The cutter containing the coating is suitable for cutting process of an aluminum alloy and a high hardness steel material under high speed condition.

Description

technical field [0001] The invention relates to the technical field of coating synthesis, in particular to a super-lubricating multilayer nanocomposite coating and a preparation method thereof. Background technique [0002] Modern metal cutting requires the tool to have high cutting speed, high feed speed, high precision and good cutting control. At the same time, materials with high hardness and high wear resistance are increasingly being used to manufacture automotive engine parts and precision molds. The hardness of these materials is as high as HRC 48-65, and the cutting force and cutting temperature are high during processing, which leads to the rapid failure of the tool and has very strict requirements on the comprehensive performance of the tool. The performance of the cutting tool has a decisive influence on the efficiency, precision and surface quality of the cutting process. The instability, damage and destruction of most tool materials during use start from the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C14/06C23C14/35C23C14/14B32B15/04B32B9/04
Inventor 邹长伟王佳李东科谢伟
Owner LINGNAN NORMAL UNIV
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