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CrAlN/CrAlSiN/TaC composite coating with low friction coefficient and high wear resistance and preparation method of CrAlN/CrAlSiN/TaC composite coating

A low friction coefficient, composite coating technology, applied in the coating, metal material coating process, superimposed layer plating, etc., can solve the problem of poor bonding strength, low material fatigue strength, poor wear resistance and corrosion resistance, etc. Problems, to achieve high interface bonding strength, high hardness wear resistance, excellent wear resistance effect

Pending Publication Date: 2022-07-29
CHONGQING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The commonly used surface modification technologies are: (1) Laser cladding technology, which has the advantages of being able to generate a large number of intermediate strengthening phases, flexible processing range, controllable laser energy, and various cladding materials, but laser cladding is easy to form pores, Oxidation, component segregation, and large residual stress defects; (2) plasma spraying technology, which has the advantages of simple process, low cost, and large-area thick coatings, but there are high porosity of the coating and the bonding between the coating and the substrate. Poor strength and low fatigue strength of materials; (3) Micro-arc oxidation technology has excellent properties such as high hardness, high temperature resistance, corrosion resistance and wear resistance, but the coating has a loose porous structure, wear resistance and corrosion resistance (4) Multi-arc ion plating technology has the advantages of vacuum coating environment, no pollution, fast deposition speed, uniform film layer, etc.
At present, there are few reports on the surface modification of titanium alloys by multi-arc ion plating technology, especially the reports on the preparation of TaC coatings by multi-arc ion plating technology

Method used

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  • CrAlN/CrAlSiN/TaC composite coating with low friction coefficient and high wear resistance and preparation method of CrAlN/CrAlSiN/TaC composite coating
  • CrAlN/CrAlSiN/TaC composite coating with low friction coefficient and high wear resistance and preparation method of CrAlN/CrAlSiN/TaC composite coating
  • CrAlN/CrAlSiN/TaC composite coating with low friction coefficient and high wear resistance and preparation method of CrAlN/CrAlSiN/TaC composite coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] The invention provides a CrAlN / CrAlSiN / TaC composite coating with low friction coefficient and high wear resistance and a preparation method thereof, comprising the following steps:

[0031] Step 1. Cut the TC4 titanium alloy sheet into 10mm×10mm×4mm samples, then use sandpaper and polishing machine to polish and clean;

[0032] Step 2. Plasma nitriding is performed on the sample in Step 1;

[0033] Step 3, vertically suspend the sample in Step 2 on the turret in the multi-arc ion plating chamber to deposit the composite coating;

[0034] Step 4. After the deposition is completed, turn off the power supply, stop the flow of argon and nitrogen, and take out the sample after cooling to room temperature with the furnace.

[0035] Further, the samples in step 1 are respectively placed in absolute ethanol, acetone and deionized water for ultrasonic cleaning for 10-15 minutes, and then taken out and dried;

[0036] Further, the temperature of the plasma nitriding in step 2 ...

Embodiment 2

[0044] The invention provides a CrAlN / CrAlSiN / TaC composite coating with low friction coefficient and high wear resistance and a preparation method thereof, comprising the following steps:

[0045] Step 1. Cut the TC4 titanium alloy sheet into 10mm×10mm×4mm samples, then use sandpaper and polishing machine to polish and clean;

[0046] Step 2. Plasma nitriding is performed on the sample in Step 1;

[0047] Step 3, vertically suspend the sample in Step 2 on the turret in the multi-arc ion plating chamber to deposit the composite coating;

[0048] Step 4. After the deposition is completed, turn off the power supply, stop the flow of argon and nitrogen, and take out the sample after cooling to room temperature with the furnace.

[0049] Further, the samples in step 1 are respectively placed in absolute ethanol, acetone and deionized water for ultrasonic cleaning for 10-15 minutes, and then taken out and dried;

[0050] Further, the temperature of the plasma nitriding in step 2 is...

Embodiment 3

[0058] The invention provides a CrAlN / CrAlSiN / TaC composite coating with low friction coefficient and high wear resistance and a preparation method thereof, comprising the following steps:

[0059] Step 1. Cut the TC4 titanium alloy sheet into 10mm×10mm×4mm samples, then use sandpaper and polishing machine to polish and clean;

[0060] Step 2. Plasma nitriding is performed on the sample in Step 1;

[0061] Step 3, vertically suspend the sample in Step 2 on the turret in the multi-arc ion plating chamber to deposit the composite coating;

[0062] Step 4. After the deposition is completed, turn off the power supply, stop the flow of argon and nitrogen, and take out the sample after cooling to room temperature with the furnace.

[0063] Further, the samples in step 1 are respectively placed in absolute ethanol, acetone and deionized water for ultrasonic cleaning for 10-15 minutes, and then taken out and dried;

[0064] Further, the temperature of the plasma nitriding in step 2 ...

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Abstract

The invention discloses a CrAlN / CrAlSiN / TaC composite coating low in friction coefficient and high in wear resistance and a preparation method of the CrAlN / CrAlSiN / TaC composite coating. The preparation method comprises the following steps that (1) firstly, the surface hardness of TC4 titanium alloy is improved through a plasma nitriding technology; (2) ion cleaning is conducted on the surface of the TC4 titanium alloy before the composite coating is deposited; (3) a CrAlN transition layer is deposited for 10-30 min; by controlling the deposition time and the substrate bias voltage, the composite coating with high hardness and excellent wear resistance is deposited on the surface of the TC4 titanium alloy subjected to plasma nitriding treatment, and the surface hardness and wear resistance of the TC4 titanium alloy are remarkably improved.

Description

technical field [0001] The invention belongs to the field of coatings, in particular to a CrAlN / CrAlSiN / TaC composite coating with low friction coefficient and high wear resistance and a preparation method thereof. Background technique [0002] Titanium alloy has excellent comprehensive properties such as low density, high specific strength and corrosion resistance. It is widely used in aviation, aerospace, navigation and chemical industries. It is known as the "third generation metal" and is an important structural metal. , is also an important strategic metal material. my country's titanium ore reserves rank first in the world, but the manufacturing and application of titanium alloys are far less than developed countries. Although titanium alloys have a very broad development market in my country, the shortcomings of low surface hardness, poor wear resistance and poor high temperature oxidation resistance of titanium alloys seriously limit the development of titanium allo...

Claims

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Application Information

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IPC IPC(8): C23C14/02C23C14/06C23C14/32C23C28/04C23C8/36
CPCC23C14/325C23C14/024C23C14/0641C23C14/0635C23C8/36C23C28/04
Inventor 周志明吴一若王永锋涂坚黄灿王军军张琰斌余春堂方勤胡瀚杰陈全龙孙青云
Owner CHONGQING UNIV OF TECH
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