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CN-121976157-A - Method for preparing anti-erosion strong wear-resistant aluminum alloy and TiN film on surface of aluminum alloy

CN121976157ACN 121976157 ACN121976157 ACN 121976157ACN-121976157-A

Abstract

The invention provides an anti-erosion strong wear-resistant aluminum alloy and a preparation method of an aluminum alloy surface TiN film, relating to the technical field of aluminum alloy surface treatment and aiming at solving the problem that the performance of an aluminum alloy matrix is affected in the deposition process of the TiN film. The preparation method of the TiN film on the surface of the aluminum alloy is characterized by comprising the steps of depositing a transition layer on an aluminum alloy substrate, depositing a Ti/TiN multilayer film on the transition layer, reducing the temperature of the aluminum alloy substrate after each deposition in the process of depositing the transition layer, and reducing the temperature of the aluminum alloy substrate after the deposition of the TiN. Which reduces or eliminates the effect on the properties of the aluminum alloy substrate during film deposition.

Inventors

  • HE JING
  • YU PENG
  • LIU GUIXIN

Assignees

  • 北京金轮坤天特种机械有限公司

Dates

Publication Date
20260505
Application Date
20251231

Claims (10)

  1. 1. The anti-erosion strong wear-resistant aluminum alloy is characterized by comprising an aluminum alloy substrate (11), a transition layer and a Ti/TiN multilayer film which are sequentially arranged, wherein the transition layer comprises a first transition layer (13) and a second transition layer (14), the first transition layer (13) is made of aluminum, the second transition layer (14) is made of titanium, the first transition layer (13) is positioned between the aluminum alloy substrate (11) and the second transition layer (14), and the Ti/TiN multilayer film comprises a plurality of layers of alternately arranged Ti films and TiN films.
  2. 2. A preparation method of a TiN film on the surface of an aluminum alloy is characterized by comprising the steps of depositing a transition layer on an aluminum alloy substrate (11), depositing a Ti/TiN multilayer film on the transition layer, reducing the temperature of the aluminum alloy substrate (11) after each deposition in the process of depositing the transition layer, and depositing the Ti/TiN multilayer film comprises the step of depositing TiN, wherein the temperature of the aluminum alloy substrate (11) is reduced after the deposition of the TiN.
  3. 3. The method for preparing the TiN film on the surface of the aluminum alloy according to claim 2, wherein the depositing of the transition layer comprises depositing a first transition layer (13) and depositing a second transition layer (14) on the first transition layer (13), wherein the first transition layer (13) is aluminum, and the second transition layer (14) is titanium.
  4. 4. The method for preparing a TiN film on an aluminum alloy surface according to claim 3, wherein the first transition layer (13) and the second transition layer (14) are deposited, the pressure is 0.5Pa-1.5Pa, the argon flow is set to 200sccm-300sccm, the bias voltage is 120V-150V, the arc source current is 60A-80A, the multi-arc target working time is 18min-22min, and the cooling time after the multi-arc target is closed is 15min-20min.
  5. 5. The method for producing a TiN film on an aluminum alloy surface according to any one of claims 1 to 4, wherein the depositing of the Ti/TiN film includes a plurality of deposition cool-down cycles, and in each deposition cool-down cycle, the Ti film is deposited and the TiN film is deposited and then cooled down.
  6. 6. The method for preparing the TiN film on the aluminum alloy surface according to claim 5, wherein in each deposition cooling cycle, a Ti target is selected as a multi-arc target, the arc source current is 60A-80A, the pressure is 0.5 Pa-1.5 Pa, the argon flow is 200 sccm-300 sccm, the bias voltage is 80V-120V, the deposition time is 250 s-300 s, the pressure is 0.5 Pa-2 Pa when the TiN film is deposited, cooling is performed after the multi-arc target is closed, and the cooling time is 15 min-20 min.
  7. 7. The method for preparing the TiN film on the aluminum alloy surface according to claim 5, wherein the deposited Ti/TiN multilayer film sequentially comprises a first type deposited Ti/TiN multilayer film, a second type deposited Ti/TiN multilayer film, a third type deposited Ti/TiN multilayer film, a fourth type deposited Ti/TiN multilayer film and a fifth type deposited Ti/TiN multilayer film, the flow rate of nitrogen is gradually increased from the first type deposited Ti/TiN multilayer film to the third type deposited Ti/TiN multilayer film, the deposition time of TiN is gradually increased from the third type deposited Ti/TiN multilayer film to the fifth type deposited Ti/TiN multilayer film.
  8. 8. The preparation method of the aluminum alloy surface TiN film according to claim 7, wherein in the first type of deposited Ti/TiN multilayer film, the argon flow is 340-360 sccm, the bias voltage is 90-110V, the deposition time is 500-600 s, in the second type of deposited Ti/TiN multilayer film, the argon flow is 390-410 sccm, the bias voltage is 90-110V, the deposition time is 5000-600 s, in the third type of deposited Ti/TiN multilayer film, the argon flow is 460-510 sccm, the bias voltage is 70-110V, the deposition time is 500-600 s, in the fourth type of deposited Ti/TiN multilayer film, the argon flow is 190-510sccm, the bias voltage is 70-110V, the deposition time is 750-900 s, in the first type of deposited Ti/TiN multilayer film, the argon flow is 190-110V, and the deposition time is 120-110V, in the third type of deposited Ti/TiN multilayer film, the argon flow is 500-110V, and the deposition time is 500-110V.
  9. 9. The method for preparing the TiN film on the aluminum alloy surface according to claim 5, wherein the first type of deposited Ti/TiN multilayer film and the second type of deposited Ti/TiN multilayer film comprise two deposition cooling cycles, and the third type of deposited Ti/TiN multilayer film, the fourth type of deposited Ti/TiN multilayer film and the fifth type of deposited Ti/TiN multilayer film comprise five deposition cooling cycles.
  10. 10. The method for preparing the TiN film on the aluminum alloy surface according to any one of claims 2 to 4, further comprising the steps of performing plasma etching cleaning after cleaning and drying an aluminum alloy substrate (11), wherein the plasma etching cleaning comprises eight to ten cleaning cooling cycles, cooling the aluminum alloy substrate (11) after plasma etching a surface oxide film in each cleaning cooling cycle, the power of an ion source is 1kw to 1.5kw, the flow of argon is 200sccm to 500sccm, the bias voltage is 550V to 650V, the working time of the ion source is 80s to 100s, the cooling time is 800s to 1000s after the ion source is turned off, and the total working time of the ion source is 640s to 900s in each cleaning cooling cycle.

Description

Method for preparing anti-erosion strong wear-resistant aluminum alloy and TiN film on surface of aluminum alloy Technical Field The invention relates to the technical field of aluminum alloy surface treatment, in particular to an anti-erosion and strong wear-resistant aluminum alloy and a preparation method of a TiN film on the surface of the aluminum alloy. Background The aluminum alloy has a series of excellent performances such as low density, high elastic modulus, low thermal expansion coefficient, easy molding and processing and the like, and is widely applied to the fields such as automobiles, aviation, aerospace, ships, mechanical manufacturing and the like. However, the aluminum alloy has the defects of low hardness, high friction coefficient, no wear resistance, poor lubricity and the like, and the application of the aluminum alloy in the industrial field is greatly limited. In order to improve the wear resistance and corrosion resistance of aluminum alloys, in addition to improving the materials of the aluminum alloys themselves, the modification of protecting and strengthening the surfaces of the aluminum alloys is also a very important research direction. At present, besides the way of changing the surface components of the material to strengthen the structure by carburizing, nitriding or metal ion implantation, the most effective way is to adopt the surface coating technology, so that the comprehensive service performance of the part is greatly improved on the premise of not changing the original characteristics of the base material such as geometry, materiality and the like, the capability of resisting the action of the working environment is fully improved, and the protection and strengthening modification effects are achieved. At present, the common surface coating technology at home and abroad mainly comprises processes such as anodic oxidation, electroplating, micro-arc oxidation, thermal spraying, laser treatment, chemical vapor deposition, physical vapor deposition and the like for modifying the surface of aluminum and aluminum alloy so as to improve the application performance of the aluminum and aluminum alloy. The technology of preparing the functional coating on the surface of the aluminum alloy by utilizing the vapor deposition principle is utilized, the coating prepared by the surface coating is uniform and compact, and meanwhile, the bonding strength is higher, the surface performance of the aluminum alloy can be improved pertinently according to the difference of coating materials, and the method is an important preparation method of the hard film. The TiN film belongs to IV transition metal nitride, the structure of the TiN film is formed by mixing covalent bonds and metal bonds, and the TiN film has the characteristics of metal crystals and covalent metals, and has the properties of high hardness, good wear resistance, excellent high-temperature oxidation resistance and the like, so the TiN film is used for designing protective coatings on the surface of aluminum alloy and has very good wear-resistant application effects. Although some processes for preparing antifriction and wear-resistant coatings on aluminum alloy surfaces by utilizing multi-arc ion plating or magnetron sputtering have been developed in recent years, the problem that the deposition temperature of the aluminum alloy substrate exceeds the aging heat treatment temperature of the aluminum alloy to improve the mechanical property and the comprehensive strength of the substrate, and the fatigue property and other excellent strength performance indexes of the aluminum alloy are affected because most aluminum alloys need to be subjected to aging heat treatment in the processing process, the aging heat treatment temperature is generally 170-190 ℃, and the deposition temperature of the multi-arc ion plating is generally about 200-300 ℃ to obtain hard films with excellent performance. (2) A layer of hard film is prepared on the surface of an aluminum alloy by using a multi-arc ion plating machine, and even under the normal temperature deposition condition, as the energy of the multi-arc ion plating is relatively high, part of the energy is converted into heat energy when the multi-arc ion plating is deposited on a substrate, the temperature of the substrate is rapidly increased, and the temperature of the substrate also exceeds 180 ℃, so that the aging temperature of the aluminum alloy is exceeded, and the performance index of the aluminum alloy substrate is affected. (3) The aluminum alloy belongs to soft metal, the hard film is harder, eggshell effect is generated when the hard film is deposited on the soft metal, the binding force between the hard film and a matrix is seriously affected, and secondly, the deposition temperature is lower than the aging temperature of the aluminum alloy, so that low-temperature deposition is realized, and the bonding strength between the film and the matrix is seriously affected due