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Treatment method for low-friction solid-liquid composite lubrication of surface of aluminum-lithium alloy

An aluminum-lithium alloy and solid-liquid composite technology, applied in the field of tribology, can solve problems such as low friction, lack of lubrication mechanism, and inability to obtain low friction, and achieve the effects of reducing friction coefficient, improving tribological performance, and shortening the running-in period

Pending Publication Date: 2022-05-27
NORTHWEST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Based on the surface modification process, the anodic oxidation technology of pure aluminum and some aluminum alloys is relatively mature, which is mainly used to improve the corrosion resistance and friction corrosion resistance of pure aluminum and aluminum alloys. Compared with the more plastic aluminum-lithium alloy substrates, The plastic deformation resistance of the anodic oxide layer is improved, and its engineering application prospect is good; however, alumina grain fracture (intergranular, intragranular or a mixture of the two) becomes the main form of wear, and at the same time lacks a reliable lubrication mechanism
Therefore, no matter under dry friction or liquid boundary lubrication conditions, low friction (friction coefficient below 0.05) or even ultra-low friction (10 -3 magnitude)

Method used

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  • Treatment method for low-friction solid-liquid composite lubrication of surface of aluminum-lithium alloy
  • Treatment method for low-friction solid-liquid composite lubrication of surface of aluminum-lithium alloy
  • Treatment method for low-friction solid-liquid composite lubrication of surface of aluminum-lithium alloy

Examples

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Embodiment 1

[0043] A method for treating low-friction solid-liquid composite lubrication on the surface of an aluminum-lithium alloy, comprising the following steps:

[0044] S1: Pretreating the surface of the aluminum-lithium alloy substrate; the aluminum-lithium alloy substrate is a rolled (subsurface) 2060-T8E30 aluminum-lithium alloy substrate, the surface roughness Ra is 0.384mm, and the size is 350×150 ×3mm.

[0045] Specifically, S101: carry out chemically pure ethanol ultrasonic degreasing on the aluminum-lithium alloy substrate, the ultrasonic power is 40W, the ultrasonic time is 10min, then rinsed with distilled water, and dried with a hair dryer at low temperature;

[0046] S102: deoxidize the cleaned and dried aluminum-lithium alloy substrate with 50g / L sodium hydroxide solution at 50°C for 13s;

[0047] S103: Rinse the deoxidized Al-Li alloy substrate with distilled water, and then use 30% HNO at room temperature 3 The solution is cleaned to remove the residual sodium hydroxi...

Embodiment 2

[0067] The difference between Example 2 and Example 1 is only that the aluminum-lithium alloy used in Example 2 is a 2060-T8E30 aluminum-lithium alloy substrate in a polished state (that is, bright surface), and all other operation steps are the same as those in Example 1. .

Embodiment 3

[0074] The difference between the third embodiment and the first embodiment is only that the ionic liquid used in step S4 is different, and other operation steps are the same as those of the first embodiment. Specifically, the aluminum-lithium alloy used in Example 3 is a rolled (subsurface) 2060-T8E30 aluminum-lithium alloy substrate, the surface roughness Ra is 0.384mm, and the size is 350×150×3mm. The ionic liquid is 1-octyl-3-methylimidazolium tetrafluoroborate (BF4 for short), and its structural formula is

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Abstract

The invention discloses an aluminum-lithium alloy surface low-friction solid-liquid composite lubrication treatment method which comprises the following steps: S1, pre-cleaning the surface of an aluminum-lithium alloy substrate, and then carrying out deoxidation treatment by using alkali liquor to realize cleaning and activation of the aluminum-lithium alloy surface; s2, a chromic acid anodic oxidation process is utilized, and porous anodic oxidation layers are prepared on the surface of the pretreated aluminum-lithium alloy substrate to serve as a bearing layer and a transition layer; s3, depositing a nanogold film on the surface of the porous anodic oxide layer by adopting a direct current sputtering technology; and S4, the surface of the nanogold film is coated with ionic liquid, and solid-liquid composite lubrication is achieved under lubrication of the ionic liquid. The nanogold thin film deposited on the surface of the porous anodic oxide layer and the ionic liquid form a composite lubricating film or form a millimeter-scale island-shaped structure in the sliding process, and therefore low friction and even ultralow friction are achieved.

Description

technical field [0001] The invention relates to the technical field of tribology, in particular to a treatment method for low-friction solid-liquid composite lubrication on the surface of an aluminum-lithium alloy. Background technique [0002] Aluminum materials are a kind of important engineering materials, but when aluminum materials are used as tribological materials, they have serious weaknesses such as softness, high friction coefficient, large wear, easy to be pulled and difficult to lubricate. Tribological surface modification of aluminum materials is an effective way to solve the above problems (Chen Jianmin et al., Tribological surface modification of aluminum materials, Journal of Tribology, 1994, 14(3): 259-269). As a lightweight and high specific strength material, aluminum-lithium alloy is expected to be applied in the field of tribology (Zhang Siyuan et al., Effect of aging treatment on the tribological behavior of AA2099 aluminum-lithium alloy, Journal of Tri...

Claims

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Application Information

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IPC IPC(8): C25D11/16C25D11/08C25D11/18C23C14/18C23C14/34C10M133/46C10N30/06C10N40/24
CPCC25D11/16C25D11/08C25D11/18C23C14/34C23C14/185C10M133/46C10N2030/06C10N2040/24C10M2215/224Y02T10/86
Inventor 吕晋军屈荣陈双双赵晓霞乔亚楠陈琳鹏姚瑞清
Owner NORTHWEST UNIV
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