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Titanium alloy surface self-lubricating layer and preparation method thereof

A self-lubricating layer, titanium alloy technology, applied in surface reaction electrolytic coating, metal material coating process, coating and other directions, can solve the problems of load-carrying capacity solid lubricant loss, large temperature change, reducing friction coefficient, etc.

Inactive Publication Date: 2009-09-02
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although the above-mentioned patents can solve the self-lubrication problem from different angles, there are problems that either the self-lubricating film is easy to fall off, or it is not resistant to high temperature, low temperature and large temperature changes, or it is difficult to meet the high-precision matching requirements. There are some deficiencies in the loss of agent and the reduction of the coefficient of friction

Method used

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  • Titanium alloy surface self-lubricating layer and preparation method thereof
  • Titanium alloy surface self-lubricating layer and preparation method thereof
  • Titanium alloy surface self-lubricating layer and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Embodiment 1: Prepare titania nanotube array on the surface of titanium alloy workpiece (1)

[0028] Prepare ammonium sulfate / ammonium fluoride mixed electrolyte at room temperature, take an appropriate amount of analytically pure ammonium sulfate and ammonium fluoride and mix it into ionized water, so that the molar concentration of ammonium sulfate in the mixed electrolyte is 1M, and the molar concentration of ammonium fluoride is 0.14M, pour into the electrolytic cell after completely dissolved. Clean the surface of the Ti-6Al-4V alloy workpiece with distilled water and acetone respectively, then immerse the titanium alloy workpiece in the electrolytic cell, and keep the distance between the surface of the titanium alloy workpiece and the high-purity graphite electrode at 5 cm. Connect the titanium alloy workpiece to the positive pole of the DC power supply, and the graphite to the negative pole, then keep applying a DC voltage of 25V for 20 minutes, and keep the tem...

Embodiment 2

[0031] Embodiment 2: Prepare titania nanotube array on the surface of titanium alloy workpiece (2)

[0032] Prepare phosphoric acid / ammonium fluoride mixed electrolyte at room temperature, weigh an appropriate amount of analytically pure phosphoric acid and ammonium fluoride and mix it into ionized water, so that the molar concentration of phosphoric acid in the mixed electrolyte is 0.3M, and the molar concentration of ammonium fluoride is 0.14M , and pour it into the electrolytic cell after completely dissolving. Clean the surface of the Ti-6Al-4V alloy (or other titanium-based alloy) workpiece and then immerse it in the electrolytic cell, keeping the distance between the surface of the titanium alloy workpiece and the high-purity graphite electrode at 5 cm. A DC voltage of 25V was kept applied between the titanium alloy workpiece and the graphite for 20 minutes, and the temperature of the electrolyte was maintained at 18-25°C. The titanium alloy workpiece is taken out and c...

Embodiment 3

[0034] Embodiment 3: the preparation process of IF-WS2 nanoparticles

[0035] The first step is the preparation of spherical tungsten trioxide nanoparticles.

[0036] Prepare a 3 M HCl solution and a 0.5 M Na solution with deionized water at room temperature. 2 WO 4 solution. Take 500ml ethanol and 1500ml Na 2 WO 4 The solution was fully mixed, and under the synergistic effect of ultrasonic and mechanical stirring, the HCl solution was slowly and uniformly dropped into the reaction system through the dropping funnel until the pH ≈ 1.0, and then maintained ultrasonic and stirred for 30 minutes, and the reaction system became a stable white suspension. Cloudy liquid. The reactants were separated by a centrifuge, washed three times with deionized water, and washed twice with absolute ethanol. Dry in a vacuum oven at 80°C for 6h, and then calcinate in a resistance furnace at 500°C for 2h to obtain about 160 grams of spherical WO with a particle size of 30-60nm. 3 nanopartic...

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Abstract

The invention relates to a titanium alloy surface self-lubricating layer and a preparation method thereof, which belong to the technical field of mechanical lubrication. The structure of the self-lubricating layer is as follows: titanium-dioxide nanometer-tube arrays are formed on the titanium alloy surface, and solid lubricating agent is filled into titanium-dioxide nanometer tubes. The preparation of the self-lubricating layer is as follows: the surface of a titanium alloy matching part forms a titanium-dioxide nanometer-tube array film by an electrochemical anode oxidizing way, and annealing treatment is carried out in the air; and hollow cage-shaped tungsten-disulfide nanometer solid lubricating agent is filled in the nanometer tubes. In the mutual-friction process of the matching part, the nanometer solid lubricating agent in a composite layer is released to give excellent self-lubricating performance to the titanium alloy, is suitable for no-oil lubricating occasions of high and low temperatures, vacuum, pollution avoidance and no maintenance, and has an important application prospect in high-tech fields relevant to mechanical transmission.

Description

technical field [0001] The invention relates to the technical field of mechanical lubrication. Specifically, titanium dioxide (TiO 2 ) nanotube array film, and then filled with nanometer solid lubricant in the nanotubes. During the rubbing process of the pair, the nanometer solid lubricant in the composite layer is released, thus endowing the titanium alloy with good self-lubricating properties. Background technique [0002] In mechanical transmission, drive, support and other mechanisms, whether it is sliding friction or rolling friction, in addition to using friction to do work, people always hope that the friction coefficient between friction pairs should be as small as possible, so as to reduce the wear of parts and save energy. Power, reduce working noise, and prolong the working life of mechanical equipment. Generally speaking, reducing friction can be achieved in two ways. One is to add lubricant, liquid lubricant or solid lubricant between the friction pairs; Lubr...

Claims

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Application Information

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IPC IPC(8): C23F17/00C23C20/08C25D11/26C21D1/26B22F1/02B22F9/16
Inventor 杨海滨刘世凯李明辉付乌有
Owner JILIN UNIV
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