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High-temperature high-strength wear-resistant self-lubricating material and preparation method thereof

A self-lubricating material and high-temperature technology, which is applied in the field of metal material manufacturing and powder metallurgy, can solve the problems of reducing the matching accuracy, service life and reliability of parts, reducing the service life of the engine, system safety, and increasing energy consumption. The effect of particle size reduction, good density, and microhardness improvement

Active Publication Date: 2020-10-30
XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when it is used as the rotating bearing of the turbine blade of an aero-engine, it will have the problem of fretting wear under high temperature conditions, which greatly reduces the service life of the engine and the safety of the system.
High-frequency friction causes heat generation and increases energy consumption, and wear reduces the fitting accuracy, service life and reliability of parts

Method used

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  • High-temperature high-strength wear-resistant self-lubricating material and preparation method thereof
  • High-temperature high-strength wear-resistant self-lubricating material and preparation method thereof
  • High-temperature high-strength wear-resistant self-lubricating material and preparation method thereof

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preparation example Construction

[0036] A method for preparing a high-temperature, high-strength wear-resistant self-lubricating material of the present invention, the specific steps are as follows:

[0037] (1) Argon gas is passed to the vacuum glove box, and Ag powder and TiB are weighed in the vacuum glove box 2 Powder and Ti 2 AlNb spherical pre-alloyed powder, in mass percentage: the mass of Ag powder is Ag powder, TiB 2 Powder and Ti 2 1% to 15% of the total mass of AlNb spherical pre-alloyed powder, TiB 2 The mass is Ag powder, TiB 2 Powder and Ti 2 1% to 7% of AlNb spherical pre-alloyed powder, and the argon atmosphere is always kept in the glove box during the weighing process; among them, the particle size of Ag powder is 1 μm to 2 μm; TiB 2 The particle size of powder is 3μm~5μm; Ti 2 AlNb pre-alloyed powder is a spherical powder prepared by gas atomization, with a particle size of 80 μm to 100 μm;

[0038] The weighed Ag powder, TiB 2 Powder and Ti 2 The AlNb spherical pre-alloyed powder ...

Embodiment 1

[0045] The preparation method of the high-temperature high-strength wear-resistant self-lubricating material of this embodiment is carried out according to the following steps:

[0046] (1) By mass percentage, the content of Ag powder is Ag powder, TiB 2 Powder and Ti 2 15% of the total mass of AlNb spherical pre-alloyed powder, TiB 2 The powder content is Ag powder, TiB 2 Powder and Ti 2 1% of the total mass of AlNb spherical pre-alloyed powder, weighing Ag powder and TiB in a glove box in an argon atmosphere state 2 Powder and Ti 2 AlNb pre-alloyed powder. Place the weighed powder into an anhydrous ethanol solution for ultrasonic dispersion in a 35°C water bath for 3 hours to make the powder into a slurry-like material;

[0047] (2) Put the slurry-like material prepared in step (1) together with stainless steel grinding balls into the ball milling tank. During this process, the argon atmosphere is always maintained in the glove box, and the ball-to-material ratio is 6:...

Embodiment 2

[0054] The preparation method of the high-temperature high-strength wear-resistant self-lubricating material of this embodiment is carried out according to the following steps:

[0055] (1) By mass percentage, the content of Ag powder is Ag powder, TiB 2 Powder and Ti 2 10% of the total mass of AlNb spherical pre-alloyed powder, TiB 2 The powder content is Ag powder, TiB 2 Powder and Ti 2 2% of the total mass of AlNb spherical pre-alloyed powder, weighing Ag powder and TiB in a glove box in an argon atmosphere state 2 Powder and Ti 2 AlNb pre-alloyed powder. Place the weighed powder into an anhydrous ethanol solution for ultrasonic dispersion in a water bath at 35°C for 6 hours, so that the powder becomes a slurry-like material;

[0056] (2) Put the slurry-like material prepared in step (1) together with stainless steel grinding balls into the ball milling tank. During this process, the argon atmosphere is always maintained in the glove box, and the ball-to-material rati...

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Abstract

The invention discloses a high-temperature high-strength wear-resistant self-lubricating material and a preparation method thereof, and belongs to the field of metal material manufacturing and powdermetallurgy. The preparation method comprises the following steps of (1) taking Ag powder and TiB2 powder as a lubricating phase and a reinforcing phase, and taking Ti2AlNb powder as matrix powder; (2)ultrasonically dispersing powder in a solution to obtain slurry; (3) putting the pre-ultrasonic slurry and grinding balls into a ball milling tank for ball milling, so that the powder is fully mixedand the particle size is uniform; (4) drying the ball-milled slurry in a vacuum drying oven; (5) crushing the dried powder by using a wall breaking machine; and (6) putting the crushed mixed powder into a graphite mold, carrying out spark plasma sintering, carrying out furnace cooling to room temperature, and taking out to obtain the high-temperature high-strength wear-resistant self-lubricating material; the problem that the high-temperature friction performance of the aviation titanium alloy is poor is solved, process is simple; the lubricating phase and the reinforcing phase are tightly combined with the matrix, and the material density is high; and the hardness, high-temperature strength and high-temperature wear resistance of the material are obviously enhanced.

Description

technical field [0001] The invention belongs to the fields of metal material manufacturing and powder metallurgy, and in particular relates to a high-temperature, high-strength wear-resistant self-lubricating material and a preparation method thereof. Background technique [0002] Ti-Al alloys have light weight, high strength and excellent high temperature performance, and have become one of the most promising aerospace materials. However, when it is used as a rotating bearing of an aeroengine turbine blade, fretting wear will occur under high temperature conditions, which greatly reduces the service life of the engine and the safety of the system. High-frequency friction causes heat generation and increases energy consumption, and wear reduces the fitting accuracy, service life and reliability of parts. Therefore, the friction problem of Ti-Al alloys has become one of the problems urgently solved by Ti-Al alloys. [0003] Under extreme conditions such as high speed, high ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/05C22C14/00C22C32/00B22F3/105
CPCB22F3/105B22F2003/1051C22C1/05C22C14/00C22C32/0073
Inventor 王伟韩子茹王庆娟程鹏周海雄孙壮高原王快社
Owner XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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