A high-temperature, high-strength wear-resistant self-lubricating material and its preparation method

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, etc., to achieve good High-temperature mechanical properties and friction and wear properties, grain size reduction, increased hardness and stability effects

Active Publication Date: 2021-08-31
XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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  • Abstract
  • Description
  • Claims
  • Application Information

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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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  • A high-temperature, high-strength wear-resistant self-lubricating material and its preparation method
  • A high-temperature, high-strength wear-resistant self-lubricating material and its preparation method
  • A high-temperature, high-strength wear-resistant self-lubricating material and its preparation method

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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, belonging to the fields of metal material manufacturing and powder metallurgy. Described preparation method comprises: (1) with Ag powder and TiB 2 Powder as lubricating and reinforcing phase, Ti 2 AlNb powder is used as matrix powder. (1) Put the powder into the solution and ultrasonically disperse it into a slurry; (3) Put the pre-ultrasonic slurry and grinding balls together into a ball milling tank for ball milling, so that the powder is fully mixed and the particle size is uniform; (4) Ball milling The final slurry is dried in a vacuum oven; (5) the dried powder is crushed with a wall breaker; (6) the crushed mixed powder is put into a graphite mold for discharge plasma sintering, and the furnace is cooled to room temperature and taken out. That is, the high-temperature high-strength wear-resistant self-lubricating material of the present invention is obtained. The invention solves the problem of poor high-temperature friction performance of the aviation titanium alloy. Simple process. The lubricating phase and reinforcing phase are closely combined with the matrix, and the material has high density. The hardness, high temperature strength and high temperature wear resistance of the material are all significantly improved.

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 Patents(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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