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
CN111850337BActive Publication Date: 2021-08-31XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
Publication Date
2021-08-31

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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.
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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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