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
CN111850337AActive Publication Date: 2020-10-30XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
Publication Date
2020-10-30

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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.
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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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