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Preparation method of Ti5Si3 particle reinforced TiAl-based composite material plate

A particle-reinforced, composite material technology, which is applied in the field of preparation of TiAl-based composite material sheets, can solve the problems of complex preparation process and uneven distribution of reinforcements, and achieve the effects of good bonding, enhanced mechanical properties, and uniform structure.

Inactive Publication Date: 2012-10-24
HARBIN INST OF TECH
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Problems solved by technology

[0004] The present invention aims to solve the technical problems of the existing method for preparing particle-reinforced TiAl-based composite material plates, the preparation process is complex, many follow-up processes are required, and the distribution of reinforcements is uneven, so as to provide Ti 5 Si 3 Preparation Method of Particle Reinforced TiAl-Based Composite Material Sheet

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  • Preparation method of Ti5Si3 particle reinforced TiAl-based composite material plate

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specific Embodiment approach 1

[0015] Specific implementation mode one: present implementation mode Ti 5 Si 3 The preparation method of the particle-reinforced TiAl-based composite material plate is carried out according to the following steps:

[0016] 1. Alternately stack Al-Si alloy plates and pure Ti plates in a vacuum hot-press sintering furnace. First, vacuum the vacuum hot-press sintering furnace to a vacuum degree of 0.01Pa, then raise the temperature to 300-500°C, and apply Hot pressing at a pressure of 10-30MPa for 0.5-2h, and then hot-rolling at 300-500°C to prepare Al-Si / Ti multilayer composite plates;

[0017] 2. The multi-layer composite plate prepared in step 1 is placed in a vacuum hot-pressing sintering furnace, heat-treated at 500-700°C for 5-30 hours, and then at 900-1200°C for 5-40 hours to obtain Ti 5 Si 3 Particle-reinforced TiAl-based composite sheet.

[0018] This embodiment adopts Ti rolled and heat-treated to prepare 5 Si 3 Particle-reinforced TiAl-based composite sheet, incl...

specific Embodiment approach 2

[0023] Specific embodiment 2: The difference between this embodiment and specific embodiment 1 is that in step 1, the number of Al-Si alloys and Ti plates alternately laminated is 2n+1 layers, n is a positive integer less than 200, and the outermost The layers are all pure Ti plates. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0024] Embodiment 3: This embodiment differs from Embodiment 1 or Embodiment 2 in that: in step 1, the thickness of the Al—Si alloy and the pure Ti plate are not more than 1 mm. Others are the same as in the first or second embodiment.

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Abstract

The invention provides a preparation method of a Ti5Si3 particle reinforced TiAl-based composite material plate, which relates to a preparation method of a TiAl-based composite material plate. The invention is to solve technical problems of complicated preparation process, the need of numerous follow-up machining and distribution nonuniformity of a reinforced body in the traditional method for preparing the particle reinforced TiAl-based composite material plate. According to the invention, the preparation method is carried out in the following steps of: after alternatively laminating an Al-Si alloy plate and a Ti plate, rolling the laminated plates so as to obtain a multi-layer composite plate; and carrying out heat treatment on the multi-layer composite plate so as to obtain the Ti5Si3 particle reinforced TiAl-based composite material plate. The TiAl-based composite material plate prepared according to the invention has the advantages of uniform structure as well as fine and dispersed reinforced body particles and can be used as structural materials in the aerospace field.

Description

technical field [0001] The invention relates to a preparation method of a TiAl-based composite material plate. Background technique [0002] Due to its own performance characteristics, TiAl-based alloys will become the preferred structural materials for future aerospace applications. It has the characteristics of high specific strength, high specific stiffness, and good high-temperature oxidation resistance, but the simple TiAl-based metal compound has the problem of insufficient high-temperature strength, and the preparation of composite materials after adding reinforcements can effectively solve this problem. The preparation of TiAl-based materials is one of the important breakthroughs in its use. However, due to the room temperature brittleness and low fracture toughness of TiAl alloys, the requirements for the preparation of the materials are extremely harsh, and the preparation of TiAl-based composite materials with dispersion reinforcement more difficult. [0003] Ti...

Claims

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Application Information

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IPC IPC(8): B22F7/04
Inventor 耿林逄锦程范国华李爱斌崔喜平张杰郑镇洙
Owner HARBIN INST OF TECH
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