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Preparation method of TiAl-based laminar composite material plate

A composite material board, composite board technology, applied in metal layered products, chemical instruments and methods, lamination and other directions, can solve the problems of poor tissue uniformity, poor tissue compactness, etc. The effect of internal oxidation

Inactive Publication Date: 2012-10-17
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The present invention aims to solve the problems of poor structure compactness and poor structure uniformity of the existing TiAl-based materials, and provides a preparation method of a TiAl-based composite material plate

Method used

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  • Preparation method of TiAl-based laminar composite material plate
  • Preparation method of TiAl-based laminar composite material plate

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specific Embodiment approach 1

[0014] Specific embodiment one: the preparation method of a kind of TiAl-based composite material plate of this embodiment is carried out according to the following steps:

[0015] 1. The reinforcement and Ti powder are ball milled for 7-10 hours under the condition that the mass ratio of the ball to material is 5:1 and the rotation speed is 180-200rmp to obtain a mixed powder, in which the reinforcement is TiB 2 , the reinforcement accounts for 3% to 5% of the mass of the mixed powder;

[0016] 2. Add the mixed powder obtained in step 1 into the mold, then put the mold in a hot-press furnace, and press it for 1-1.5 hours at a temperature of 1200-1300 ° C and a pressure of 25-30 MPa to obtain a hot-pressed ingot ; Cut the hot-pressed ingot wire into plates, and then obtain the TiB / Ti composite plate after surface pretreatment;

[0017] 3. After the surface pretreatment, the Al plate is alternately stacked with the TiB / Ti composite plate obtained in step 2 and placed in a hot-...

specific Embodiment approach 2

[0019] Specific embodiment 2: The difference between this embodiment and specific embodiment 1 is that the surface pretreatment described in step 2 is: cleaning in 10vol.% HF solution and thinning to the designed thickness, then grinding the surface to remove the knife trace and corroded layer, others are the same as the first embodiment.

specific Embodiment approach 3

[0020] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that the surface pretreatment of the Al plate described in step 3 is as follows: the Al plate is polished with 600-mesh or 800-mesh sandpaper, and then 10wt.% NaOH Alkali washing, others are identical with specific embodiment one or two.

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Abstract

The invention discloses a preparation method of a TiAl-based laminar composite material plate, which is used for solving the problems of poor tissue compactness and poor tissue uniformity existing in the conventional TiAl-based material. The method comprises the following steps of: performing ball milling and powder mixing on reinforced bodied and Ti powder, and performing hot pressed sintering, linear cutting and surface pretreatment to obtain a TiB / Ti composite plate on which reinforced bodies are distributed continuously; performing surface treatment on the TiB / Ti composite plate and a pure Al plate, and performing laminating and hot pressing alternatively; and performing thermal treatment to perform a diffusion reaction on the Ti plate and the Al plate to obtain a TiAl-based laminar composite material plate. The TiAl-based laminar composite material plate disclosed by the invention can be used for preparing parts of aviation or space flight engines or wings or shell of ultrahigh-speed flying vehicles and preformed materials formed in a super plasticizing way.

Description

technical field [0001] The invention relates to a preparation method of a TiAl composite material plate. Background technique [0002] TiAl-based alloy is a new type of lightweight heat-resistant structural material, with a specific gravity less than 50% of that of nickel-based alloys. It has the advantages of light weight, high strength, corrosion resistance, wear resistance, and high temperature resistance, and has excellent room temperature and high temperature performance. It has become a key material in the research and application of aviation, aerospace and military fields around the world. After decades of hard work, TiAl-based alloys have entered the stage of practical development. Among them, the demand for TiAl-based alloy plates is the most urgent. [0003] The preparation of TiAl-based alloy sheets is one of the most important topics in the practical research of TiAl-based alloys. However, due to the intrinsic brittleness of TiAl-based alloys, it is very diffi...

Claims

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Application Information

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IPC IPC(8): B32B37/06B22F3/03B32B15/01B32B15/20
Inventor 范国华黄明起崔喜平逄锦程耿林张杰
Owner HARBIN INST OF TECH
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