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Method for preparing TiAl-based composite material sheet material

An aluminum-based composite material and a composite material technology, which are applied in the field of composite material sheet preparation, can solve the problems of poor tissue density, poor tissue uniformity, internal oxidation, etc., and achieve good tissue density, good tissue uniformity, and dense interface bonding. good effect

Inactive Publication Date: 2009-08-05
HARBIN INST OF TECH
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  • Summary
  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0005] In order to solve the problems of poor structure uniformity, poor structure compactness, serious internal oxidation phenomenon and composite toughening method that can only produce bulk TiAl-based composite materials in the preparation of TiAl-based alloys by the existing technology, the present invention provides a Preparation method of TiAl-based composite material

Method used

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  • Method for preparing TiAl-based composite material sheet material

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specific Embodiment approach 1

[0010] Specific Embodiment 1: The preparation method of the TiAl-based composite material plate in this embodiment is carried out according to the following steps: 1. Heat the alternately laminated aluminum-based composite material plate and pure titanium plate under the conditions of 200-500°C and 28-32MPa Press for 0.5-3 hours, and then hot-roll at 200-500°C to obtain a multi-layer composite sheet; 2. The multi-layer composite sheet obtained in step 1 is heat-treated at 500-700°C for 5-25 hours, Then heat treatment at 800-1000° C. for 5-25 hours to obtain a TiAl-based composite material plate.

[0011] In the first step of this embodiment, the hot pressing and rolling is carried out until the pressing amount of the plate reaches 20% to 80%.

[0012] When the deformation of the TiAl-based composite material plate prepared in this embodiment is 58-62%, the deformation of pure titanium is 56-64%, and the deformation of the aluminum-based composite material is 60-64%.

specific Embodiment approach 2

[0013] Specific embodiment 2: The difference between this embodiment and specific embodiment 1 is that in step 1, the number of alternately laminated layers of aluminum-based composite material plates and pure titanium plates is 2n+1 layers, n is a positive integer, and n≤50; The outermost layer is pure titanium plate. Other steps and parameters are the same as those in Embodiment 1.

[0014] The thickness of the TiAl-based composite material plate produced in this embodiment is 1-9 mm.

specific Embodiment approach 3

[0015] Embodiment 3: This embodiment differs from Embodiment 1 or Embodiment 2 in that the thickness of the aluminum-based composite material plate in step 1 is 0.05-0.3 mm. Other steps and parameters are the same as those in Embodiment 1 or Embodiment 2.

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Abstract

The invention provides a method for preparing a TiAl-based composite material plate, and relates to a method for preparing the composite material plate. The method solves the problems that TiAl-based alloy prepared by the prior process has poor uniformity and compactness in texture and serious internal oxidation phenomenon, and only block body TiAl-based composite material can be prepared by a composite strengthening and toughening method. The method of the invention comprises the following steps that: firstly, aluminum-based composite material plates and pure tatinium plates are alternately laminated and subjected to hot pressing and hot rolling to prepare a multilayer composite plate; and secondly, the multilayer composite plate is subjected to heat treatment to prepare the TiAl-based composite material plate. The TiAl-based composite material plate obtained by the method has good uniformity and compactness in texture, and has no internal oxidation; and compared with the block body TiAl-based composite material, the plate type TiAl-based composite material has convenient use and wide application field.

Description

technical field [0001] The invention relates to a preparation method of a 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. After decades of hard work, TiAl TiAl-based alloys have entered the stage of practical development. Castings and forgings of TiAl-based alloys are mainly used in aerospace engine casings and blades, while TiAl-based alloy sheets are expected to be directly used as structural materials in large quantities in aerospace and military fields. , It can also be used as a preformed material for superplastic forming, to prepare parts for aviation and aerospace engines, and wings and shells for ultra-high-speed aircraft. However, due to the intrinsic brittleness of TiAl-based alloys,...

Claims

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Application Information

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IPC IPC(8): B21B1/38B21B47/00C21D9/46C21D11/00B21C37/02B22F3/12B21C23/02
Inventor 张杰宋益标耿林
Owner HARBIN INST OF TECH
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