Method for preparing titanium aluminium alloy sheet material from foil element by hot pressing diffusion transformation synthesis

A technology of titanium-aluminum alloy and diffusion phase change, which is applied in welding equipment, manufacturing tools, non-electric welding equipment, etc., can solve the problems of low density and poor strength of titanium-aluminum alloy plates, and achieve material cost reduction, high density, and The effect of increasing strength

Inactive Publication Date: 2006-02-08
HARBIN INST OF TECH
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In order to solve the problems of low density of the titanium-aluminum alloy plate produced by the existing method and poor strength in the length direction of the plate, the present

Method used

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  • Method for preparing titanium aluminium alloy sheet material from foil element by hot pressing diffusion transformation synthesis
  • Method for preparing titanium aluminium alloy sheet material from foil element by hot pressing diffusion transformation synthesis
  • Method for preparing titanium aluminium alloy sheet material from foil element by hot pressing diffusion transformation synthesis

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specific Embodiment approach 1

[0007] Embodiment 1: This embodiment is completed by the following steps: 1. Selecting titanium foil 1 and aluminum foil 2, and chemically and mechanically treating the surfaces of titanium foil 1 and aluminum foil 2; 2. Stacking titanium foil 1 and aluminum foil 2 at intervals , and the outer layer is wrapped with tantalum foil 3; 3. The composite material formed in the second step is placed on a vacuum hot press at a temperature of 500 ° C ~ 600 ° C for 3 to 5 hours in the first stage; 860 ° C ~ 890 ° C in the second stage, 7 ~10 hours; the third stage is 1200 ℃ ~ 1400 ℃, the temperature and holding time of 1 ~ 2 hours are continuously heat treated, and the axial pressure of 8 ~ 30MPa is applied to the plate in the above three stages; 4. After the third step The composite material formed afterwards is cooled to obtain a titanium-aluminum alloy plate blank; 5. The tantalum foil 3 wrapped on the surface of the titanium-aluminum alloy plate blank obtained in step 4 is ground wit...

specific Embodiment approach 2

[0008] Embodiment 2: In this embodiment, titanium foil 1 and aluminum foil 2 with a thickness of 5-30 μm are used, and the surfaces of the selected titanium foil 1 and aluminum foil 2 are cleaned with a solvent. It is de-folded, the above-mentioned cleaned and de-folded titanium foil 1 and aluminum foil 2 are stacked at intervals (N layer of titanium foil, N-1 layer of aluminum foil), and the outer layer is wrapped with tantalum foil 3 to prevent titanium foil 1, The aluminum foil 2 is pasted with the hot press during the heat treatment process, and the titanium foil 1 and aluminum foil 2 wrapped with the tantalum foil 3 are placed on the vacuum hot press, and the first stage is 500 ℃ ~ 600 ℃, 3 ~ 5 hours, and applied The heat treatment process under the condition of axial pressure of 8-30MPa, this process is to make titanium and aluminum undergo solid-state diffusion reaction in solid state, completely consume the pure aluminum (A1) area, and generate in the edge area of ​​tit...

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Abstract

The invention relates to a method for preparing alumino-titanium alloy sheet material by hot-pressed diffusion phase transformation, which pertains to metal heat treating domain. The invention comprises the following steps: (1) subjecting foil surface to chemical and mechanical treatment by titanium foil and aluminum foil; (2) folding titanium foil and aluminum foil by interval and wrapping the outer surface by tantalum foil; (3) subjecting it to continuous heat treatment on vacuum hot-pressing equipment; (4) cooling the plate blank; (5) grinding the surface of plate blank by grinder. The invention can produce alumino-titanium alloy board with highly dense chip histological structure and strength in the longitude direction.

Description

Technical field: [0001] The present invention relates to the field of metal heat treatment. Background technique: [0002] At present, the production technologies of titanium-aluminum alloy sheets include direct casting method, ingot forging method, powder metallurgy method and Ti-Al foil cold rolling-thermal diffusion synthesis method. As a new type of structural material, γ-TiAl based alloys have attracted extensive attention due to their low density, high elastic modulus, excellent high temperature strength, excellent corrosion resistance and good high temperature oxidation resistance. There will be a wide range of application prospects in modern high-speed aircraft. Among them, the application in the form of alloy sheet will be an important direction. However, at present, the titanium-aluminum alloy sheet prepared by the above method has the problems of low density and poor strength in the length direction of the sheet. Invention content: [0003] In order to solve ...

Claims

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Application Information

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IPC IPC(8): B23K20/02B23K20/24
Inventor 苏彦庆郭景杰丁宏升吴士平贾均傅恒志
Owner HARBIN INST OF TECH
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