Preparing method of Ti Al-based alloy plate

A technology based on alloys and plates, which is applied in the field of preparation of alloy plates, can solve the problems of interstitial element contamination such as impurities such as oxygen, coarse grain structure, difficult processing and forming, etc., to avoid defects in as-cast structure, fine grain structure, Ease of plastic processing

Inactive Publication Date: 2010-06-30
HARBIN INST OF TECH
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Problems solved by technology

[0004] The present invention solves the problem that the existing TiAl-based alloys are difficult to process and shape at room temperature; the TiAl-based alloy plates prepared by powder metallurgy technology are easily polluted by interstitial elements and contain many impurities such as oxygen; adopt ingot metallurgy technology and precision The preparation of TiAl-based alloy sheet by casting process has the problems of coarse grain structure, low strength and loose structure, and a preparation method of TiAl-based alloy sheet is provided

Method used

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  • Preparing method of Ti Al-based alloy plate
  • Preparing method of Ti Al-based alloy plate

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specific Embodiment approach 1

[0009] Specific Embodiment 1: The preparation method of the TiAl-based alloy plate in this embodiment is realized according to the following steps: 1. Use pure titanium particles with a diameter of 50-150 μm to be directly deposited in a steel mold to form a porous titanium preform; 2. Al-Si The alloy ingot is wire-cut into a block with the shape and size of the steel mold, and then placed on the porous titanium preform, and then placed in a vacuum hot-pressing sintering furnace, vacuumed to 0.001-0.01Pa, and then heated at 10-20°C / Raise the temperature to 590-640°C at a rate of 1 min and keep it warm for 30-120 min, then pressurize to 5-30 MPa, keep the pressure for 10-30 min, and then keep the pressure and cool to room temperature to obtain a Ti-Al bimetallic composite; 3. Ti-Al The bimetallic composite body is cold-rolled to obtain a Ti-Al bimetallic composite plate with a thickness of 1-3mm; 4. The Ti-Al bimetallic composite plate is placed in a vacuum hot-pressing sinteri...

specific Embodiment approach 2

[0013] Embodiment 2: This embodiment differs from Embodiment 1 in that step 1 uses pure titanium particles with a diameter of 60-140 μm. Other steps and parameters are the same as those in Embodiment 1.

specific Embodiment approach 3

[0014] Embodiment 3: This embodiment differs from Embodiment 1 in that step 1 uses pure titanium particles with a diameter of 80 μm. Other steps and parameters are the same as those in Embodiment 1.

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Abstract

The present invention discloses a preparing method of a Ti Al-based alloy plate, which relates to a preparing method of an alloy plate. The present invention solves the problems that the existing Ti Al-based alloy is not easy to process into to form at room temperature; Ti Al-based alloy plates prepared by powder metallurgy technique are easy to pollute by interstitial elements with many impurities containing oxygen; and Ti Al-based alloy plates prepared by casting metallurgy technique and precision casting art have the disadvantages of crude grain structure, low strength and loose structure. In the method, pure titanium grains are piled in a steel module to obtain a multi-hole titanium prefabricated body; an Al-Si alloy casting wire is cut into block bodies; the block bodies are arranged on the multi-hole titanium prefabricated body to be sintered to obtain a Ti - Al double alloy complex body; the Ti - Al double alloy complex body is coldrolled to obtain a Ti - Al double alloy complex plate; the Ti - Al double alloy complex plate is sintered again, and is cooled to room temperature; the Ti - Al double alloy complex plate is retreated from the steel module to obtain the Ti Al-based alloy plate. The Ti Al-based alloy is processed to be formed at the room temperature, so the Ti Al-based alloy plate has the advantages of compaction, even structure, thin grain structure and high strength, and the negative effect of oxidation and impurities is reduced.

Description

technical field [0001] The invention relates to a method for preparing alloy plates. Background technique [0002] Due to its light weight, high strength, outstanding creep resistance and oxidation resistance, TiAl-based alloys have become very competitive materials for heat-resistant structural parts in aerospace, aviation and automobiles. With the development of the practical application of TiAl-based alloys, the requirements for preparing TiAl-based alloy sheets are becoming more and more urgent. However, TiAl-based alloys have very low plasticity and poor processing performance, so the preparation of TiAl-based alloy sheets is very difficult. [0003] At present, most of the TiAl-based alloy plates are formed by ingot metallurgy technology (such as extrusion, forging, rolling, sheet forming), powder metallurgy technology (including molding and extrusion sintering) and precision casting technology. Powder metallurgy technology generally requires the powder to be formed b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F3/16B21B1/38B21B37/48B21B37/46
Inventor 耿林梁策李爱滨李峰
Owner HARBIN INST OF TECH
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