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 pollution 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: 2011-09-21
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 sheet in this embodiment is realized by the following steps: 1. Using pure titanium particles with a diameter of 50-150 μm to directly pile them into a steel mold to obtain a porous titanium preform; 2. Al-Si The alloy ingot is cut into blocks 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 10 ~ 20 ℃ / The temperature is increased to 590~640℃ at the speed of min and kept for 30~120min, then pressurized to 5~30MPa, maintained under pressure for 10~30min, and then cooled to room temperature under pressure to obtain 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 to 3 mm; 4. The Ti-Al bimetallic composite plate is placed in a vacuum hot pressing sintering furnace at a ...

specific Embodiment approach 2

[0013] Embodiment 2: The difference between this embodiment and Embodiment 1 is that in step 1, pure titanium particles with a diameter of 60-140 μm are used. Other steps and parameters are the same as in the first embodiment.

specific Embodiment approach 3

[0014] Embodiment 3: The difference between this embodiment and Embodiment 1 is that in step 1, pure titanium particles with a diameter of 80 μm are used. Other steps and parameters are the same as in the first embodiment.

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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 arrangedon 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 preparation method of an alloy plate. Background technique [0002] TiAl-based alloys are highly competitive materials for heat-resistant structural parts for aerospace, aviation and automobiles due to their light weight, high strength, outstanding creep resistance and oxidation resistance. With the development of the practical process of TiAl-based alloys, the requirements for preparing TiAl-based alloy sheets are becoming more and more urgent. However, TiAl-based alloys have low plasticity and poor processing performance, so the preparation of TiAl-based alloy sheets is very difficult. [0003] At present, most of TiAl-based alloy sheets 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 hot pressing, hot extrusion, hot isosta...

Claims

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Application Information

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Patent Type & Authority Patents(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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