Method for preparing Ti2AlNb alloy by using vacuum pressure infiltration method

A technology of vacuum pressure infiltration and alloying, applied in the field of preparation of Ti2AlNb alloy, can solve the problem of uneven distribution of Nb and Al elements, and achieve the effect of low production cost, simple process and huge market prospect.
CN103710554AInactive Publication Date: 2014-04-09HARBIN INST OF TECH
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
HARBIN INST OF TECH
Publication Date
2014-04-09
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a method for preparing a Ti2AlNb alloy by using a vacuum pressure infiltration method and a method for preparing the Ti2AlNb alloy. The method disclosed by the invention is used for solving the problems of non-uniform distribution of elements such as Nb and Al and shrinkage cavity, pores and inclusion of the Ti2AlNb alloy in a conventional cast melting method for preparing the Ti2AlNb alloy are solved. The method comprises the following steps: 1, weighing 50.1-56.5 percent of pure Ti powder, 22.5-24.4 percent of Nb powder and 21.0-25.5 percent of Al-Y rare earth alloy block; 2, performing low-energy ball milling on pure titanium particles and niobium powder; 3, putting the rare earth aluminum alloy Al-Y block on the composite titanium and niobium powder, performing infiltration, so as to enable the melted Al-Y alloy to be fully penetrated into the composite titanium and niobium powder, reducing the pressure, performing heat preservation and pressure maintaining, and reacting and sintering to obtain the Ti2AlNb alloy. The method is simple in process, easy to operate, short in preparation period and low in manufacturing cost.
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Description

technical field

[0001] The present invention relates to a kind of Ti 2 Preparation method of AlNb alloy. Background technique

[0002] Ti 2 AlNb alloy has the advantages of low density, excellent fracture toughness, specific strength and specific stiffness at high temperature, high temperature creep resistance, oxidation resistance and low thermal expansion coefficient, and is considered to be ideal for aero-engines to achieve performance improvement through structural weight reduction. Light specific gravity high temperature structural material, following γ-TiAl, α 2 After -Ti3Al-based alloys, another research hotspot.

[0003] Usually, Ti 2 AlNb alloy adopts casting melting method. During the smelting process, due to the large proportion of Nb element and its high melting point, it is easy to segregate. On the contrary, the Al element has a small proportion and low melting point and is easy to volatilize, resulting in inaccurate composition and uneven distribution of ...

Claims

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