Ti2AlNb particle plasticized TiAl-based composite material and preparation method thereof

A composite material and particle technology, used in additive processing, additive manufacturing, etc., to achieve good creep resistance, high high temperature strength, and improved formability and workability.

Active Publication Date: 2021-06-18
AVIC BEIJING INST OF AERONAUTICAL MATERIALS
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  • Abstract
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Problems solved by technology

At present, adding Cr, V, Mo and other alloys to TiAl-based alloys can significantly improve hot workability, superplasticity and high temperature oxidation resistance, but it still cannot fundamentally solve the shortcomings of low room temperature plasticity.

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  • Ti2AlNb particle plasticized TiAl-based composite material and preparation method thereof

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Embodiment Construction

[0032] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Apparently, the described embodiments are some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0033] Raw material components for TiAl-based composites 1

[0034] Raw materials for laser direct deposition in this embodiment: the particle size of TiAl powder is 45~106 microns, Ti 2 The particle size of AlNb powder is 53-150 microns, the volume percentage of TiAl powder in the raw material is 99.0%, Ti 2 The volume percentage of AlNb powder is 1.0%. The TiAl alloy powder consists of about 48.0% Ti, 48.0% Al, 2.0% Cr and 2.0% Nb and 0.06% C in atomic percent. Ti 2 The AlNb alloy powder consisted of about 53.0% Ti, 22.0% Al and 25.0% Nb and 0.05%...

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Abstract

The invention belongs to the technical field of new material design and additive manufacturing. The invention provides a Ti2AlNb particle plasticized TiAl-based composite material and a preparation method thereof. The composite material is composed of, by volume, 1.0%-10.0% of Ti2AlNb and 90.0%-99.0% of TiAl alloy, wherein the TiAl alloy is composed of, by atomic percent, 45%-48.5% of Ti, 45%-48.5% of Al and 3%-5% of other alloy elements, the alloy elements are the combination of 2-4 elements of Cr, Nb, V, Mn, Mo and C, and the atomic percent of C in the TiAl alloy is smaller than or equal to 0.15%. The preparation method comprises the following steps of carrying out high-temperature heating treatment on a substrate before forming; and preparing by adopting a synchronous high-temperature heating and electromagnetic stirring assisted laser direct deposition method; According to the TiAl-based composite material and the preparation method, grain refinement of the material is achieved, the room-temperature plasticity is greatly improved, and the TiAl-based composite material and the preparation method have important significance in promoting development and application of the TiAl-based material in engine parts.

Description

technical field [0001] The invention belongs to the technical field of new material design and additive manufacturing. involving a Ti 2 TiAl-based composite material plasticized with AlNb particles and its preparation process. Background technique [0002] TiAl-based alloy is a new type of lightweight high-temperature structural material. It not only has low density, but also has excellent high-temperature performance. It can work stably and reliably at high temperatures of 760°C to 850°C. Therefore, TiAl alloys will replace some nickel-based superalloys in the new generation of aerospace engines, and are used in the manufacture of hot end components such as combustor swirlers, casings, high-pressure compressor blades and low-pressure turbine blades. However, TiAl-based alloys are mainly composed of the γ-TiAl phase matrix and the second phase α 2 -Ti 3 Al phase composition, these two phases are intermetallic compounds, the strong bonding force between Ti-Al endows TiAl-...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/04C22C14/00B22F10/28B22F9/04B33Y10/00
CPCC22C1/0458C22C14/00B22F9/04B33Y10/00B22F2009/043
Inventor 秦仁耀张国会孙兵兵梁家誉熊华平
Owner AVIC BEIJING INST OF AERONAUTICAL MATERIALS
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