文章信息/Info

Title:

Research Progress of Ti2AlNb Based Alloy and Its Additive Manufacturing Technology

文章編號:

1674-3962(2022)08-0645-08

作者:

霍俊美1; 2; 何博1; 2

（1. 上海工程技術(shù)大學(xué) 高溫合金精密成型研究中心，上海 201620）（2.上海工程技術(shù)大學(xué)材料工程學(xué)院，上海 201620）

Author(s):

HUO Junmei1; 2; HE Bo1; 2

(1. Research Center of High-Temperature Alloy Precision Forming，Shanghai University of Engineering Science， Shanghai 201620，China) (2. School of Materials Engineering，Shanghai University of Engineering Science，Shanghai 201620，China)

關(guān)鍵詞:

Ti2AlNb基合金; 增材制造技術(shù); 微觀組織; 力學(xué)性能; 熱處理

Keywords:

Ti2AlNb based alloy;  additive manufacturing technology;  microstructure;  mechanical properties;  heat treatment

分類號:

TG146.2

DOI:

10.7502/j.issn.1674-3962.202101011

文獻(xiàn)標(biāo)志碼:

A

摘要:

Ti2AlNb基合金具有高比強(qiáng)度、低彈性模量和熱膨脹系數(shù)、優(yōu)異的抗蠕變性能和高溫抗氧化性能，在航空航天領(lǐng)域具有非常廣闊的應(yīng)用前景，有望部分替代鎳基高溫合金用于制備航空發(fā)動(dòng)機(jī)高溫結(jié)構(gòu)件，實(shí)現(xiàn)發(fā)動(dòng)機(jī)的大幅度減重，顯著提升發(fā)動(dòng)機(jī)的推重比。Ti2AlNb基合金加工性能差，利用傳統(tǒng)成形工藝制備鈦鋁合金材料零部件面臨低效率、高成本等一系列問題，嚴(yán)重制約其工程應(yīng)用。近年來，增材制造技術(shù)因其高效率、低成本、凈成形等優(yōu)點(diǎn)，在制備鈦鋁合金方面極具優(yōu)勢和潛力，有望克服鈦鋁合金的加工難點(diǎn)并顯著提升其力學(xué)性能。綜述了Ti2AlNb基合金的基本特性及其增材制造技術(shù)的研究進(jìn)展，指出了增材制造Ti2AlNb基合金現(xiàn)存的問題與不足，展望了增材制造Ti2AlNb基合金的未來發(fā)展趨勢和應(yīng)用前景。

Abstract:

Ti2AlNb based alloy has a combination of advantages, including high specific strength, low elastic modulus and coefficient of thermal expansion, excellent creep resistance and high temperature oxidation resistance, which has a very broad application prospect in the aerospace field and is expected to partially replace nickel based superalloy in the preparation of aeroengine high temperature structural parts, in order to greatly reduce the engine weight and significantly improve the thrust weight ratio of the engine. However, Ti2AlNb based alloy has poor processing performance and the traditional forming processes for preparing Ti2AlNb based alloy parts face a series of problems such as low efficiency and high cost, which significantly limits their engineering applications. In recent years, additive manufacturing technology has great advantages and potential in the preparation of titanium aluminum alloys owning to its high efficiency, low cost，net-shape forming and other merits, which is expected to overcome the processing difficulties and significantly improve the mechanical properties of Ti2AlNb based alloy. In this paper, the basic characteristics of Ti2AlNb based alloy and the research progress of parts fabricated by additive manufacturing technology are reviewed. The existing problems and shortcomings of Ti2AlNb based alloy additive manufacturing are pointed out. Finally, the future development trend and application prospect of Ti2AlNb based alloy additive manufacturing are prospected.