高铌TiAl合金复杂构件制造技术研究进展  

Progress on Preparation Technology of High-niobium TiAl Alloy Complex Components

作　　者：刘楠[1] 王建[1] 王建忠[1] Liu Nan;Wang Jian;Wang Jianzhong(State Key Laboratory for Porous Metals Materials,Northwest Institute for Nonferrous Metal Research,Xi’an 710016,China)

机构地区：[1]西北有色金属研究院金属多孔材料国家重点实验室,陕西西安710016

出　　处：《钛工业进展》2022年第3期41-48,共8页Titanium Industry Progress

基　　金：工信部基础研究项目(J2019-VII-0016);陕西省重点研发计划项目(2020GY-146)。

摘　　要：受材料本征脆性的限制,高铌TiAl合金复杂构件不适于通过机械加工获得,目前主要通过近净成形制备。分析了高铌TiAl合金的强化机制,并主要从铸造和增材制造2个方面介绍了高铌TiAl合金复杂构件加工技术的发展现状。熔模铸造TiAl合金技术成熟,已经可以实现批量化生产,但目前仍存在工艺复杂、模具制作难度大、成本高的问题。增材制造技术尤其是EBM技术取得了较快发展,高铌TiAl合金复杂构件的加工问题在一定程度上得到了解决,但产品依然存在表面粗糙度大、成形精度低等问题。Due to the limitation of brittleness,high-niobium TiAl alloy is not suitable for machining.TiAl alloy parts are mainly prepared by near net forming.The strengthening mechanism of high-niobium TiAl alloy was analyzed,and the development of machining technology of high-niobium TiAl alloy complex components was introduced mainly from casting and additive manufacturing.The technology of investment casting TiAl alloy is mature and can realize mass production,but there are still some problems such as complicated process,difficult mold making and high cost.With the development of additive manufacturing,especially electron beam melting(EBM),the machining problems of complex components have been alleviated,but the products still have the problems of large surface roughness and low forming accuracy.

关 键 词：高铌TIAL合金 复杂构件 铸造 增材制造 电子束选区熔化 

分 类 号：TG146.23[一般工业技术—材料科学与工程]