Ti<sub>2</sub>AlNb基合金连接性问题综述-中国材料进展

文章信息/Info

Author(s):: ZOU Jianying 1; LI Hongyu2; （1．College of Science, China University of Petroleum, Qingdao 266580, China）
（2．College of Mechanical and Electronic Engineering, Shandong University of Science and Technology, Qingdao 266590, China)

Keywords:: Ti2AlNbbased alloy; weldabity; welding method; joint microstructure; Nb element

摘要:: Ti2AlNb基合金由于密度较低、室温塑性良好及高温性能优异，被认为是镍基高温合金的理想替代材料。该合金起源于Nb改良的Ti3Al基合金，Nb元素的大量添加势必影响其自身性能及连接性。当前已有很多研究集中在Ti2AlNb基合金自身组织及力学性能上，为推进实用化进程，其连接性也愈发受到关注。结合自有研究及大量文献资料，归纳总结了Ti2AlNb基合金的连接性问题，主要包括同材及异材连接、常用连接方法及Nb元素对其连接性的影响，评述侧重于接头组织、机械性能及焊缝形成机理。最后比较给出各种连接方法的优缺点，并对后续工作进行了展望。

Abstract:: With low density, good room temperature plasticity and superior high temperature performance, Ti2AlNbbased alloy is considered as ideal material instead of Nibased superalloy. Ti2AlNbbased alloy derives from Nbmodified Ti3Albased alloy, and the large amount of Nb element will inevitably affect its own property and weldabity. Now, many studies have focused on the microstructure and mechanical property of Ti2AlNbbased alloy. In order to promote the industrial application, the weldabity of Ti2AlNbbased alloys has attracted more and more attention. Based on the authors results and a large number of literatures, the weldabity of Ti2AlNbbased alloy is summarized, including welding to itself and to other materials, as well as the usual welding methods and the influence of Nb element on its weldabity. The emphasis of the review is joint microstructure, mechanical properties and weld formation mechanism. Finally, the advantages and disadvantages of various welding methods are summarized, and the future work is prospected.