文章信息/Info

Title:

Review on Weldability of Ti₂AlNb-Based Alloy

作者:

鄒儉英1; 李洪宇2

（1．中國石油大學（華東）理學院，山東 青島 266580）
（2．山東科技大學機電學院，山東 青島 266590）

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)

關鍵詞:

Ti2AlNb基合金; 連接性; 連接方法; 接頭組織; Nb元素

Keywords:

Ti2AlNb�瞓ased alloy;  weldabity;  welding method;  joint microstructure;  Nb element

DOI:

10.7502/j.issn.1674-3962.201803012

文獻標志碼:

A

摘要:

Ti2AlNb基合金由于密度較低、室溫塑性良好及高溫性能優異，被認為是鎳基高溫合金的理想替代材料。該合金起源于Nb改良的Ti3Al基合金，Nb元素的大量添加勢必影響其自身性能及連接性。當前已有很多研究集中在Ti2AlNb基合金自身組織及力學性能上，為推進實用化進程，其連接性也愈發受到關注。結合自有研究及大量文獻資料，歸納總結了Ti2AlNb基合金的連接性問題，主要包括同材及異材連接、常用連接方法及Nb元素對其連接性的影響，評述側重于接頭組織、機械性能及焊縫形成機理。最后比較給出各種連接方法的優缺點，并對后續工作進行了展望。

Abstract:

With low density, good room temperature plasticity and superior high temperature performance, Ti2AlNb�瞓ased alloy is considered as ideal material instead of Ni�瞓ased superalloy. Ti2AlNb�瞓ased alloy derives from Nb�瞞odified Ti3Al�瞓ased 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�瞓ased alloy. In order to promote the industrial application, the weldabity of Ti2AlNb�瞓ased alloys has attracted more and more attention. Based on the authors�� results and a large number of literatures, the weldabity of Ti2AlNb�瞓ased 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.