(1. 蘭州理工大學(xué) 省部共建有色金屬先進(jìn)加工與再利用國(guó)家重點(diǎn)實(shí)驗(yàn)室，蘭州 730050；
2. 中國(guó)航空制造技術(shù)研究院 航空焊接與連接技術(shù)航空科技重點(diǎn)實(shí)驗(yàn)室，北京 100024)
摘 要: 研究了6082鋁合金和TC4鈦合金分別添加釬料鋅和鎳下的攪拌摩擦釬焊(FSB)搭接接頭微觀組織及焊后熱處理后接頭界面金屬間化合物(IMC)的生成種類和先后順序以及生長(zhǎng)動(dòng)力學(xué)模型。研究表明：添加釬料鋅時(shí)，界面金屬間化合物主要由AlZn、TiAl、TiAl2、TiAl3組成，先后順序?yàn)門(mén)iAl2→TiAl3→TiAl→AlZn，并獲得了界面IMC層的生長(zhǎng)動(dòng)力學(xué)模型為；添加釬料鎳時(shí)，界面金屬間化合物層主要由TiNi、Al3Ni2、Ti3Al和TiAl組成，先后順序?yàn)?76 K以下，Ti-Ni-Al焊接界面金屬間化合物形成的順序是Al3Ni2→TiNi→TiAl→Ti3Al，776 K以上時(shí)生成順序?yàn)锳l3Ni2→TiNi→Ti3Al→TiAl，并獲得了界面IMC層的生長(zhǎng)動(dòng)力學(xué)模型。界面IMC層的厚度均隨著溫度的提高或保溫時(shí)間的延長(zhǎng)而增加。添加鋅的接頭的剪切強(qiáng)度由未熱處理時(shí)的154 MPa提高到194 MPa，而添加釬料鎳的接頭由142 MPa提高至166 MPa。
關(guān)鍵字: 鈦/鋁異種金屬；攪拌摩擦釬焊；釬料；金屬間化合物；熱力學(xué)與動(dòng)力學(xué)
（1. State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals, Lanzhou University of Technology, Lanzhou 730050, China;
2. Aeronautical Key Laboratory for Welding and Joining Technologies, AVIC Manufacturing Technology Institute AECC, Beijing 100024, China）
Abstract:The paper investigated the microstructure of the friction stir brazing dissimilar joints between 6082 aluminum alloy and TC4 titanium alloy by adding the filler Zn and Ni and the type and formation sequence and kinetic growth model of IMCs during post welding annealing treatment. The results show that the IMC layer consisted of AlZn, TiAl, TiAl2 and TiAl3 and the formation sequence is TiAl2→TiAl3→TiAl→AlZn on the filler Zn. The IMC layer consisted TiNi, Al3Ni2, Ti3Al and TiAl and the formation sequence is Al3Ni2→TiNi→TiAl→Ti3Al below 776 K and Al3Ni2→ TiNi→TiAl→Ti3Al above 776 K on the filler Ni. The growth kinetic models are obtained. The thickness of the IMC layer increases with increasing the annealing temperature and/or holding time. The shearing strength increases from 154MPa during unheat-treatment to 194 MPa by adding filler Zn, and from 142 MPa to 166 MPa by adding filler Ni.
Key words: Ti/Al dissimilar metal; friction stir brazing; brazing filler; inter-metallic compounds; thermodynamics and formation kinetics
