Effects of Si additions on intermetallic compound layer of aluminum-steel TIG welding-brazing joint
Effects of Si additions on intermetallic compound layer of aluminum-steel TIG welding-brazing joint
复制标题
Si添加量对铝-钢TIG焊-钎焊接头金属间化合物层的影响
DOI：
10.1016/j.jallcom.2009.08.084
复制
发表时间：
2009-11-20
影响因子：
6.2
通讯作者：
Fan, C. L.
中科院分区：
文献类型：
--
作者：
Song, J. L.;Lin, S. B.;Fan, C. L.
采用1100纯Al、4043 AlSi5和4047 AlSi12填充金属，对5A06铝合金和AISI 321不锈钢异种金属进行了TIG焊钎焊，成功地进行了对接。在填充金属中添加Si对抑制IMC层的生长有很大的作用。最小化它的厚度。与纯铝的接合界面由铝侧的theta-FeAl3和钢侧的eta-Fe2Al5组成，与Al-Si填充金属的接合界面由铝侧的tau(5)-Al7.2Fe1.8Si和钢侧的theta-Fe(Al,Si)(3)组成。当Si添加量为5 wt.%时，IMC层的力学性能最佳，接头的抗拉强度达到125.2 MPa。IMC层的生长机制受铁原子在液体中的溶解和扩散控制。同时，Si原子在界面中聚集，参与了IMC层的形成。(C) 2009 Elsevier B.V.版权所有
Dissimilar metals of 5A06 aluminum alloy and AISI 321 stainless steel were butt joined successfully by TIG welding-brazing with 1100 pure Al, 4043 AlSi5 and 4047 AlSi12 filler metals. Si additions in the filler metal have great effects in preventing the growth of the IMC layer. and minimizing its thickness. The joint interface with pure aluminum consists of the theta-FeAl3 in aluminum side and eta-Fe2Al5 in steel side, while the interfaces with Al-Si filler metals are the tau(5)-Al7.2Fe1.8Si in aluminum side and theta-Fe(Al,Si)(3) in steel side. And with 5 wt.% of Si additions, the IMC layer has the optimum mechanical properties, and the tensile strength of the joint reaches 125.2 MPa. The growth mechanism of the IMC layers is controlled by the dissolution and diffusion of Fe atoms in the liquid. At the same time, Si atoms aggregate in the interface and participate the IMC layer's formation. (C) 2009 Elsevier B.V. All rights reserved.