(1. 中南大學(xué) 材料科學(xué)與工程學(xué)院，長沙 410083;
2. 日本國立電氣通信大學(xué) 機(jī)械工程系, Tokyo 182-8585)
摘 要: 采用掃描電鏡技術(shù)觀察和分析了爆炸復(fù)合銅/鋼板浸鋁鑄件的鋁/鋼界面組織， 用面掃描探明了界面組織中主要成份的分布， 結(jié)合粉末樣品的X射線譜確定了界面組織的相組成， 用拉剪方法測得了界面的結(jié)合強(qiáng)度。 結(jié)果表明： 爆覆在鋼板上的銅全部溶入鋁液中， 界面上出現(xiàn)了Fe2Al5與FeAl3兩層連續(xù)的中間化合物； 同時(shí)界面附近還出現(xiàn)了FeAl3顆粒相， 這種顆粒相的形成可能和浸鋁用鋼板的爆炸焊接組織有關(guān)。 界面的結(jié)合強(qiáng)度為80.5MPa。
關(guān)鍵字: 爆炸焊接； 金屬間化合物； 鋁/鋼界面； 擴(kuò)散； 鑄件
inserting explosively welded Cu-steel plate into aluminium melt
YANG Xu-yue2, ZHOU Zhuo-ping1
（1. School of Materials Science and Engineering，
Central South University，Changsha 410083， China;
2. Mechanical Department, University of Electro-Communications, Tokyo 182-8585, Japan）
Abstract:SEM was used to observe the microstructure of the Al-steel interface in the ingot which was produced by inserting an explosively welded Cu-steel plate into the aluminium melt. The face-scanning of elements was also applied to investigate the concentration distribution of major elements in the interfacial microstructure, and the different phases were confirmed by the means of powder XRD. It is found that the copper layer explosively welded on the steel plate dissolutes in the aluminium melt totally. There are two continuous layers in the interface: the one adjacent to the steel base is Fe2Al5, and another is FeAl3. Particles near the interface in the Al base are also found and defined as FeAl3 and its formation may be related to the explosively welded microstructure of the steel plate inserted in the aluminium melt. The bonding strength is about 80.5MPa from tensile-shear test.
Key words: explosive welding; intermetallic compound; Al-steel interface; diffusion; casting
