摘要
主要研究在TIG电弧加热条件下,使用不同焊接工艺参数对AlSi5钎料在镀锌钢板上的润湿与铺展及AlSi5钎料/镀锌钢板界面行为进行分析。用扫描电镜(SEM)观察钎料及界面层的微观形貌,测量界面层的厚度,并用能谱仪(EDAX)分析界面成分分布。试验结果表明,随着燃弧时间和电流的增加,AlSi5钎料在镀锌钢板上的润湿角逐渐减小和铺展面积逐渐增加。随着燃弧时间的增加,界面反应层的厚度逐渐增加,随着燃弧电流的增加界面反应层的厚度呈现先增加后减小的趋势,并发现当燃弧电流为交流80 A,燃弧时间为4 s时,界面层生成金属间化合物Fe2Al5,深入到钎料内部的为金属间化合物FeAl3。
Effect of wettability and spreadability of AlSi5 filler and analysis interfacial behavior of AlSi5 filler and galvanized steel with different TIG welding-brazing parameters were studied.Microstructure and element distribution AlSi5 filler and interface layer were studied by SEM and EDAX.The results showed that with the increase of arcing time and current,the wetting angle decreased and the spreading area increased.With the increase of acing time,the thickness of interface reaction layer increased.With the increase of arcing current,the thickness of interface layer increased first and then decreased.When the arcing current was AC 80 A and arcing time was 4 s,the intermetallic compound Fe2Al5was formed in the interface layer and FeAl3was formed inside of the filler.
出处
《焊接技术》
北大核心
2014年第3期7-9,5,共3页
Welding Technology
