高品质高可靠性钎料的技术发展及应用

结合国际高品质钎焊材料的研究现状和未来发展方向,总结了新型铝基钎料、银基钎料、铁基钎料及钎焊技术的国内外最新研究进展与应用成果.AlSiCu基低熔点钎料具有较高的强度和较好的耐腐蚀性能,特别是添加微量稀土元素后能通过变质作用降低表面张力和促进界面元素扩散,适用于高强度铝合金、铝-钢、钛合金的连接.新颖的纳米多层膜低温钎料及涂层制备技术取得一系列新的研究结果,与钎焊技术相结合具有良好的应用前景;特殊的钎焊新技术,如超声波辅助钎焊、等离子-激光复合钎焊为实现无钎剂和非真空环境下材料的液相连接提供了新的解决方案.

Development and application of high quality and high reliability brazing filler materials

Combining with international research status and development of high quality brazing filler materials,the latest progress of new type aluminum-based filler metals,silverbased filler metals and iron-based filler metals as well as brazing technology in China and abroad was summarized. Low-meltingpoint AlSiCu-based filler has high strength and good corrosion resistance, especially it can decrease the surface tension and promote diffusion near the interface after adding a small amount of rare earth elements,which is suitable for brazing high strength aluminum alloys,aluminum/steel and titanium alloys. In addition, novel low temperature nano-multilayer brazing filler and coating preparation technology have achieved a series of new research findings. Special new brazing technologies,including ultrasonic-assisted brazing, plasma-laser hybrid brazing, etc., provide new solutions for liquid phase bonding of materials under fluxless and non-vacuum conditions.