钎料钎剂复合型绿色钎料研究进展

钎焊是制造业的关键基础技术之一,复合钎料是践行钎焊绿色化、自动化的重要手段,与传统钎料相比,复合钎料可实现钎剂定位—定温—定时—定量精准反应.综述了国内外钎料钎剂复合型钎料的分类和特点,分析了药芯钎料、药皮钎料、粉末合成钎料等的制备技术、成分设计和典型应用,指出了目前研究的不足,并对复合钎料未来的发展方向提出了建议:借...

Research development of composite green brazing materials of filler metal and flux

Brazing is one of the key basic technologies in the manufacturing industry,and the wide application of comp-osite brazing filler metals is an important method to realize green and automatic brazing.Comparing with the traditional filler metal,composite filler metal can achieve the precise flux reac-tion under the conditions of accurate positioning,constant tem-perature,timing and quantification.In this article,the classifi-cation and characteristics of brazing filler metals at home and abroad are reviewed,and the preparation technology,compo-sition design and typical applications of flux-cored brazing filler metals,flux-coated brazing filler metals,brazing filler metals prepared by powder are analyzed.The shortcomings of current research are pointed out,and suggestions for the future development of the composite filler metal are put forward.For example,with the aid of materials genome technology,developing low-Ag and Cd-free brazing filler metal with high activity and low emissions;continuously innovating the proce-ssing and preparation technology of composite brazing filler metals,such as friction stir processing and electromagnetic plastic technology;developing continuous plate-packed and barrel-packed flux-cored composite brazing filler metals with excellent surface quality to replace traditional manual strip brazing filler metals.