Brazing is one of the key basic technologies in the manufacturing industry

and the wide application of composite 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 reaction under the conditions of accurate positioning

constant temperature

timing and quantification. In this article

the classification 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 processing 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.