Technological Performanca of Nickel-based Amorphous and Crystalline Brazing Filler Metals

In the high temperature vacuum brazing of 1Cr18Ni9Ti stainless steel, the technological performance of nickel-based amorphous brazing filler metal has been systematically investigated, and is compared with that of crystalline brazing filler metals, which have the same chemical composition as the amorphous one. The influence of the pre-crystallization treatment on the technological performance of the amorphous brazing filler metal has also been evaluated.The results indicated that the amorphous one has better wettability than the powder-form and ribbon-form crystalline one, and the pre-crystallization treatment can improve the wettability of the amorphous one. In addition, the results also show that the technological performance of brazing filler metal depends upon its chemical composition control, contaminant and gas content, as well as distribution uniformity of elements and microstructures in brazing filler metals.no matter the brazing filler matel is amorphous or crystalline. It is due to few contaminant and gas content as well as the extremely uniform distribution of elements and microstructures which results in the amorphous brazing filler matel having good technological performance.