Manganese-based flux-cored brazing filler metal as well as preparation method and application thereof

Abstract

The invention provides manganese-based flux-cored brazing filler metal as well as a preparation method and application thereof, and relates to the technical field of welding, in particular to brazing.The manganese-based flux-cored brazing filler metal comprises a manganese-based brazing filler metal outer skin and inner core brazing flux powder wrapped in the manganese-based brazing filler metalouter skin, wherein the manganese-based brazing filler metal outer skin is prepared from, by mass percent, 22.5%-30.0% of Ni, 20.0%-35.0% of Cu, 10.5%-15.5% of Zn, 2.0%-7.0% of Cr, 2.0%-5.0% of Co, 0.5%-1.0% of Sn, 0-0.3% of Fe and the balance Mn. The invention further provides a preparation method and application of the manganese-based flux-cored brazing filler metal. By designing components of the manganese-based brazing filler metal and improving the preparation method, the problem that the manganese-based brazing filler metal is difficult to form is solved, collaborative, precise and automatic use of the brazing filler metal and the brazing flux is achieved, and efficient application of the manganese-based brazing filler metal is promoted.

Description

technical field [0001] The invention relates to the field of welding technology, in particular to a manganese-based flux-cored solder and its preparation method and application. Background technique [0002] With the rapid development of my country's aerospace, weaponry, nuclear industry, precision machine tools, petroleum and chemical industries, brazing materials have been widely used in these fields. However, different application fields often have different individual requirements for solder. In some precision machining and manufacturing, materials represented by stainless steel and high-temperature alloys and their joints must meet higher application requirements. They must have excellent room temperature strength, impact resistance, oxidation resistance, and corrosion resistance. High temperature or dynamic load bearing capacity. Therefore, it is more urgent and important to choose which kind of solder and apply it in what kind of structure to meet the above-mentione...

AI Technical Summary

Problems solved by technology

Unfortunately, the popularization and application of manganese-based brazing materials, especially manganese-based cored brazing materials, is limited due to the difficulty in forming manganese-based brazing filler metals and the insufficient development of preparation technology and equipment.

In terms of the regulation and control of manganese-based solder brazing process parameters to improve the performance of brazed joints, Yang Guang from Sichuan University and Li Ning and others have conducted some research, but they only explored the influence of external temperature on the performance of manganese-based solder, and the judging factors Single, it is impossible to comprehensively control the solder brazing process, and reversely feed back to the improvement measures of the solder preparation process, and there is no comparison from the different components of the manganese-based solder itself, lacking the support of the alloying principle of the manganese-based solder, and it is impossible to base on each element Statistics and optimization of the single or coupled laws of manganese-based solder

[0007] The methods in the prior art cannot fully improve the process performance, brazing joint performance, work quality and efficiency of manganese-based solder, especially manganese-based flux-cored solder, and cannot effectively expand the scope of manganese-based solder and promote its Promote application

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