A kind of nickel base flux core solder, preparation method and application

Abstract

The invention discloses a nickel-based flux-cored solder, which comprises a flux core and a nickel-based alloy wrapping the flux core; the nickel-based alloy is a nickel-chromium alloy; and the flux core accounts for 30% of the total mass of the nickel-based flux-cored solder to 40%, the drug core comprises in terms of mass fraction: 13% to 24% NiSi 2 Powder, 19% to 33% GdF 3 powder, brazing flux powder is the balance; the invention also discloses the preparation method of the nickel-based cored solder and the brazing applied to ceramics and superalloys in the atmospheric environment; the invention has its own flux, which can be realized during brazing The automatic and synergistic addition of the brazing flux is achieved. In addition, the invention has good processing performance, reduces the brazing temperature during the application process, and improves the strength of the brazing joint.

Description

technical field

[0001] The invention relates to the technical field of flux-cored solder, in particular to a nickel-based flux-cored solder, a preparation method and an application. Background technique

[0002] Ceramics have excellent mechanical properties such as high hardness and high thermal strength, and have an extremely wide range of applications in many fields such as energy, chemical industry, machinery, aerospace, etc. However, ceramics are brittle and have poor impact and thermal shock resistance. It is made into complex structures, etc., which limits the application of its core functions. Superalloys have good plasticity and ductility, and have excellent machinability, but their properties in terms of high temperature resistance, corrosion resistance, and wear resistance can no longer meet the ever-increasing requirements for use. It can be seen that there is an obvious performance complementary relationship between ceramic materials and superalloys. In practica...

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