A kind of nickel base flux core solder, preparation method and application
A flux-cored and nickel-based technology is applied in the field of nickel-based flux-cored brazing filler metals, and can solve the problems of low brazing efficiency, low brazing joint strength, and poor processability of nickel-based brazing filler metals. Improve the brazing efficiency and the effect of automatic and precise addition
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Embodiment 1
[0034] The present embodiment discloses a nickel-based flux-cored solder, comprising a flux core and a nickel-based alloy surrounding the flux core;
[0035] The nickel-based alloy is a nickel-chromium alloy;
[0036] Described drug core includes according to mass fraction:
[0037] NiSi 2 Powder 24%, GdF 3 Powder 19%, brazing flux powder 57%;
[0038] The brazing flux powder includes boric acid and borax, wherein the mass ratio of boric acid and borax is 3:1.
[0039] The flux core accounts for 35% of the total mass of the nickel-based flux cored solder.
[0040] The nickel-chromium alloy strip used in the present invention has a width of 15 mm and a thickness of 0.6 mm, and includes: Cr20% and Ni80% according to the mass fraction.
[0041] The preparation method of nickel-based flux-cored solder in this embodiment includes the following steps:
[0042] Step 1, selection and preparation of raw materials: take the nickel-chromium alloy strip, prepare the quality of each ...
Embodiment 2
[0046] The main difference between this embodiment and Embodiment 1 is:
[0047] The chemical composition of the core and its mass percentage are: NiSi 2 Powder 17%, GdF 3 33% of the powder, 50% of the brazing flux powder; the flux core accounts for 40% of the total mass of the nickel-based flux cored solder.
Embodiment 3
[0049] The main difference between this embodiment and Embodiment 1 is:
[0050]The chemical composition of the core and its mass percentage are: NiSi 2 Powder 13%, GdF 3 The powder is 30%, and the brazing flux powder is 57%; the flux core accounts for 30% of the total mass of the nickel-based flux core brazing filler metal.
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