Al-Si-Cu-Zn-Sn-Ni aluminum-based brazing filler metal and preparation method thereof
A technology of al-si-cu-zn-sn-ni and brazing filler metal, applied in the field of Al-Si-Cu-Zn-Sn-Ni aluminum-based brazing filler metal and its preparation, achieves strong surface activity, is not easily corroded, The effect of increasing strength
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Embodiment 1
[0036] 1. The composition of Al-Si-Cu-Zn-Sn-Ni aluminum-based solder:
[0037] In terms of mass percentage, the composition of the aluminum-based solder in the present invention is Si: 11%, Cu: 10%, Zn: 9%, Sn: 5%, Ni: 3%, Ce: 0.2%, Sr: 0.05 %, Zr: 0.08%, Al balance. Alloy degree 38.33%.
[0038] 2. Preparation method:
[0039] 1) Weighing: Weigh each component according to the composition of the fiber material, among which Al is added in the form of pure metal, and the elements Si, Cu, Zn, Sn, Ni, Ce, Sr, and Zr are respectively added in the form of Al-30Si, Al-50Cu, Al - 50%Zn, Al-30%Sn, Al-10Ni, and Al-20Ce, Al-10Sr, Al-5Zr master alloys are added.
[0040] 2) Melting: put pure aluminum into graphite crucible melting furnace, add aluminum flux (mixed dry powder of KCl and NaCl, wherein KCl:NaCl=1:1, the amount added is 1% of the total weight of pure aluminum) to cover, and heat to 800 After melting at ℃, remove slag, then add Al-Si, Al-Cu and Al-Ni master alloys in prop...
Embodiment 2
[0045] 1. The composition of aluminum-based solder:
[0046] The difference between this example and Example 1 is that the mass percentage components of aluminum-based solder are Si: 11%, Cu: 10%, Zn: 10%, Sn: 4%, Ni: 2.5%, Ce: 0.15% , Sr: 0.06%, Zr: 0.1%, Al balance. The alloy degree is 37.81%.
[0047] Two: Preparation method:
[0048] The difference between this example and Example 1 is that the first refining is refining at 800°C for 10 minutes, and the second refining is refining at 780°C for 6 minutes and standing for 6 minutes.
[0049] The above-mentioned aluminum-base brazing filler metal wire that makes above is carried out experimental detection, obtains each performance index as:
[0050] The liquidus temperature is 518.3°C, the solidus temperature is 482.6°C; the tensile strength of the solder itself is σ b =126MP; when the base metal is 7003 and the flux is QJ202, the brazing temperature is 530-560°C, the shear strength of the weld is 133Mpa, and the impact tou...
Embodiment 3
[0052] 1. The composition of aluminum-based solder:
[0053] The difference between this example and Example 1 is that the mass percentage components of aluminum-based solder are Si: 10%, Cu: 10%, Zn: 8%, Sn: 3%, Ni: 2%, Ce: 0.1% , Sr: 0.05%, Zr: 0.07%, Al balance. The alloy degree is 33.22%.
[0054] Two: Preparation method:
[0055] The difference between this example and Example 1 is that the first refining is refining at 760° C. for 15 minutes, and the second refining is refining at 750° C. for 5 minutes and standing for 5 minutes.
[0056] The above-mentioned aluminum-based brazing filler metal wire that is made is carried out experimental detection, and the various performance indicators that obtain are:
[0057] The liquidus temperature is 521.8°C, the solidus temperature is 486.2°C; the tensile strength of the solder itself is σ b =120MPa; when the base metal is 7003 and the flux is QJ202, the brazing temperature is 530-560°C, the shear strength of the weld is 135M...
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