Self-brazing material for welding aluminum-copper member
A component and self-brazing technology, used in welding/cutting media/materials, welding media, welding equipment, etc., can solve the problems of not meeting engineering application requirements, low strength of solder brazing joints, and high melting point of solder, and achieve plasticity. Good, improve the mechanical properties, the effect of high brazing seam strength
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Embodiment 1
[0028] The proportioning of self-brazing filler metal of the present invention comprises 85% metal component and 15% fluoride component, and wherein metal component gets by weight percentage: 0.05%Hf, 0.1%Ge, 0.5%Ni, 1%Cu, 8%Si, the balance is Al; the fluoride is taken by weight percentage: 80%AlF 3 , 15%CsF, 5%KF;
[0029] The preparation method is:
[0030] In the first step, metal Ge and part of Al are smelted in an intermediate frequency furnace to form master alloy A1, the weight ratio of Ge and Al in the master alloy A1 is Al:Ge=95:5; high melting point metal Hf and part of Al are smelted into Master alloy A2, the weight ratio of Hf and Al in this master alloy A2 is Al:Hf=99:1;
[0031] In the second step, after melting the remaining Al raw materials in a vacuum furnace, the temperature of the molten aluminum in the furnace rises to 650-800°C (preferably 800°C), and then the raw material Si (crystal block) is added, and the temperature is kept for 10-20 minutes (prefer...
Embodiment 2
[0039] The proportioning of self-brazing filler metal of the present invention comprises 86% metal component and 14% fluoride component, and wherein metal component gets by weight percentage: 0.05%Hf, 0.1%Ge, 0.8%Ni, 1%Cu, 9%Si, the balance is Al; the fluoride is taken by weight percentage: 70%AlF 3 , 25%CsF, 5%KF.
Embodiment 3
[0041] The proportioning of self-brazing filler metal of the present invention comprises 87% metal component and 13% fluoride component, and wherein metal component gets by weight percentage: 0.15%Hf, 0.2%Ge, 0.8%Ni, 1.2%Cu, 10%Si, the balance is Al; fluoride is taken by weight percentage: 65%AlF 3 , 30%CsF, 5%KF.
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