Al-Fe-Ni-RE aluminum alloy, and preparation method and power cable thereof
An al-fe-ni-re, power cable technology, applied in the field of alloys, can solve the problems of poor fatigue resistance, quality problems, affecting the service life of aluminum alloy materials, etc.
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[0050] The present invention also provides a method for preparing Al-Fe-Ni-RE aluminum alloy, including the following steps:
[0051] a) Casting the following raw materials to obtain an aluminum alloy ingot: 0.01~1.6wt% Fe, 0.001~0.3wt% Cu, 0.001~0.3wt% Mg, 0.001~0.3wt% Co, 0.001~0.2 wt% Be, 0.001~0.3wt% Ca, 0.001~0.2wt% Zn, 0.001~0.3wt% Sr, 0.001~0.3wt% Zr, 0.002~0.25wt% Li, 0.001~0.2wt% Na, 0.002~0.25wt% K, 0.001~0.2wt% Ti, 0.001~0.15wt% V, 0.001~0.12wt% Cr, 0.001~0.12wt% Mn, 0.001~0.15wt% Ni , 0.01~3.0wt% RE, greater than zero and less than or equal to 0.2wt% Si, greater than zero and less than or equal to 0.8wt% of B and the balance of aluminum;
[0052] b) homogenizing the aluminum alloy ingot, and rolling the homogenized aluminum alloy ingot to obtain an aluminum alloy rod;
[0053] c) subjecting the aluminum alloy rod obtained in step b) to batch annealing treatment;
[0054] d) subjecting the aluminum alloy rod obtained in step c) to aging treatment to obtain an aluminum all...
Embodiment 1
[0064] (1) Put the aluminum ingot into the furnace, heat it to melt and keep it at 720℃. The melting process is completed in a sealed environment; first add Fe, Cu, Mg, Co, Be, Ca, Zn, Sr, Zr, Si Pure metals such as, B, Li, Na, K, Ti, V, Cr, Mn and Ni, stir evenly, then add rare earth RE and stir for 20 minutes until fully stirred, and let stand for 30 minutes; then refining the above alloy melt in furnace ; Add a refining agent to the alloy melt and stir it evenly, then let it stand for 30 min. The melt refining is operated in a sealed environment; after refining, slag, stand, and adjust the temperature to 650℃, the alloy liquid is poured out of the furnace, and then After degassing and slag removal treatment, enter the casting machine for casting to obtain an aluminum alloy ingot, the composition of the ingot is listed in Table 1;
[0065] (2) The aluminum alloy ingot obtained in step (1) is heated at a rate of 5°C / min, the temperature is raised to 450°C, and the temperature is...
Embodiment 2
[0070] (1) Put the aluminum ingot into the furnace, heat it to melt and keep it at 740℃. The melting process is completed in a sealed environment; first add Al-Fe, Al-Cu, Al-Mg, Al-Co, Al-Be , Al-Ca, Al-Zn, Zn-Sr, Al-Zr, Al-Si, Al-B, Al-Li, Al-Na, Al-K, Al-Ti, Al-V, Al-Cr, Al -Mn and Al-Ni master alloy, stir evenly, then add rare earth RE and stir for 20min until fully stirred and evenly, stand for 30min; then refining the above alloy melt in the furnace; add refining agent to the alloy melt and stir Evenly, let stand for 30 minutes, and the melt refining is operated in a sealed environment; after refining, slag, stand, and adjust the temperature to 720℃, the alloy liquid is poured out of the furnace, and after degassing and slag removal, it enters the casting machine for processing Casting to obtain an aluminum alloy ingot, the composition of the ingot is listed in Table 1;
[0071] (2) The aluminum alloy ingot obtained in step (1) is heated at a rate of 3°C / min, the temperatur...
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