Al-Fe-Ba-RE aluminum alloy, and preparation method and power cable thereof
An al-fe-ba-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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[0066] The present invention also provides a method for preparing an Al-Fe-Ba-RE aluminum alloy, comprising the following steps:
[0067]a) Cast the raw materials of the following composition 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 , 0.001~0.2wt% of Ga, 0.003~0.2wt% of Ge, 0.001~0.2wt% of Rb, 0.001~0.15wt% of Nb, 0.001~0.2wt% of Mo, 0.001~0.25wt% of Tc, 0.001 ~0.15wt% Ru, 0.002~0.1wt% Rh, 0.001~0.12wt% Pd, 0.001~0.1wt% Ag, 0.002~0.13wt% Cd, 0.003~0.18wt% In, 0.001~0.08 wt% Sn, 0.001~0.3wt% Sb, 0.001~0.2wt% Cs, 0.001~0.08wt% Ba, 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;
[0068] b...
Embodiment 1
[0080] (1) Put the aluminum ingot into the furnace, heat it to melt and keep it warm at 720°C. The melting process is completed in a sealed environment; first add Fe, Cu, Mg, Co, Be, Ca, Zn, Sr, Zr, Si , B, Li, Na, K, Ti, V, Cr, Mn, Ni, Ga, Ge, Rb, Nb, Mo, Tc, Ru, Rh, Pd, Ag, Cd, In, Sn, Sb, Cs and Ba , stir evenly, then add rare earth RE and stir for 20 minutes until it is fully stirred evenly, and then keep it for 30 minutes; Melt refining is operated in a sealed environment; after refining, the slag is removed, the temperature is adjusted to 650°C, the alloy liquid is poured out of the furnace, and after degassing and slag removal, it enters the casting machine for casting to obtain aluminum alloy ingots. The ingot composition is listed in Table 1;
[0081] (2) Heat up the aluminum alloy ingot obtained in step (1) at a rate of 5°C / min to 450°C, hold it for 6 hours, and then roll it into a rod;
[0082](3) Anneal the rod material obtained in step (2) under an inert atmosph...
Embodiment 2
[0086] (1) Put the aluminum ingot into the furnace, heat it to melt and keep it warm at 740°C. 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, Al-Ni, Al-Ga, Al-Ge, Al-Rb, Al-Nb, Al-Mo, Al-Tc, Al-Ru, Al-Rh, Al-Pd, Al-Ag, Al-Cd , Al-In, Al-Sn, Al-Sb, Al-Cs and Al-Ba master alloys, stir evenly, then add rare earth RE and stir for 20 minutes until fully stirred evenly, and keep it for 30 minutes; then furnace the above alloy melt Internal refining; add refining agent to the alloy melt, stir evenly, and then let it stand for 30 minutes. The melt refining is operated in a sealed environment; After degassing and slag removal, enter the casting machine for casting to obtain aluminum alloy ingots. The ingot composition is listed in Table 1;
[0087] (2) Heat up the aluminum alloy ingot obtained in step (1) at a rate of 3°C / min to 550°C, hold...
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