Al-fe-ti-re aluminum alloy and its preparation method and power cable
An al-fe-ti-re, power cable technology, applied in the field of alloys, can solve problems such as poor comprehensive performance, poor fatigue resistance, and quality problems of aluminum alloy power cables
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[0046] The present invention also provides a method for preparing an Al-Fe-Ti-RE aluminum alloy, comprising the following steps:
[0047] 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, 0.01~3.0wt% RE, greater than zero and less than or equal to 0.2wt% Si, greater than zero and less than or equal to 0.8wt% B and remainder amount of aluminum;
[0048] b) performing homogenization treatment on the aluminum alloy ingot, and rolling the homogenized aluminum alloy ingot to obtain an aluminum alloy rod;
[0049] c) subjecting the aluminum alloy rod obtained in step b) to batch annealing treatment;
[0050] d) performing aging treatment on the aluminum alloy rod obtained in step c) to obtain an aluminum alloy.
[0051] A...
Embodiment 1
[0060] (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 Al-Fe, Al-Cu, Al-Mg, Al-Co, Al-Be , Al-Ca, Al-Zn, Al-Sr, Al-Zr, Al-Si, Al-B, Al-Li, Al-Na, Al-K and Al-Ti master alloys, stir well and then add rare earth RE Stir for 20 minutes until it is fully stirred evenly, then keep it warm for 30 minutes; then refine the above alloy melt in the furnace; add refining agent to the alloy melt, stir evenly, then keep it for 30 minutes, and melt refining is operated in a sealed environment After refining, slag removal, standing still, and temperature adjustment to 650 ° C, the alloy liquid was poured out of the furnace, and after degassing and slag removal, it was cast in a casting machine to obtain an aluminum alloy ingot. The composition of the ingot is listed in Table 1;
[0061] (2) Heat up the aluminum alloy ingot obtained in step (1) at a rate of 5°C / min to 450°C, hold it for...
Embodiment 2
[0066] (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 and Al-Ti master alloys, stir well and then add rare earth RE Stir for 20 minutes until it is fully stirred evenly, then keep it warm for 30 minutes; then refine the above alloy melt in the furnace; add refining agent to the alloy melt, stir evenly, then keep it for 30 minutes, and melt refining is operated in a sealed environment After refining, slag removal, standing still, and temperature adjustment to 720 ° 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 composition of the ingots is listed in Table 1;
[0067] (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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