High-strength heat-resistant cast aluminum-copper alloy with low porosity and preparation process
A preparation process and a technology for casting aluminum, applied in the field of high-strength and heat-resistant casting aluminum-copper alloy and preparation process, can solve the problems of inapplicability and large loss of aluminum liquid, and achieve the effects of low porosity, low equipment requirements, and simple operation.
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[0045] Example 1
[0046] The alloy composition is: 0.14%V, 0.08%Zr, Zr / V=0.571, RE0.036 (rare earth Ce), 0.38%Ti, 0.08%B, 6.52%Cu, 0.23%Ag, 0.08%Mg, 0.34%Mn, The balance is Al, and the sum of the components is 100%.
[0047] The melting and casting process of the alloy follows the following steps: (1) According to the above formula, configure 300kg of the cast aluminum alloy material, in which Al, Ag, Mg are pure metals, and the remaining elements are intermediate alloys of aluminum. Clean the surface of the above metal. No dust and oil, pure Mg is wrapped tightly in aluminum foil, and then baked at 150~300℃ for 1~2h; (2) The surface of the tools used in alloy melting and casting needs to be cleaned and pre-painted with zinc oxide paint, and the temperature is 150~300℃. Drying and preheating at 300℃ for 3~5h, meanwhile, drying and preheating the sand mold in a drying furnace at 200~400℃ for 2~4h; (3) First melt pure Al in a melting furnace at 770℃, Then add pure Ag and Al-Cu, Al...
Example Embodiment
[0049] Example 2
[0050] The alloy composition is: 0.23% V, 0.05% Zr, Zr / V = 0.217, RE0.014 (rare earth Y), 0.29% Ti, 0.06% B, 4.84% Cu, 0.52% Ag, 0.32% Mg, 0.27% Mn, The balance is Al, and the sum of the components is 100%.
[0051] The melting and casting process of the alloy is the same as in Example 1.
[0052] Firstly, the casting body is subjected to 515℃ / 12h solution heat treatment, and then 175℃ / 4h artificial aging heat treatment. Its room temperature and high temperature tensile properties are shown in Table 1.
Example Embodiment
[0053] Example 3
[0054] The alloy composition is: 0.28% V, 0.04% Zr, Zr / V = 0.143, RE0.01 (rare earth Yb), 0.20% Ti, 0.04% B, 7.70% Cu, 0.85% Ag, 0.38% Mg, 0.31% Mn, The balance is Al, and the sum of the components is 100%.
[0055] The melting and casting process of the alloy is the same as in Example 1.
[0056] First, the casting body is subjected to 530℃ / 2h solution heat treatment, and then 185℃ / 2h artificial aging heat treatment. Its room temperature and high temperature tensile properties are shown in Table 1.
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