Method for improving plasticity of cast Al-Li alloy
A technology for lithium alloy and aluminum casting, applied in the field of non-ferrous metals, can solve the problems of damage to the plasticity of the alloy, weakening and refining the grains of the aluminum alloy, and insignificant improvement of the plasticity of the cast aluminum-lithium alloy. Effect
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[0036] Example 1
[0037] The chemical analysis of the alloy prepared by the aforementioned method, its composition is shown in the following table (wt%):
[0038] Li
[0039] The mechanical properties of the alloy after "pre-aging" and solution and aging treatments are:
[0040] The alloy containing 0.09Sc is: tensile strength 418MPa, the yield strength is 327MPa, and the elongation is 4.2%; the alloy containing 0.25Sc is: the tensile strength is 442MPa, the yield strength is 336MPa, and the elongation is 6.1%. The aged transmission brightfield phase of the cast aluminum-lithium alloy prepared in this example is as follows: figure 2 a shown.
Example Embodiment
[0041] Example 2
[0042] The alloy prepared by the aforementioned method is chemically analyzed, and its composition is (wt%):
[0043] Li
[0044] The mechanical properties of the alloy after "pre-aging" and solution and aging treatments are:
[0045] Containing 0.12Yb is: tensile strength 408MPa, yield strength 321MPa, elongation 3.7%;
[0046] Containing 0.23Yb is: tensile strength 423MPa, yield strength 337MPa, elongation 4.8%.
[0047] The as-cast metallographic structure of the cast aluminum-lithium alloy prepared in this example is as follows: figure 1 a shown.
Example Embodiment
[0048] Example 3
[0049] The alloy prepared by the aforementioned method is chemically analyzed, and its composition is (wt%):
[0050] Li
[0051] The mechanical properties of the alloy after "pre-aging" and solution and aging treatments are:
[0052] The tensile strength is 425MPa, the yield strength is 334MPa, and the elongation is 4.5%.
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