High-strength low-density hcp+bcc dual-structure magnesium-lithium alloy bar and preparation method thereof
A magnesium-lithium alloy and low-density technology, which is applied in the field of high-strength and low-density hcp+bcc double-structure magnesium-lithium alloy rods and its preparation, can solve the problems of limiting the application value of magnesium-lithium alloys and low alloy strength, and achieve improved purity The effect of improving alloy yield, improving alloy strength, and improving heat resistance
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[0030] Example 1
[0031] A high-strength and low-density hcp+bcc dual-structure magnesium-lithium alloy bar. Its raw materials are as follows by weight percentage: the chemical composition and weight percentage of magnesium-lithium alloy are: Li: 8.8%, Al: 5.7%, Zn: 1.9%, 0.5 %Y, unavoidable impurity elements such as Ca, Fe, Cu, Ni, etc., the total amount is less than 0.2%, where Fe≤0.04%, Ca≤0.03%. The remainder is Mg.
[0032] Dry each raw material at 200±5℃ for 30min, then put the pure magnesium ingot in a smelting furnace and raise the temperature to 720±5℃. After all the metal magnesium is melted, a magnesium melt is formed, and then the dried Mg-Y is in the middle The alloy, pure aluminum and pure zinc are placed in the magnesium melt in sequence, and the covering agent is sprayed to cover the surface of the magnesium melt, and the temperature is controlled at 720℃ and stirred;
[0033] Under the condition of passing protective gas, the melt is cooled to 670℃, the pure lithi...
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