Low-cost high-strength wrought magnesium alloy and preparation method thereof
A deformed magnesium alloy, high-strength technology, applied in the field of metal materials, can solve the problems of expensive rare earth elements, etc., achieve significant grain refinement effect, low alloy cost, and reduce material cost
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[0033] The present invention also provides a method for preparing a low-cost high-strength deformed magnesium alloy. The magnesium alloy is prepared by melting and casting pure magnesium, pure samarium and pure calcium as raw materials, solid solution treatment, high-pressure torsion and aging treatment, including the following steps :
[0034] 1. Preparation of magnesium alloy ingots: melting the raw materials of pure magnesium, pure samarium and pure calcium, and casting them into magnesium alloy ingots;
[0035] 2. Preparation of high-pressure torsion material: The above-mentioned magnesium alloy ingot is isolated from the air by covering it with magnesium oxide powder in a crucible and compacting the magnesium alloy. It is solution-treated at 510-530°C for 8-12 hours, quenched in water, and processed into a high-pressure torsion material;
[0036] 3. Preparation of high-pressure torsion samples: High-pressure torsion treatment is carried out at room temperature, the torsi...
Embodiment 1
[0040] 1. Preparation of magnesium alloy ingot: Sm: 6.8wt.%; Ca: 1.2wt.%; the balance is Mg and unavoidable impurity elements, and the total content of impurity elements is below 0.03wt.%. , and cast into magnesium alloy ingots;
[0041] 2. Preparation of high-pressure torsion material: The above-mentioned magnesium alloy ingot was solution treated at 530° C. for 8 hours. During the treatment, it was covered with magnesium oxide powder in a crucible and compacted. Water quenching, and processed into high-pressure torsion material;
[0042] 3. Preparation of high-pressure torsion samples: High-pressure torsion treatment is carried out at room temperature, the torsion pressure is 5GPa, the number of torsion turns is 4r, and the torsion speed is 1r / min, and the high-pressure torsion samples are prepared by plastic deformation;
[0043] 4. Aging treatment: heat-treat the above-mentioned high-pressure twisted sample at 150° C. for 8 hours, cover and compact it with magnesium oxide...
Embodiment 2
[0046] The low-cost high-strength wrought magnesium alloy in this embodiment has a mass percentage of Sm: 5.0wt.%; Ca: 0.8wt.%; and the balance is Mg and unavoidable impurity elements.
[0047] The preparation of the low-cost high-strength wrought magnesium alloy in this embodiment includes the following steps:
[0048] 1. Preparation of magnesium alloy ingot: Sm: 5.0wt.%; Ca: 0.8wt.%; the balance is Mg and unavoidable impurity elements, and the total content of impurity elements is below 0.03wt.%. , and cast into magnesium alloy ingots;
[0049] 2. Preparation of high-pressure torsion material: The above-mentioned magnesium alloy ingot was solution treated at 530° C. for 8 hours. During the treatment, it was covered with magnesium oxide powder in a crucible and compacted. Water quenching, and processed into high-pressure torsion material;
[0050] 3. Preparation of high-pressure torsion samples: High-pressure torsion treatment is carried out at room temperature, the torsion p...
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