High strength high plasticity magnesium alloy
A high plasticity, magnesium alloy technology, applied in the field of metal materials, can solve the problems of low price and low strength of M2 alloy, and achieve the effects of improving room temperature and high temperature strength, good solid solution strengthening, and refining grains
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Embodiment 1
[0011] The composition (percentage by weight) of the alloy of the present invention is: 2% Mn, 2% Gd, 0.6% Zr, and the balance is Mg and unavoidable impurities. Prepare the alloy according to the above-mentioned composition, and the introduction of Mn, Gd, Zr elements is all realized by adding Mg-Mn, Mg-Gd, Mg-Zr master alloy, and the weight percentages of Mn, Gd, Zr in the master alloy are respectively 4.10%, 24.50%, 27.85%. The alloy is prepared by semi-continuous stirring and melting casting method. The crucible is cleaned with solvent, and No. 2 solvent is sprinkled on the bottom of the furnace. 2.242kg of Zr master alloy is preheated and added to the crucible, heated, sprinkled with covering agent, and passed into SF 6 and CO 2 Mixed gas protection, stir after melting, let stand for 20min and cast. The alloy was preheated to 480°C, and after extrusion at 450°C, the tensile strength was 205.07MPa, the yield strength was 149.98MPa, and the elongation was 36.75%.
Embodiment 2
[0013] The alloy composition (percentage by weight) is: 2% Mn, 4% Gd, 0.6% Zr, and the balance is Mg and unavoidable impurities. 6.720kg of pure magnesium ingot, 13.586kg of Mg-Mn master alloy, 4.545kg of Mg-Gd master alloy and 3.000kg of Mg-Zr master alloy are used. Its manufacturing process is identical with embodiment 1. Its tensile strength is 205.73MPa, yield strength is 141.99MPa, and elongation is 34.85%.
Embodiment 3
[0015] The alloy composition (percentage by weight) is: 2% Mn, 6% Gd, 0.6% Zr, and the balance is Mg and unavoidable impurities. 6.720kg of pure magnesium ingot, 20.529kg of Mg-Mn master alloy, 10.302kg of Mg-Gd master alloy and 4.533kg of Mg-Zr master alloy are used. Its manufacturing process is identical with embodiment 1. Its tensile strength is 236.63MPa, yield strength is 168.04MPa, and elongation is 32.35%.
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