High-strength and heat-resistance Mg-Zn-Al-Y-Sb magnesium alloy and preparation method thereof
A magnesium alloy, heat-resistant technology, applied in the field of magnesium alloy materials, can solve the problems of increasing the cost of rare earth alloys, inconspicuous improvement in heat resistance, reduction, etc., and achieve the improvement of room temperature and high temperature mechanical properties. The effect of simple operation of processing technology
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Embodiment 1
[0030] A high-strength heat-resistant Mg-Zn-Al-Y-Sb magnesium alloy, the components of which include: 2-4wt.% Zn, 2-4wt.% Al, 0.5-2wt.% Y, 0.2-1wt.% Sb, The total amount of impurity elements Si, Fe, Cu and Ni is less than 0.02wt.%, and the balance is Mg.
[0031] The wt.% refers to the percentage of the components in the total mass of the configured alloy, and the total mass is the sum of the mass of Mg, Zn, Al, Sb and Mg-Y master alloy.
[0032] Its preparation method is divided into two stages of smelting and heat treatment process:
[0033] Among them, the melting process is in SF 6 and CO 2 Under the condition of mixed gas protection, the steps are as follows:
[0034] (1) Baking material: Weigh pure Mg, pure Zn, pure Al, pure Sb, and Mg-Y master alloy respectively, and then preheat all the above-mentioned raw materials for more than 3 hours to reach 180-250°C for drying;
[0035] (2) Melting Mg: putting the dried Mg into a crucible resistance furnace to melt to form m...
Embodiment 2
[0044] A high-strength heat-resistant Mg-Zn-Al-Y-Sb magnesium alloy, the mass percentage of its components is: 2wt.% Zn, 2wt.% Al, 0.5wt.% Y, 0.2wt.% Sb, impurity element Si The total amount of , Fe, Cu and Ni is 0.01wt.%, and Mg is 95.29wt.%.
[0045] The preparation method of the high-strength heat-resistant Mg-Zn-Al-Y-Sb magnesium alloy is as follows:
[0046] First, the smelting process is carried out, and the entire smelting process is carried out in SF 6 and CO 2 Under the condition of mixed gas protection, specifically:
[0047] (1) Weigh pure Mg, pure Zn, pure Al, Mg-Y master alloy and pure Sb respectively. Then, preheat all the above-mentioned raw materials for more than 3 hours to reach 180°C for drying.
[0048] (2) Put the dried pure Mg into the SF 6 / CO 2 Melt in a gas shielded crucible resistance furnace. When the temperature of the molten magnesium reaches 700°C, 2wt.% pure Zn is added.
[0049] (3) When the melt temperature rises to 700° C. after pure Z...
Embodiment 3
[0057] The components and mass percentages of the high-strength heat-resistant Mg-Zn-Al-Y-Sb magnesium alloy are: 3wt.% Zn, 3wt.% Al, 1wt.% Y, 0.5wt.% Sb, impurity elements Si, Fe, The total amount of Cu and Ni is 0.015 wt.%, and Mg is 92.485 wt.%.
[0058] The preparation method of the high-strength heat-resistant Mg-Zn-Al-Y-Sb magnesium alloy is as follows:
[0059] First, the smelting process is carried out, and the entire smelting process is carried out in SF 6 and CO 2 Under the condition of mixed gas protection, specifically:
[0060] (1) Weigh pure Mg, pure Zn, pure Al, Mg-Y master alloy and pure Sb respectively. Then, preheat all the above-mentioned raw materials for more than 3 hours to reach 200° C. for drying.
[0061] (2) Put the dried pure Mg into the SF 6 / CO 2 Melt in a gas shielded crucible resistance furnace. After the magnesium liquid temperature reaches 720 ℃, add 3wt.% pure Zn.
[0062] (3) When the melt temperature rises to 720°C after pure Zn is m...
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