Degradable Mg-Zn-Sr-Ag series magnesium alloy and preparation method and application thereof
A magnesium alloy, mg-sr technology is applied in the field of biomedical metal implant materials to achieve the effect of improving plastic processing ability, good corrosion resistance, good mechanical properties and corrosion resistance.
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[0034] The present invention provides the preparation method of the degradable Mg-Zn-Sr-Ag series magnesium alloy described in the above scheme, comprising the following steps:
[0035] According to the mass ratio of the degradable Mg-Zn-Sr-Ag series magnesium alloy elements, metal magnesium, metal silver, metal zinc and Mg-Sr master alloy are sequentially smelted and poured to obtain degradable Mg-Zn-Sr -Ag-based magnesium alloy.
[0036] In the present invention, unless otherwise specified, all preparation materials are commercially available products well known to those skilled in the art.
[0037] In the present invention, the magnesium metal is preferably a magnesium ingot with a purity of 99.94wt%; the silver metal is preferably a silver wire with a purity of 99.99wt%, and the zinc metal is preferably a zinc ingot with a purity of 99.995wt%; The Mg-Sr master alloy preferably includes 20-25% of Sr and the balance of Mg in terms of mass percentage, and the mass percentage...
Embodiment 1
[0046] The composition of the degradable Mg-Zn-Sr-Ag series magnesium alloy: Zn 3.97%, Sr 0.43%, Ag 0.2% and the balance of Mg;
[0047] The raw materials used are: magnesium ingot with a purity of 99.94wt%, zinc ingot with a purity of 99.995wt%, silver wire with a purity of 99.99wt%, and a Mg-Sr master alloy with a mass percentage of Sr of 20%;
[0048] Preparation process: Add 926.16g of magnesium ingots into the resistance furnace, set the temperature at 780°C, and when the furnace temperature rises to 600°C, feed SF with a volume ratio of 2:98 6 and N 2 After the magnesium ingot is melted, add 2.04g of silver wire, stir for 2min, cool down to 720°C, add 20.4g of Mg-Sr intermediate alloy to melt, stir for 4min, add 40.8g of zinc ingot, stir for 5min after melting, and let it stand 30min, and finally poured into a ceramic mold at a temperature of 720°C.
[0049] figure 1 It is the microstructure figure of Mg-Zn-Sr-Ag series magnesium alloy described in embodiment 1, by f...
Embodiment 2
[0053] The composition of the degradable Mg-Zn-Sr-Ag series magnesium alloy: Zn 3.97%, Sr 0.43%, Ag 0.5% and the balance of Mg;
[0054] The raw materials used are: magnesium ingot with a purity of 99.94wt%, zinc ingot with a purity of 99.995wt%, silver wire with a purity of 99.99wt%, and a Mg-Sr master alloy with a mass percentage of Sr of 20%;
[0055] Preparation process: Add 923.1g of magnesium ingots into the resistance furnace, set the temperature at 780°C, and when the furnace temperature rises to 600°C, feed SF with a volume ratio of 2:98 6 and N 2 After melting the magnesium ingot, add 5.1g silver wire, stir for 2min, add 25.5gMg-Sr intermediate alloy to melt, stir for 4min, cool down to 720°C, add 40.8g zinc ingot, stir for 5min after melting, let stand for 30min, and finally Cast into ceramic molds at a temperature of 720°C.
[0056] figure 2 It is the microstructure figure of Mg-Zn-Sr-Ag series magnesium alloy described in embodiment 2, by figure 2 It can be ...
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Abstract
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