Biodegradable ultra-fine grain Zn-Li alloy material as well as preparation method and application thereof
An alloy material and ultra-fine grain technology, applied in the field of biodegradable metal materials, can solve the problems of poor comprehensive mechanical properties of pure zinc, unsatisfactory strength and ductility, etc., to improve comprehensive mechanical properties, controllable degradation rate, avoid The effect of secondary surgery
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[0028] Example 1
[0029] Preparation and performance testing of Zn-0.5Li alloy. The mass fraction of Li in the Zn-0.5Li alloy is 0.5%, and the balance is Zn. The alloy preparation process is smelting→casting→hot extrusion→multi-pass drawing at room temperature. Specifically, the corresponding proportions of pure zinc and Zn-Li intermediate alloy are weighed into a crucible, and smelted in an induction melting furnace. Heat the Zn-Li master alloy and 90% pure zinc to 600°C, keep the temperature for about 5 minutes, and stir evenly. After complete melting, add the remaining 10% pure zinc, and stir to remove the slag after complete melting. The as-cast zinc alloy was poured into a cylindrical casting mold preheated to 500°C, and air-cooled to room temperature (25°C). The cylindrical cast zinc alloy taken out from the die and the extrusion die were placed in a box furnace, heated to 260° C., kept for 2 hours, and extruded into a bar with a hydraulic press at an extrusion ratio...
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[0030] Example 2
[0031] Preparation and performance testing of Zn-0.05Li alloy. The mass fraction of Li in the Zn-0.05Li alloy is 0.05%, and the balance is Zn. The alloy preparation process is smelting→casting→hot extrusion→multi-pass rotary forging at room temperature. Specifically, the corresponding proportions of pure zinc and Zn-Li intermediate alloy are weighed into a crucible, and smelted in an induction melting furnace. Heat the Zn-Li master alloy and 90% pure zinc to 550°C, keep the temperature for about 5 minutes, stir evenly, add the remaining 10% pure zinc after complete melting, and stir to remove the slag after complete melting. The as-cast zinc alloy was poured into a cylindrical casting mold preheated at 520°C, and air-cooled to room temperature (25°C). The cylindrical cast zinc alloy taken out from the die and the extrusion die were put into a box furnace, heated to 250° C., kept for 2 hours, and extruded to a bar with a hydraulic press at an extrusion rat...
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[0032] Example 3
[0033]Preparation and performance testing of Zn-1Li alloy. The mass fraction of Li in the Zn-1Li alloy is 1%, and the balance is Zn. The alloy preparation process is smelting→casting→hot extrusion→multi-pass rotary forging at room temperature. Specifically, the corresponding proportions of pure zinc and Zn-Li intermediate alloy are weighed into a crucible, and smelted in an induction melting furnace. Heat the Zn-Li master alloy and 90% pure zinc to 580°C, keep the temperature for about 5 minutes, and stir evenly. After complete melting, add the remaining 10% pure zinc, and stir to remove the slag after complete melting. The as-cast zinc alloy was poured into a cylindrical casting mold preheated at 550°C, and air-cooled to room temperature (25°C). The cylindrical cast zinc alloy taken out from the die and the extrusion die were put into a box furnace, heated to 300° C., kept for 2 hours, and extruded into a bar with a hydraulic press with an extrusion rati...
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