Preparation method of heart and brain intravascular stent
A cardiovascular and cerebrovascular, high-temperature melting technology, applied in the field of medical applications, can solve problems such as impaired vascular function and poor corrosion resistance, and achieve the effects of eliminating vascular sclerosis, excellent corrosion resistance, and low elastic modulus
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[0031] Example 1
[0032] A method for preparing a cardio-cerebrovascular stent includes the following steps:
[0033] (1) Equipped with raw materials, the weight percentage of alloy components in the cardio-cerebral stent is 1.5% zirconium, 2% molybdenum, 3.5% niobium, and the rest are magnesium and titanium, wherein the weight ratio of magnesium to titanium is 2:1;
[0034] (2) Adjust the temperature in the high-temperature smelting furnace to 1900℃. When the temperature rises to 800℃, add the alloy components in the above-mentioned weight ratio except magnesium to the high-temperature smelting furnace, and smelt at 1900℃ for 1.5h, and the surface Removal of scum; keep the heating rate at 80℃ / min, then increase the temperature in the high-temperature melting furnace to 2200℃, and then smelt at this temperature for 3h; lower the temperature of the high-temperature melting furnace to 720℃, and then add the above The weight ratio of magnesium is smelted at this temperature for 2.5 ho...
Example Embodiment
[0048] Example 2
[0049] A method for preparing a cardio-cerebrovascular stent includes the following steps:
[0050] (1) Equipped with raw materials, the weight percentage of alloy components in the cardio-cerebrovascular stent is 2.5% zirconium, 1% molybdenum, 4.5% niobium, and the rest are magnesium and titanium, wherein the weight ratio of magnesium to titanium is 2:1;
[0051] (2) Adjust the temperature in the high-temperature smelting furnace to 1700℃. When the temperature rises to 800℃, add the alloy components in the above-mentioned weight ratio except magnesium to the high-temperature smelting furnace, and smelt at 1700℃ for 2.5h, and the surface Remove the scum; keep the heating rate at 60℃ / min, then increase the temperature in the high-temperature melting furnace to 2500℃, and then smelt at this temperature for 2h; lower the temperature of the high-temperature melting furnace to 750℃, and then add the above The weight ratio of magnesium is smelted at this temperature for...
Example Embodiment
[0065] Example 3
[0066] A method for preparing a cardio-cerebrovascular stent includes the following steps:
[0067] (1) Equipped with raw materials. The weight percentage of alloy components in the cardio-cerebral stent is 2% zirconium, 1.5% molybdenum, 4% niobium, and the rest are magnesium and titanium, and the weight ratio of magnesium to titanium is 2:1;
[0068] (2) Adjust the temperature in the high-temperature smelting furnace to 1800°C. When the temperature rises to 800°C, add the alloy components in the above-mentioned weight ratio except magnesium to the high-temperature smelting furnace, smelt at 1800°C for 2 hours, and remove the Scum removal; keep the heating rate at 70℃ / min, then increase the temperature in the high-temperature melting furnace to 2350℃, and then smelt at this temperature for 2.5h; lower the temperature of the high-temperature melting furnace to 740℃, and then add the above The weight ratio of magnesium is smelted at this temperature for 2 hours; Ar ...
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