A kind of preparation method of biomedical porous titanium alloy
A biomedical and titanium alloy technology, applied in the field of medical metal materials and porous materials, can solve the problems of low strength and high porosity of porous titanium materials, achieve high strength, good toughness, and overcome poor mechanical properties
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Embodiment approach 1
[0018] Embodiment 1: The preparation method of the biomedical porous titanium alloy of this embodiment is:
[0019] (1) Mix titanium hydride powder with a purity of 99.7%, a particle size of 325 mesh, pure titanium wire, and ammonium bicarbonate with a purity of 95% according to a mass ratio of 90:5:5, then conduct ballless milling, and finally press Under the condition of 187MPa, it is pressed into a φ20x3mm billet; the diameter of the pure titanium wire is 0.03mm, and the length is 1mm. The ball mill adopts a swingable planetary ball mill. The rotation frequency of the ball mill is 10 Hz. The rotor stops rotating every 20 minutes of stirring, and the powder mixing is stopped. The residence time is 10 minutes, and the total mixing time is 4 hours.
[0020] (2) Put the billet in a vacuum of less than 10 -2 Degrease under the condition of Pa, keep the heating rate at 5°C / min, keep warm for 60min after the temperature rises to 120°C;
[0021] (3) Continue to pump the vacuum un...
Embodiment approach 2
[0022] Embodiment 2: The preparation method of the biomedical porous titanium alloy of this embodiment is:
[0023] (1) Mix titanium hydride powder with a purity of 99.5%, a particle size of 45 mesh, Ti-6Al-4V titanium alloy wire, and ammonium bicarbonate with a purity of 96% according to a mass ratio of 85:5:10, and then carry out no Ball milling, and finally pressed into a billet under the condition of a pressure of 90MPa; titanium alloy wire with a diameter of 1mm and a length of 0.1mm. The ball mill adopts a swingable planetary ball mill. The rotation frequency of the ball mill is 20 Hz. The rotor stops rotating every 10 minutes of stirring, and the powder mixing is stopped. The residence time is 5 minutes, and the total mixing time is 7 hours.
[0024] (2) Put the billet in a vacuum of less than 10 -1 Degrease under the condition of Pa, keep the heating rate at 10°C / min, keep warm for 20min after the temperature rises to 80°C;
[0025] (3) Continue to pump the vacuum un...
Embodiment approach 3
[0026] Embodiment 3: The preparation method of the biomedical porous titanium alloy of this embodiment is:
[0027] (1) Mix titanium hydride powder with a purity of 99.7% and a particle size of 20 meshes, Ti-Ni titanium alloy wire and 95% ammonium bicarbonate according to a mass ratio of 50:5:45, then conduct ballless ball milling, and finally Under the condition of a pressure of 400 MPa, it is pressed into a billet; the titanium alloy wire has a diameter of 0.1 mm and a length of 3 mm. The ball mill adopts a swingable planetary ball mill. The rotation frequency of the ball mill is 5 Hz. The rotor stops rotating every 30 minutes of stirring, and the powder mixing is stopped. The residence time is 25 minutes, and the total mixing time is 3 hours.
[0028] (2) Put the billet in a vacuum of less than 10 -1 Degrease under the condition of Pa, keep the heating rate at 15°C / min, keep warm for 40min after the temperature rises to 300°C;
[0029] (3) Continue to pump the vacuum unde...
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