Method for preparing porous titanium coating on surface of titanium alloy
A technology of porous titanium and titanium alloy, which is applied in the coating process and coating of metal materials, can solve the problems of high bonding force, singleness, and not suitable for porous titanium coating on the surface of implants, and achieve enhanced interface bonding strength and temperature The effect of low and small molecular weight
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Embodiment 1
[0025] The matrix powder is pure titanium powder, the oxygen content is 0.18wt%, and the average particle size is 60 μm; according to the properties of the matrix powder, TiH with an average particle size of 40 μm is selected. 2 Powder with an oxygen content of 0.3 wt%. Add forming aids, its composition is: naphthalene 90%, stearic acid 1%, polyethylene wax 9%. Add the forming aid to the powder, knead at 80°C for 30 minutes, the volume content of the powder is 40%, and a coating material with good fluidity and viscosity is obtained. Fix the matrix in the middle of the mold, fill the coating material into the mold, raise the temperature to 80°C, and warm press to form, the pressing pressure is 3MPa. After demolding, a shaped blank with the desired shape is obtained. Place the formed billet in a vacuum furnace, under 5Pa vacuum, raise the temperature to 90°C at a rate of 1°C / min, keep it warm for 6 hours, then raise the temperature to 200°C at 2°C / min and keep it warm for 1 ho...
Embodiment 2
[0027] The matrix powder is pure titanium powder, the oxygen content is 0.18wt%, and the average particle size is 60 μm; according to the properties of the matrix powder, TiH with an average particle size of 50 μm is selected. 2 Powder with an oxygen content of 0.32 wt%. Add forming aids, its composition is: naphthalene 90%, stearic acid 1%, polyethylene wax 9%. Add the forming aid to the powder, knead at 80°C for 1 hour, the volume content of the powder is 50%, and a coating material with good fluidity and viscosity is obtained. Fix the matrix in the middle of the mold, fill the coating material into the mold, raise the temperature to 90°C, and warm press to form with a pressing pressure of 10MPa. After demolding, a shaped blank with the desired shape is obtained. Place the molded billet in a vacuum furnace, raise the temperature to 85°C at a rate of 2°C / min under a vacuum of 0.1Pa, keep it warm for 11 hours, then raise the temperature to 200°C at 1°C and keep it warm for 0...
Embodiment 3
[0029] The matrix powder is hydrogenated dehydrogenation titanium powder, the oxygen content is 0.35wt%, and the average particle size is 45 μm. According to the properties of the matrix powder, TiH with an average particle size of 45 μm is selected. 2 Powder with an oxygen content of 0.3 wt%. Add forming aids, its composition is: naphthalene 95%, stearic acid 3%, polyethylene wax 2%. Add the forming aid to the powder, knead at 90°C for 90 minutes, the volume content of the powder is 60%, and a coating material with good fluidity and viscosity is obtained. The matrix is fixed in the middle of the mold, and injection molded at 85°C, the injection pressure is 20MPa, the injection speed is 20g / s, and the mold temperature is 30°C to obtain a rough product. After demolding, a shaped blank with the desired shape is obtained. Place the formed billet in a vacuum furnace, under 10Pa vacuum, raise the temperature to 80°C at a rate of 3°C / min, keep it warm for 12 hours, then raise th...
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