Method for preparing pure titanium miniature parts on basis of multi-physical-field activated sintering
A technology of activated sintering and multi-physics, which is applied to other manufacturing equipment/tools, mechanical equipment, engine components, etc., can solve the problems of long preparation cycle, complicated process, environmental pollution, etc., shorten the preparation cycle, simplify the process flow, The effect of improving product quality
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Embodiment 1
[0028] The powder mass is calculated according to the size of the titanium micro-gear (pitch circle diameter is 1.6mm, the number of teeth is 8, and the thickness is 3mm) and the theoretical density of the corresponding powder. After weighing the titanium powder, put it into the mold and fix it with a chuck. Under the vacuum condition of ≤0.01Pa, control the heating rate to 25°C / s, and simultaneously apply a force of 100MPa to both ends of the mold. When the temperature reaches 1200°C, keep it warm for 0 min, the powder is formed in the mold and compacted, and finally the power is turned off and air-cooled to take out the parts. The relative density of the prepared part is 97.90%, and the Vickers hardness is 189HV.
Embodiment 2
[0030] The powder mass is calculated according to the size of the titanium micro-gear (pitch circle diameter is 1.6mm, the number of teeth is 8, and the thickness is 3mm) and the theoretical density of the corresponding powder. After weighing the titanium powder, put it into the mold and fix it with a chuck. Under the vacuum condition of ≤0.01Pa, control the heating rate to 50°C / s, and simultaneously apply a force of 100MPa to both ends of the mold. When the temperature reaches 1200°C, keep it warm for 0 min, the powder is formed in the mold and compacted, and finally the power is turned off and air-cooled to take out the parts. The relative density of the prepared part is 98.60%, and the Vickers hardness is 196HV.
Embodiment 3
[0032] The powder mass is calculated according to the size of the titanium micro-gear (pitch circle diameter is 1.6mm, the number of teeth is 8, and the thickness is 3mm) and the theoretical density of the corresponding powder. After weighing the titanium powder, put it into the mold and fix it with a chuck. Under the vacuum condition of ≤0.01Pa, control the heating rate to 75°C / s, and simultaneously apply a force of 100MPa to both ends of the mold. When the temperature reaches 1200°C, keep it warm for 0 min, the powder is formed in the mold and compacted, and finally the power is turned off and air-cooled to take out the parts. The relative density of the prepared part is 98.80%, and the Vickers hardness is 198HV.
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