Preparation of Titanium and Titanium Alloy Powder for 3D Printing Based on Fluidized Bed Jet Milling Technique

A method of preparation of titanium and titanium alloy powder for 3D printing based on fluidized bed jet milling technique, wherein comprising the following steps:

• step 1):
• weighing a certain amount of hydride-dehydrate titanium powder or titanium alloy powder, which has 1,000-2,000 PPM oxygen content and is in particle size of 200-800 meshes and irregular morphology;
• step 2):
• loading the titanium and titanium alloy powder in a fluidized bed jet grinding chamber, wherein three nozzles in communication with an air source are arranged above the fluidized bed jet grinding chamber at 60-90° included angle between the nozzles and the wall surface of the grinding chamber, and a powder inlet and a powder outlet are arranged at the two ends of the fluidized bed jet grinding chamber;
• step 3):
• placing the powder in the grinding chamber of a fluidized bed jet mill, charging high-purity nitrogen or high-purity argon as a grinding gas into the grinding chamber through a gas inlet, adjusting grinding gas pressure in the fluidized bed jet mill to 0.1-10 MPa, and jetting titanium and titanium alloy powder from the powder outlet;
• adjusting the frequency of the classifier wheel to 0-60 Hz/min and adjusting the grinding time to 2-60 min.