公开(公告)号：US11090718B2

公开(公告)日：2021-08-17

申请号：US16624916

申请日：2019-09-30

申请人： University of Science and Technology Beijing

发明人： Mingli Qin ,  Gang Chen ,  Wangwang Ding ,  Xuanhui Qu

IPC分类号： B22F1/00 ,  B33Y70/00

摘要： A method based on fluidizing for modifying and preparing low-cost titanium powders for 3D printing includes: using hydrogenated-dehydrogenated irregularly-shaped titanium powders as the raw material, adding the titanium powders to a fluidized bed reactor, and introducing Ar or H2 at the flow rate of 0.5-1.5 L/min, heating the reactor to 300-700° C., and fluidizing for 5-90 min to modify the titanium powders. When filled with high-purity argon gas and heated at high temperature, the sharp edges and corners of irregularly-shaped titanium powders are ground collision of the particles due to the friction among powder particles.

公开(公告)号：US11911826B2

公开(公告)日：2024-02-27

申请号：US17200475

申请日：2021-03-12

申请人： UNIVERSITY OF SCIENCE AND TECHNOLOGY BEIJING

发明人： Gang Chen ,  Mingli Qin ,  Qiying Tao ,  Xuanhui Qu

IPC分类号： B22F9/04 ,  B33Y70/00 ,  B01J2/16 ,  B22F1/052

CPC分类号： B22F9/04 ,  B01J2/16 ,  B22F1/052 ,  B33Y70/00 ,  B22F2009/044 ,  B22F2201/02 ,  B22F2201/11 ,  B22F2202/15 ,  B22F2301/205

摘要： A method of preparation of titanium and titanium alloy powder for 3D printing is based on a fluidized bed jet milling technique. Hydride-dehydrite titanium powder and titanium alloy powder are used as main raw material powder, jet milling and shaping are carried out in shielding atmosphere of nitrogen or argon, and finally high-performance titanium and titanium alloy powder meeting the requirements of 3D printing process is obtained. The titanium and titanium alloy powder prepared using this method has a narrow particle size distribution, approximately spherical shape, and controllable oxygen content.