公开(公告)号：US11660663B2

公开(公告)日：2023-05-30

申请号：US16989541

申请日：2020-08-10

申请人： Wuhan University of Science and Technology

发明人： Guangqiang Li ,  Qiang Wang ,  Yu Liu ,  Ao Huang ,  Wen Yan ,  Wan Zheng ,  Huazhi Gu

IPC分类号： B22C9/08 ,  C04B35/04 ,  C04B38/00 ,  C04B41/00 ,  C04B41/50 ,  C04B41/87

CPC分类号： B22C9/086 ,  C04B35/04 ,  C04B38/0051 ,  C04B41/009 ,  C04B41/5032 ,  C04B41/5041 ,  C04B41/87 ,  C04B2235/3206 ,  C04B2235/3244 ,  C04B2235/3418 ,  C04B2235/9676

摘要： A spiral-orifice ceramic filter for metal casting, including spiral channels and two drain openings, where the spiral channels are distributed in a ceramic substrate in a staggered manner. By adoption of the spiral channel structure, molten metal may rotate to generate a centrifugal force while flowing forwards so as to promote separation of inclusions. The spiral-orifice ceramic filter for metal casting includes the following components: 90-95 wt % of MgO, 4-8 wt % of SiO2 and 2-4 wt % of ZrO2. Therefore, the spiral-orifice ceramic filter for metal casting has high strength under normal temperature and optional thermal impact resistance under high temperature, and may tolerate the impact of molten metal at 1700° C. or higher without break. The ceramic substrate and the spiral channel are superficially coated with one layer of functional oxide prepared from CaO.2Al2O3, CaO.6Al2O3, Al2O3, TiO2, or Re2O3.