公开(公告)号：EP4286073A1

公开(公告)日：2023-12-06

申请号：EP23175896.2

申请日：2023-05-29

申请人： Citic Dicastal Co., Ltd. ,  Citic Co., Limited

发明人： LIANG, Xin ,  BAI, Bangwei ,  LIU, Haifeng ,  ZHANG, Hongren ,  XIE, Liming ,  MA, Chao ,  MA, Baoshui ,  WANG, Ji ,  ZHANG, Bao ,  Peng, QIN

IPC分类号： B22D17/20 ,  B22D18/00

摘要： A riser tube coating for a cast aluminum alloy includes a coating-riser tube contact layer material and a coating-aluminum liquid contact layer material. The present invention has a coating protection effect to the maximum mainly by designing ratios of ZrO, Al 2 O 3 , ZnO, binders and other materials and a coat drying heat treatment process, and finally realizes effects of protecting a riser tube, being free of aluminum sticking and prolonging a service life.