Abrasion-resisting and corrosion-resisting composite impeller

The invention relates to an abrasion-resisting and corrosion-resisting composite impeller, and belongs to the field of fluid machinery. The composite impeller comprises a metal wheel hub and a ceramicblade; the center of the metal wheel hub is provided with a connecting ring, and the outer wall of the connecting ring is provided with connecting rods in a radially outward extending mode; the ceramic blade is of an impeller blade structure machined through ceramic materials, and a hub positioning groove which is matched with the front end of the metal hub in appearance is reserved in the centerof the rear end of the ceramic blade; and the metal hub is inserted into the hub positioning groove in the rear end of the ceramic blade, and the metal hub and the hub positioning groove of the ceramic blade are glued and fixed through resin glue. According to the abrasion-resisting and corrosion-resisting composite impeller, the structure is simple, mounting is convenient, the problem of fast corrosion of the impeller un