(1) The dual liquid lost foam casting process is proposed to produce bimetallic liner. Placing the wear-resistant cast iron at the bottom of the mold and adopting the pouring process of pouring molten iron first and then winding molten steel is conducive to ensuring the casting quality of the wear-resistant surface.
(2) The mechanical model of mold collapse in bimetal composite casting process was established. The key condition to avoid box collapse at the top and side of the mold during pouring or after pouring is that the whole mold provides enough P resistance (resistance per unit area when the coating layer and molding sand move). In order to ensure that no box collapse occurs in the process of bimetal liquid lost foam composite casting, in addition to increasing the vacuum pumping process measures, the thick wall (2-3mm) high-strength coating layer is mainly used.
(3) Based on the information acquisition technology, the temperature field in the process of composite casting was designed and tested. The optimal combination temperature of wear-resistant cast iron and carbon steel was determined as: 1210 ° C on the surface of high chromium cast iron and 1550 ° C on carbon steel.