Production of Bronze-Steel Bimetallic Parts by Lost Foam Casting

The process of interaction of a bronze insert placed in a lost foam mold with liquid steel filling this mold and thus producing a bimetallic part is investigated. It has been established that for a strong connection of metals, melting of the bronze insert and joint sequential cooling and solidification of the metals are required. Numerical method for determining the filling temperature and the mass of liquid steel for a certain bronze insert has been developed; various filling options have been considered. Experimental research on the production of bimetallic parts (blanks for slide nuts) by lost foam casting has been carried out. The possibility of producing bimetallic bronze-steel parts of sufficient strength (when the design conditions of filling are met) has been confirmed. The connection surface of the alloys is even, no cracks were found.