Theoretical research of co‐extrusion process of aluminum AA3003/AA7072 clad alloys

Abstract

AbstractThe vaporizer tube base material and the clad material were simultaneously extruded to produce a tube having a smooth surface and a clad layer having excellent coupling characteristics. The process of controlling the thickness of the clad layer by simultaneously extruding two metals with different mechanical properties requires a high degree of precision compared to a single metal extrusion process and requires careful consideration for setting appropriate manufacturing parameters. In setting these variables, the trial and error approach by repeated extrusion results in excessive research cost and time consuming. Therefore, in this study, computer simulation was carried out to investigate the relationship between shape and process parameters of extruded materials. The process parameters applied to this simulation are the friction coefficient between the two materials and the angle of the die, and the thickness variation and uniformity of the clad material after extrusion were investigated. From the simulation results, as the friction coefficient of the matrix and the clad material increases, the clad layer thickness of the extruded material becomes close to the theoretical value and exhibits a uniform value.