چكيده به لاتين
Today, the formation of multi-metal pipes has attracted the attention of many researchers due to its wide range of applications such as high electrical conductivity, corrosion resistance, high strength and acceptable resistance to abrasion in various industries. These tubes make it possible to combine metals with different materials and properties. These pipes are produced in different ways. One of the most common methods for the production of these tubes is the process of severe plastic deformation (SPD), which improves the mechanical and metallurgical properties of the pipes. In this study, the bimetallic tubes produced by the Parallel tubular channel angular pressing process (PTCAP) are examined; the effect of ultrasonic vibrations applied in this process is also investigated. In this process, the bimetallic pipe is extruded because of the movement of the mandrel into the angular channels of the tube with two cutting areas of the same axis and plastic deformation occurs which causes improvement in pipes properties. Vibrations reduce the force required to form. Due to its high corrosion resistance, good electrical conductivity and good ductility, aluminum is a good choice for creating bimetallic tubes with copper. In this study, Abacus software is used to simulate the process and to investigate the effects of different parameters during the process. An experimental micro-hardness test is also performed on these tubes. After the process, the hardness of the copper and aluminum samples increases compared to the annealing state, and the simulation results show a decrease in the forming force due to the use of ultrasonic vibrations.
