محكاه لعملية بثق أمامي لمعدن النحاس تم إنتاجه بواسطة عملية الايكاب

Abstract

In this paper, a simulation study of the forward extrusion process of three types of copper metal produced from the ECAP process was studied. A rolling operation was conducted on two of them, and they are as follows: 1- A commercial high purity Cu (99.99%) rod of 10 mm in diameter was processed using the equal channel angular pressing (ECAP) method. This metal was named as (ECAP – Cu). 2- ECAP Cu subjected to a 1180 % cold rolling at the liquid nitrogen temperature (LNT). This metal was named as (ECAP Cu + 1200-LNT). 3- ECAP Cu subjected to a 1340 % cold rolling at the liquid nitrogen temperature (LNT), and this metal was named as (ECAP Cu + 1350-LNT). The true stress true strain of the three metals were calculated and entered into the simulation program to calculate: extrusion load, flow stress and equivalent strain for the three metals when extruded into dies with extrusion channels having lengths of 3 mm, 6 mm, and 9 mm. With a proven percentage of reducing in the extrusion process from a diameter of 16 mm to a diameter of 10 mm. From practical experiments conducted on copper metal, it was noted that: • Its mechanical properties have changed and it has a high strength, as well as the amount of yield stress has increased • The greater the percentage of shortening in the rolling process, the greater the yield stress. • From the simulation process, it was found that the values of the extrusion load, the equivalent strain, and the flow stress have changed and increased