An Aluminum alloy billet with Diameter of 277mm and Length of 563mm is to be extruded using direct extrusion at temperature above the recrystallization temperature to solid bar of a diameter of of 52mm. If the extrusion lubrication was poor, the Johnson equation, a = 0.8 and b = 1.4, the ram speed is 84mm/s and the materials constants are K=365MPa, n=0.31, C=219MPa and m = 0.19, then find the power needed for the process (W)
Sample Solution
