Forging and Hot Pressing

Abstract

POWDER FORGING AND HOT PRESSING processes are similar in terms of their external physical characteristics. Each process involves the simultaneous application of pressure and heat to consolidate powders to full, or nearly full, density. Both processes occur within a die that gives shape to the final densified component. At a more detailed level, forging and hot pressing are significantly different. Forging involves the deformation of a powder preform in which considerable lateral flow occurs Forging is carried out on high-speed presses that are automated for mass production. Hot pressing, on the other hand, involves compression of loose powder or a powder compact fitted tightly in the die cavity, similar to repressing, resulting in very little lateral deformation. Hot pressing generally is carried out at very low deformation rates in hydraulic presses. Two mentions of aluminum and one of 6061.