Process Variables in Direct Extrusion
Process variables in direct extrusion.
The die angle (), reduction in crosssection
or extrusion ratio (R),
extrusion speed, billet temperature,
and lubrication all affect the
extrusion pressure.
f
o
A
A
R
R ~ 40:1 for hot extrusion of steels.
R ~ 400:1 for aluminium.
The degree of deformation imparted to the billet is determined by extrusion ratio (R)