Cold extruding parts
Cold extrusion is a push-through compressive forming process with the starting material (billet/slug) at room temperature. This article provides information on the different types of steels that can be cold extruded. Mechanical presses and hydraulic presses that are specifically designed for cold extrusion with high rigidity, accurate alignment, and long working strokes are described. The article details the factors that are critical in cold extrusion: punch design, die design, and tool design.
High mechanical properties.
High surface finish
No oxidation at metal surface.
High extrusion ratio (It is the ratio of billet cross section area to extruded part cross section area).
It can easily create complex cross section.
This working can be done with both brittle and ductile materials.
High mechanical properties can achieved by cold extrusion.