Four types of lubricant, i.e., dry film, liquid, powdered solid and liquid with powdered solid lubricants, were evaluated for cold extrusion of sintered copper powder preforms. Effects of the lubricants on extrusion pressure, densification and crack formation were examined with respect to variations of density of the preforms, extrusion ratio and die angle. It was found that liquid and liquid with powdered solid lubricants were not suitable for extrusion of sintered preforms.

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