Process chain for the manufacture of hybrid bearing bushings

Abstract The current study presents a novel Tailored Forming process chain developed for the production of hybrid bearing bushings. In first step, semi-finished products in form locally reinforced hollow profiles were produced using new co-extrusion process. For this purpose, modular tool concept was which steel tube made case-hardening steel, either C15 (AISI 1015) or 20MnCr5 5120), is fed laterally into tool. Inside welding chamber, joined with extruded aluminum alloy EN AW-6082. second sections from compound formed bushings by die forging. order to set required forming temperatures each material—aluminum and steel—simultaneously, tailored heating strategy developed, enabled successful forging workpiece desired bushing geometry. Using steels combination aluminum, it possible produce intact bushings, showed both macroscopically microscopically intimate material contact inside zone.