Process chain for the manufacture of hybrid bearing bushings

authored by: Susanne Elisabeth Thürer, Anna Chugreeva, Norman Heimes, Johanna Uhe, Bernd Arno Behrens, Hans Jürgen Maier, Christian Klose
Abstract: The current study presents a novel Tailored Forming process chain developed for the production of hybrid bearing bushings. In a first step, semi-finished products in the form of locally reinforced hollow profiles were produced using a new co-extrusion process. For this purpose, a modular tool concept was developed in which a steel tube made of a case-hardening steel, either C15 (AISI 1015) or 20MnCr5 (AISI 5120), is fed laterally into the tool. Inside the welding chamber, the steel tube is joined with the extruded aluminum alloy EN AW-6082. In the second step, sections from the compound profiles were formed into hybrid bearing bushings by die forging. In order to set the required forming temperatures for each material—aluminum and steel—simultaneously, a tailored heating strategy was developed, which enabled successful die forging of the hybrid workpiece to the desired bearing bushing geometry. Using either of the case-hardening steels in combination with aluminum, this novel process chain made it possible to produce intact hybrid bearing bushings, which showed both macroscopically and microscopically intimate material contact inside the compound zone.
Organisation(s): Institute of Materials Science
Institute of Metal Forming and Metal Forming Machines
Type: Article
Journal: Production Engineering
Volume: 15
Pages: 137-150
No. of pages: 14
ISSN: 0944-6524
Publication date: 04.2021
Publication status: Published
Peer reviewed: Yes
ASJC Scopus subject areas: Mechanical Engineering, Industrial and Manufacturing Engineering
Electronic version(s): https://doi.org/10.1007/s11740-021-01028-4 (Access: Open)
: Details in the research portal "Research@Leibniz University"

BibTeX

@article{0ac540ee9632447ea209888d476cf3db,
title = "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 a first step, semi-finished products in the form of locally reinforced hollow profiles were produced using a new co-extrusion process. For this purpose, a modular tool concept was developed in which a steel tube made of a case-hardening steel, either C15 (AISI 1015) or 20MnCr5 (AISI 5120), is fed laterally into the tool. Inside the welding chamber, the steel tube is joined with the extruded aluminum alloy EN AW-6082. In the second step, sections from the compound profiles were formed into hybrid bearing bushings by die forging. In order to set the required forming temperatures for each material—aluminum and steel—simultaneously, a tailored heating strategy was developed, which enabled successful die forging of the hybrid workpiece to the desired bearing bushing geometry. Using either of the case-hardening steels in combination with aluminum, this novel process chain made it possible to produce intact hybrid bearing bushings, which showed both macroscopically and microscopically intimate material contact inside the compound zone.",
keywords = "Co-extrusion, Die forging, Hybrid bulk metal component, Tailored forming",
author = "Th{\"u}rer, {Susanne Elisabeth} and Anna Chugreeva and Norman Heimes and Johanna Uhe and Behrens, {Bernd Arno} and Maier, {Hans J{\"u}rgen} and Christian Klose",
note = "Funding Information: The results presented were obtained within the subprojects A1 “Influence of local microstructure on the formability of extruded composite profiles” and B2 “Die forging of coaxially arranged hybrid workpieces” of the Collaborative Research Center 1153 “Process chain to produce hybrid high performance components by Tailored Forming”—252662854, which is supported by the German Research Foundation (DFG).",
year = "2021",
month = apr,
doi = "10.1007/s11740-021-01028-4",
language = "English",
volume = "15",
pages = "137--150",
journal = "Production Engineering",
issn = "0944-6524",
publisher = "Springer Verlag",
number = "2",
}