Investigations on tailored forming of aisi 52100 as rolling bearing raceway

verfasst von

Timm Coors, Maximilian Mildebrath, Christoph Büdenbender, Felix Saure, Mohamad Yusuf Faqiri, Christoph Kahra, Vannila Prasanthan, Anna Chugreeva, Tim Matthias, Laura Budde, Florian Pape, Florian Nürnberger, Thomas Hassel, Jörg Hermsdorf, Ludger Overmeyer, Bernd Breidenstein, Berend Denkena, Bernd Arno Behrens, Hans Jürgen Maier, Gerhard Poll

Abstract

Hybrid cylindrical roller thrust bearing washers of type 81212 were manufactured by tailored forming. An AISI 1022M base material, featuring a sufficient strength for structural loads, was cladded with the bearing steel AISI 52100 by plasma transferred arc welding (PTA). Though AISI 52100 is generally regarded as non-weldable, it could be applied as a cladding material by adjusting PTA parameters. The cladded parts were investigated after each individual process step and subsequently tested under rolling contact load. Welding defects that could not be completely eliminated by the subsequent hot forming were characterized by means of scanning acoustic microscopy and micrographs. Below the surface, pores with a typical size of ten µm were found to a depth of about 0.45 mm. In the material transition zone and between individual weld seams, larger voids were observed. Grinding of the surface after heat treatment caused compressive residual stresses near the surface with a relatively small depth. Fatigue tests were carried out on an FE8 test rig. Eighty-two percent of the calculated rating life for conventional bearings was achieved. A high failure slope of the Weibull regression was determined. A relationship between the weld defects and the fatigue behavior is likely.

Organisationseinheit(en)

Institut für Maschinenkonstruktion und Tribologie
Institut für Werkstoffkunde
Institut für Umformtechnik und Umformmaschinen
Institut für Fertigungstechnik und Werkzeugmaschinen

Externe Organisation(en)

Laser Zentrum Hannover e.V. (LZH)

Typ

Artikel

Journal

Metals

Band

10

Seiten

1-19

Anzahl der Seiten

19

ISSN

2075-4701

Publikationsdatum

13.10.2020

Publikationsstatus

Veröffentlicht

Peer-reviewed

Ja

ASJC Scopus Sachgebiete

Werkstoffwissenschaften (insg.)

Elektronische Version(en)

https://doi.org/10.3390/met10101363 (Zugang: Offen)