Wälzfestigkeitseigenschaften induktiv randschichtgehärteter bauteilähnlicher Proben und Bauteile

FKM 1998 Issue No. 232 Project No. 180
Abstract:

The subject of this report is the experimental investigation of the fatigue behavior of inductively surface-hardened rolling elements under rolling load. The rolling elements made of the materials 42CrMo4 V, Ck45 N, 100Cr6 GKZ were inductively surface hardened for use in a ZF roller test rig. Both the heating conditions and the tempering conditions were varied in order to assess the rolling strength properties of different microstructures after short-term austenitization. The uniformly selected hardening depth ensured that rolling fatigue (pitting, microstructural changes) only occurred in the hardened surface layer. In the rolling test, the deformations of the test rollers were determined in addition to the service lives achieved up to pitting at different surface pressures. Furthermore, the residual stress and retained austenite distributions were determined radiographically according to different rolling numbers. In accompanying metallographic investigations, the structural changes typical of roller fatigue were recorded and compared with the calculated load stress distributions. As a result, the correlations between rolling strength properties and short-time austenitization conditions on induction surface hardened components are shown for the first time.


Scope of report:
141 p., 129 ill., 60 lit.

Start of work:
01.07.1993
End of work:
31.12.1997
Funding body:
Stiftung Stahlanwendungsforschung A 74

Research center:
Institute of Materials Science, Technical University of Darmstadt

Head:
Prof. Dr.-lng. K. H. Kloos (until 31.03.1995) Prof. Dr.-lng. C. Berger (from 01.04.1995)
Editor and author:
Dipl.-lng. J. Rollmann
Chairman of the working group:
E. Schreiber FAG, Schweinfurt
Chairman of the advisory board:
Prof. Dr.-lng. H. Kipphan Heidelberger Druckmaschinen AG, Heidelberg