Community Research and Development Information Service - CORDIS


Car wheel discs are conventionally made from unalloyed steels for general structural applications, produced in the form of hot-rolled wide strip. Service and fabrication properties are determined partly by the hot rolling operation and partly by cold working. The key service property is fatigue strength, which depends on the properties of the material in the cold-worked condition and on disc design. Hot-rolled wide strip with a thickness of roughly 4 mm is required. The aim of the research project was to examine what reductions in thickness could be achieved by using quenched and tempered wheel discs made from low-carbon fine-grain steels capable of water quenching and tempering. The results of laboratory investigations show that the fatigue strength under reversed bending of the water-quenchable fine-grain steels can be more than twice that of the reference steel R St 37-3. For this to be the case, the skin produced by heat treatment must be removed by machining or else the notching effects caused by the skin must be offset by shot peening of the surface.

Additional information

Authors: KRUPP STAHL AG, Krupp Stahl AG, Bochum (DE)
Bibliographic Reference: EUR 12863 DE (1990) 80 pp., FS, ECU 25
Availability: (2)
ISBN: ISBN 92-826-1557-X
Record Number: 199011380 / Last updated on: 1994-12-01
Original language: de
Available languages: de
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