Rev. Met. Paris
Volume 90, Number 7-8, Juillet-Août 1993
|Page(s)||895 - 902|
|Published online||24 January 2017|
The influence of the groove series when hot rolling crack sensitive steel grades*
Influence de la séquence des cannelures sur le laminage à chaud de nuances d'acier sensibles aux fissures
In a research project at Mefos (The Foundation for Metallurgical Research), a study of the groove series influence on the amount of surface defects when hot rolling crack sensitive steel grades, has been done. The trials have been carried out in two rolling campaigns. Three different steel grades have been tested X210CrW12, 100Cr6 and a boron steel. Two different groove series were calibrated, a Swedish oval-square series and an oval-roundoval series. The total area reduction for both series was around 4:1.
Surface inspections have been done visually and in a Thermo-Matic billet inspection equipment at Ovako Profiler in Lulea, before and after rolling. Visual inspections did not show any particular difference when comparing the groove series.
The Thermo-Matic billet inspection revealed some differences. The oval-roundoval series is less harmful to the surfaces than the Swedish oval-square series.
© La Revue de Métallurgie 1993
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