CHARACTERIZATION OF THE IONIC NITRING IN THE PROCESS APPLICATION ON 12% Cr STEELS FOR TOOLS AND COLD DEFORMATION DEVICES MANUFACTURING
Journal Title: Journal of Science And Arts - Year 2009, Vol 10, Issue 1
Abstract
The ionic nitriding found a good application in the treatment of cold deformation devices that, because of the hard work conditions, must stand complex loads and show superior phzsicomechanical properties. For example, the working rolls of plate cold rolling mills must stand loads with specific tensions of 1000-2000N/m2, must present hardness of 60 HRC, a very good toughness (a high rotatingb bending fatigue strength), must stand to outstanding dynamic tests (impacts, torsion) and must present a high wer hardness and outstanding tribological properties. The good behaviour in exploitation of these devices is conditioned by severe adjustments, high dimensional accuracy and the absence of clearance in gear system, reason for that the dimensional restrictions to the manufacturing of deformation devices are very exigent. So, for cold working are used special high-speed steels, maraging steels and very often (being more accessible) steels with 12% Cr. This article analyses the possibility of applyng the ionic nitriding to steels with 12% Cr, referring to VMoC120, pursuing the way of hardening by this supplemental treatment the working surface of the deformation devices, so that they meet the quality requirements.
Authors and Affiliations
Gheorghe Vlaicu, Iulian Bancuta, Valerica Cimpoca, Ioana Dulama, Anca Gheboianu, Mariana Bahrim, Ion Popescu
Keywords
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