This paper presents the possibility of restoration of worn contact surfaces of rollers for continuous casting of steel. Permanent effort of steel producers to extend the lifespan of these components requires the implementation of new ?ller materials or modifying technological renovation processes to reduce the economic costs. This matter seems to be very important for the world leaders in steel production, e.g., ArcelorMittal, Tata Steel, but also for smaller concerns such as Magnitogorsk Iron and Steel Works, Salzgitter, etc. Renovation of continuous steel casting rollers, made of X12Cr13 EN 10088-1-97, was realised using submerged arc surfacing technology. Worn surface of roller was machined and surfaced using one interlayer and two cover layers. The quality of deposited layers was veri?ed using non-destructive and destructive tests. The in?uence of ?ller material on the tribological properties of contact surfaces of deposited layers was analysed by abrasive wear test. Studies were made in the in?uence of surfacing parameters on cladding metal mixing (mixed) with base metal and also in?uence of heat introduced by welding using metallographic analysis. The experiments con?rmed very good wear resistance of the applied ?ller metal due to dispersion strengthening caused by ?nely dispersed carbides and nitrides in the weld coating. The measures to be taken into account in renovation of rollers using hard surfacing, as well as the development of research in this area were also given. The experiments have con?rmed that parameters used are suitable for studying ?ller materials.
展开▼
