ISSN:
1662-8985
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
Steel strip surface oxidation during hot mill processing represents an industrial andenvironmental problem: secondary oxide is removed after roughing, but tertiary oxide scalesalready start to form before entering the finishing stands. Their properties affect the final steelsurface quality and its response to further processing. Controlling the oxide layer growth kineticsand mechanical properties can make pickling easier and improve downstream behaviour. A thinwustite-dominated scale layer (〈20 μm) is created under controlled conditions in an originallaboratory device adequately positioned in a compression test machine to investigate plane straincompression. A first series of oxidation tests were performed on a ULC steel grade to measure thekinetics of oxide scale growth. The samples were first heated up under a protective atmosphere(nitrogen), before being oxidised in air at different temperatures for various oxidation times. Theseexperiments can be considered fair quantitative and qualitative simulations of scale growth as itoccurs in a hot strip mill, insofar as the results thus obtained are in good agreement with theliterature. After the oxide growth, plane strain compression (PSC) was performed immediately tosimulate the hot rolling process. The oxide layers were characterised before and after compressiontests by optical and secondary electron microscopy. As expected, the oxide is seen to deform duringcompression. The obtained oxide layers exhibit good adhesion to the substrate and homogeneityover the thickness, even after compression
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/01/39/transtech_doi~10.4028%252Fwww.scientific.net%252FAMR.15-17.732.pdf
Permalink