Effect of Chromium and Manganese on the Formations of Graphite and Carbide on the surface of Low Carbon Sheet Steels

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Effect of Chromium and Manganese on the Formations of Graphite and Carbide on the surface of Low Carbon Sheet Steels. Surface graphite and surface carbide are two surface defects observed in cold-rolled low carbon steel sheets after batch annealing under non-oxidising atmosphere. The surface defects detract from the appearance of the steel sheets and diminish the surface treatment potential of the sheets, causing significant and costly material losses. The aims of the project are to study the inhibition of surface graphite formation by the additions of Chromium and Manganese and to study the mechanism of formation of surface carbide with the aim of developing an alloying / processing strategy which eliminates both the surface graphite and the surface carbide.