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In-Situ Observation and Formation Mechanism of Iron Surface Oxidation in the Initial Stages at 1,150 °C

Steel is an irreplaceable material in the modern world, and the world crude steel production in 2017 was 1691.2 Mt. [1] Because the steel is exposed to air at high temperatures during conventional hot-rolling processes, iron oxide scales are inevitably formed. There are three kinds of oxide scales: primary scale, secondary scale, and tertiary scale depending on the formation location. [2•13] Scale formation can lead to uneven roll wear and strip shape defects, and it is also a source of surface defects. [14, 15] During cooling after coiling the oxide scale can grow and also undergo structural changes. [7, 15] Any iron oxidation represents yield loss and the surface scales can sometimes affect the downstream cold rolling and the pickling process. [2]
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2019 AISTech Conference Proceedings
PR-377-166
Ming Zhong1, Yining He1, Elyce Milligan1, Chris Pistorius1, Bryan Webler1
May 01, 2019
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