Continuous reduction of the oxide scale of hot-rolled steel strip in hydrogen. (25th November 2016)

• Record Type: Journal Article
• Authors: Guan, C.; Li, J.; Tan, N.; Zhang, S.-G.
• Is Part Of: Ironmaking & steelmaking. Volume 43:Number 10(2016)
• Page Start: 739
• Page End: 743
• Publication Date: 2016-11-25
• Subjects: Hot-rolled steel -- Oxide scale -- Hydrogen reduction -- Acid-free pickling; Iron industry and trade -- Periodicals; Steel industry and trade -- Periodicals; 669.1
• DOI: 10.1080/03019233.2016.1208985
• Languages: English
• ISSNs: 0301-9233

Abstract

Abstract : The continuous reduction in the oxide scale of hot-rolled steel strip in H2 –N2 atmosphere was simulated in laboratory. Scale specimens were reduced in 20% H2 –N2 or 50% H2 –N2 atmosphere. The sample weight losses were measured after soaking at 550, 700 and 800°C. In both atmospheres, specimen reduced at 700°C showed the minimum weight loss after soaking for 240 s. At 700 and 800°C, higher hydrogen concentration accelerated the reaction in the beginning of soaking, but had little effect once the dense-reduced iron layer formed. While at 550°C, the reduced iron kept growing in porous structure and the weight loss rate increased significantly in higher H2 concentration.