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Indexed by:期刊论文

Date of Publication:2012-08-01

Journal:OXIDATION OF METALS

Included Journals:SCIE、EI、Scopus

Volume:78

Issue:1-2

Page Number:145-152

ISSN No.:0030-770X

Key Words:Steel; Oxidation; Compressive stress; Magnetite; Wustite; Cooling

Abstract:During hot rolling, the existence of a wustite layer is favored from the standpoint of improved descaling performance. In this work, the mutual effect of external compressive stress and cooling on the phase transformation of oxide scales formed on steel was investigated. Optical microscopy images showed that a fast cooling rate of about 80 A degrees C/min promoted the formation of magnetite/Fe eutectoid. When applying a compressive stress, growth of the magnetite/Fe eutectoid was increased. It was inferred that the promoting effect of fast cooling rate on the diffusion is advantageous to the growth of magnetite/Fe eutectoid. The increase of system chemical potential by the compressive stress also promoted the growth of magnetite/Fe eutectoid.