ժҪ The microstructure development of oxide scale on pure iron under the mutual effect of compressive stress and cooling conditions was investigated. Oxide-scale structure was examined by optical microscopy (OM) and scanning electron microscopy (SEM). It was found that oxide scale formed under normal cooling conditions had a structure mainly consisted of an outer magnetite and an inner w��stite layer. When a compressive stress was applied, numerous magnetite precipitates formed within w��stite layer homogeneously at starting cooling temperature of 900��, and the w��stite layer in the scale transformed into a mixture of mostly magnetite/iron eutectoid and magnetite layer at starting cooling temperature of 700��. The w��stite decomposition and precipitation of magnetite in w��stite under compressive stress was discussed.
Abstract��The microstructure development of oxide scale on pure iron under the mutual effect of compressive stress and cooling conditions was investigated. Oxide-scale structure was examined by optical microscopy (OM) and scanning electron microscopy (SEM). It was found that oxide scale formed under normal cooling conditions had a structure mainly consisted of an outer magnetite and an inner w��stite layer. When a compressive stress was applied, numerous magnetite precipitates formed within w��stite layer homogeneously at starting cooling temperature of 900��, and the w��stite layer in the scale transformed into a mixture of mostly magnetite/iron eutectoid and magnetite layer at starting cooling temperature of 700��. The w��stite decomposition and precipitation of magnetite in w��stite under compressive stress was discussed.
ZHOU Chang-hai Hai-tao MA Lai WANG. Effect of Compressive stresses on Microstructure of Scales Formed on Pure Iron Under Continuous Air Cooling[J]. �й������ڿ���, 2010, 17(2): 27-27.
ZHOU Chang-hai Hai-tao MA Lai WANG. Effect of Compressive stresses on Microstructure of Scales Formed on Pure Iron Under Continuous Air Cooling. Chinese Journal of Iron and Steel, 2010, 17(2): 27-27.