نوع مقاله : علمی و پژوهشی
نویسندگان
ایرانی
چکیده
عنوان مقاله [English]
نویسندگان [English]
In present research, the graphitization behaviour of the hypereutectoid steel CK100 with the initial martensitic microstructure has been studied. The optical and scanning electron microscopic observations showed that the graphite particles were formed within the ferritic matrix due to the dissociation of carbides during annealing of the martensitic steel. The graphitization behaviour of the steel was examined at various temperatures using the dilatometric tests, and the results obtained from these tests were consistent with those predicted by the Johnson-Mehl-Avrami equation. Moreover, the TTT diagram corresponding to the graphitization phenomenon was obtained from the results of dilatometric tests and then, the optimum temperature of the graphitization was determined.
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