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Vol.25, No.12, 882 ~ 890, 1987
Title
Study on the Ostwald Ripening Characteristics of iron Carbide Particles with respect to Various Shape Factors of Precipitates
이상윤Sang Yun Lee, 최진원Jin Won Choi
Abstract
The coarsening of cementite particles in a ferrite matrix has been studied in Fe-C steel. A series of spheroidizing temperatures between 650℃ and 710℃ and spherodidzing times of up to 360 hrs. has been used. The effect of ordering of particles on their size distribution function has been studied by means of normalizing method developed for studying the Ostwald ripening kinetics. Particle size distribution curves have been determined and the coarsening curves have been obtained from the mean radius value. It has been shown that the transition from a statistically uniform particle distribution of the disperse phase to an orderly distribution along grain boundary has produced all increase in the mean relative radii of precipitates and a shift of the distribution function maximum toward larger relative particle sizes.
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