オーステナイト中でのセメンタイト粒子のオストワルド成長

概要

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The coarsening of cementite particles in an austenite matrix has been studied in Fe-C, Fe-C-Cr, and Fe-C-Mo alloys. A quantitative metallographical technique was used to estimate the particle size distribution and the mean particle size. The observed growth rate was analysed using the Lifshitz-Wagner theory. It was found that the coarsening process was fairly well explained by the diffusion controlled growth mechanism. A special interest was taken to examine the effect of alloying elements on the coarsening rate of cementite particles. The coarsening rate considerably decreased by a small addition of substitutional alloying elements. In ternary systems such as Fe-C-Cr and Fe-C-Mo alloys, the growth rate was found to be controlled by the diffusion of substitutional solute in the matrix as predicted by BJORKLUND, DONAGHEY and HILLERT.
社団法人日本鉄鋼協会の論文
1974-12-01