ナノインデンテーション法による製鉄用コークスの微視組織の機械的性質評価(コークス強度評価技術の新展開,<特集>劣質な石炭のコークス化機構解析とコークス強度評価)

概要

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The elastic modulus of coke matrix is measured with a nano-indentation method to investigate the effect of coal brands, blending conditions, coking temperature and holding time at the final coking temperature on the mechanical property. The elastic moduli of active component and inert carbonized at 880℃ are 26-28 GPa and 45-48 GPa, respectively, regardless of coal brands and blending conditions. The rise in the final coking temperature increases the elastic moduli of both active component and inert. In addition, the elastic moduli of active component are smaller than those of inert. Until the final coking temperature reaches 850℃, the elastic modulus of active component and inert increases with an increase in the holding time. On the other hand, if the final coking temperature is above 850℃, the elastic modulus is hardly dependent on holding time. The elastic modulus of matrix of fusinite is smaller than that of isotropic inert because fusinite has a large amount of small pores. The true elastic modulus of matrix of fusinite is almost equal to that of isotropic inert.
社団法人日本鉄鋼協会の論文
2006-03-01