熱放射の寄与を正確に考慮した溶融連続鋳造パウダーの熱拡散率測定

概要

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Thermal diffusivity measurements of continuous casting powders for steel have systematically been made at high temperature by applying the differential three layered laser flash method recently proposed by the present authors. The powder consists of SiO_2, Al_2O_3, MgO, CaO, Na_2O and CaF_2. New data processing has also been developed in order to separate the contribution due to radiative component from measured values at high temperature by considering the variation of the absorption coefficients of these powders when adding TiO_2, ZrO_2 or iron oxide. Then, the thermal diffusivity values of continuous casting powders for steel were quantitatively estimated with sufficient reliability. Thermal diffusivity values of continuous casting powders are found to be 4±0.5×10^<-7>m^2/s and insignificant with the variation of temperature and concentration presently investigated. It would be interesting to extend the present systematic results for discussing the heat transfer phenomena in the continuous casting process for steel.
社団法人日本鉄鋼協会の論文
1994-06-01