Quantitative evaluation of segregation using spectral analysis.
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概要
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A statistical method for quantitativeevaluation of segregation is introduced. The method is used to evaluate the dendrite arm spacing, objectively. Two indices which are quantitative measures of the spacing and intensity of segregation are newly proposed and are employed in the quantitative evaluation of center segregation and intergranular segregation. The effects of electromagnetic stirring (EMS) and calcium treatment on segregation are studied. The equiaxed structures formed by the application of EMS and by low casting speed in continuous casting steel slabs are quantitatively compared with each other.From the examination of the specimens the following results have been obtained.(1) Intergranular segregation is intensified by the application of EMS, even though the center segregation is suppressed.(2) The equiaxed structure brought about by EMS is finer than the one caused by low casting speed.(3) Calcium treatment is very effective in suppressing both the center segregation and the intergranular segregation of sulfur.
- The Iron and Steel Institute of Japanの論文
The Iron and Steel Institute of Japan | 論文
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