鋼のデンドライトの形態およびアームの間隔について

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タイトル別名
  • Dendrite Morphology and Arm Spacing of Steels
  • コウ ノ デンドライト ノ ケイタイ オヨビ アーム ノ カンカク ニ ツイテ

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説明

An experimental study has been carried out to investigate the effect of growth variables on dendrite morphology and dendrite arm spacing in 25Cr-20Ni stainless steel and 1Cr-0.25Mo steel, solidified vertically under semi-steady state conditions.<BR>The condition for cell formation and the cell to dendrite transition has been determined quantitatively for stainless steel. Dendrite morphology changes from a simple one to complicated cruciform with the increase of growth rate V and the decrease of temperature gradient G. It is shown that there exists the critical values of G⁄V, below which secondary or tertiary dendrite arms are formed. It follows that the formation of dendrite arms in higher order is governed by the same parameter as in case of the cell to dendrite transition.<BR>Primary dendrite arm spacing is proportional to 1⁄G0.4V0.2, while the size of cellular substructure is proportional to 1⁄GV. Both secondary arm spacing and tertiary one depend upon the cooling rate.

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  • 日本金属学会誌

    日本金属学会誌 33 (6), 658-663, 1969

    公益社団法人 日本金属学会

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