Unidirectional Solidification of 9%Ni Cast Steel in Rotary Magnetic Field

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  • Mohri Masakazu
    Hitachi Zosen Corp. Present address: Hitachi Zosen Technical Research Laboratory, Inc. Osaka
  • Kitazawa Kohji
    Hitachi Zosen Corp. Present address: Hitachi Zosen Technical Research Laboratory, Inc. Osaka

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Other Title
  • 回転磁界型電磁撹拌場内における9%Ni鋳鋼の一方向凝固
  • 回転磁界型電磁攪拌場内における9%Ni鋳鋼の1方向凝固
  • カイテン ジカイガタ デンジ カクハン バナイ ニ オケル 9パーセント

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Abstract

The solidification structure of 9%Ni cast steel and the effect of electro-magnetic stirring on its structure and mechanical property were examined.<BR>9%Ni molten steel was poured into an exothermic mold and was solidified unidirectionally without stirring. Using the ingot, measurements were made of the primary and secondary dendrite arm spacings. Next, 9%Ni molten steel was solidified unidirectionally in a rotary magnetic field. The relation ship between primary arm spacing(S1; μm), secondary dendrite arm spacing(S2; μm) and average cooling rates (Va; K/s) was as follows:<BR>(This article is not displayable. Please see full text pdf.) <BR>And it was also confirmed that the as-cast ductility was greatly improved by this stirring, though this cast steel grade had no ductility as cast.

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