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GUO Xuming, QIAN Bainian, WANG Yu. Effects of nonmetallic inclusions on acicular ferrite nucleation in deposited metals of microalloyed steel[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2007, (12): 5-8,12.
Citation: GUO Xuming, QIAN Bainian, WANG Yu. Effects of nonmetallic inclusions on acicular ferrite nucleation in deposited metals of microalloyed steel[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2007, (12): 5-8,12.
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Effects of nonmetallic inclusions on acicular ferrite nucleation in deposited metals of microalloyed steel

  • 1.

    Department of Material Engineering, Shenyang Institute of Aeronautic Engineering, Shenyang 110034, China

  • 2.

    Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China

  • 3.

    Shenyang Institute of Special Equipment Inspection & Research, Shenyang 110035, China

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  • Received Date: March 14, 2006
    Graphical Abstract
    • Abstract
  • The effects of the size, distribution and chemical composition of inclusions on nucleation of acicular ferrite in deposited metals of micro-alloyed steel were studied.The results show that the inclusions as nuclei of acicular ferrite are chemical heterogeneous compounds containing various elements.Most of them are within 0.2-0.6 μm in diameter.The inclusions reduce the energy barrier to nucleation by acting as high-energy inert substrates, promoting the nucleation of acicular ferrite.The primary acicular ferrite plates initially nucleate at intragranular inclusions and then many fine interlocked acicular ferrite grains nucleate sympathetically and grow from the primary plates.
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