Effect of Ca on Grain Size and Toughness in CGHAZ of C-Mn Steel

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Abstract:

Through adding enough calcium to C-Mn steel, the second phase particles of CaO can be found in C-Mn steel. The microstructure, the grain size and the toughness of CGHAZ in micro-calcium steel and no micro-calcium steel were studied by TEM, SEM and series impact experiment. The research shows that: the second phase particles CaO in micro-calcium steel have strong pinning force to grain boundary of CGHAZ; the second phase particles can retard grain growth in the course of welding in micro-calcium steel, fining grain at CGHAZ and improving the toughness of CGHAZ in micro-calcium steel.

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Periodical:

Advanced Materials Research (Volumes 291-294)

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886-889

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Online since:

July 2011

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© 2011 Trans Tech Publications Ltd. All Rights Reserved

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