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| THE FINE STRUCTURE OF Nb AND V PRECIPITATES IN Nb-V STEEL |
| XU Wenchong; SUN Fuyu (Central Iron and Steel Research Institute; Ministry of Metallurgical Industry; Beijing) |
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Cite this article:
XU Wenchong; SUN Fuyu (Central Iron and Steel Research Institute; Ministry of Metallurgical Industry; Beijing). THE FINE STRUCTURE OF Nb AND V PRECIPITATES IN Nb-V STEEL. Acta Metall Sin, 1983, 19(6): 29-118.
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Abstract The precipitation of Nb and V in Nb-V steel has been investigated by means of STEM and EDAX. It Was found that a complex ordered carbonitride is formed on hot-rolling and continuous cooling by the precipitation of Nb and V together with C and N in which the contents of Nb and V are changeable. Its concentration ratio, C_(Nb)/C_v, decreases with the decrease of the grain size precipitated. The stoichiometric formula of the precipitate may be (Nb, V) (C_(1-x), N_(1-y)). Electronic microscopic observation revealed that both the morphology characteristics and the crystallographic orientation of the precipitate seem to be identical with ones either in the Nb- or V-steel.
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Received: 18 June 1983
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