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| Recent Development of Vanadium Microalloying Technology |
| YANG Cai-fu |
| Central Iron and Steel Research Institute, Beijing 100081, China |
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Abstract Recent developments of V microalloying technology and its applications in HSLA steels were reviewed. Enhanced-nitrogen in V-containing steel can promote precipitation of fine V(C, N) particles, and improve markedly precipitation strengthening effectiveness of vanadium, therefore, there is a significant saving of V addition in the same strength requirement. Vanadium can be used effectively for ferrite grain refinement by the nucleation of intragranular ferrite promoted by VN precipitates in Austenite. Nanoscale V(C, N) particles can be precipitated in bainitic ferrite matrix over a broad temperature, and the precipitation strengthening might be successfully applied in bainitic steels. V-N process is a cost-effective way for high strength rebars, section steels, forging steels and thin slab direct rolling strips.
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Received: 24 December 2012
Published: 18 April 2013
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2013, Vol. 48 
