Effect of Vanadium-Nitrogen Concentration and Cooling Rate on Grain Refinement in V-N Steel

Abstract:

Effect of vanadium and nitrogen concentration in V-N steel and cooling rate after deformation on grain refinement has studied in this paper. The results show that with the increase of vanadium and nitrogen concentration, ferrite grain size is smaller compared with carbon steel; with the increase of cooling rate after deformation, ferrite grain size is finer and pearlite content of microstructure significantly is reduced too. Compared with the Nb-bearing steel, as long as selecting reasonable the process parameters and adding the appropriate vanadium, nitrogen to the steel, V-N steel can also get a good strength and toughness, and the cost is lower than Nb-bearing steel. This method of producing the steel with good Strength and toughness is very suitable to China who possesses the abundant vanadium resource, but is lack of niobium.

• Periodical: Advanced Materials Research (Volumes 538-541)
• Pages: 1138-1144
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.538-541.1138
• Online since: June 2012
• Authors: Xiao Fang Shi, Li Zhong Chang, Chun Feng Jiang, Lin Bao Liang
• Keywords: Cooling Rate, Ferrite Grain, Strength and Toughness, V-N Steel

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