Effect of V(C,N) Master Alloy on the Grain Size of Low Carbon High Strength Bainite Steel

Abstract:

The V(C,N) nanometer powder master alloy was added into a low carbon high strength bainite steel to refine grain size, and its refinement action with that of Ti addition was compared. The experimental specimens were melted in 25kg induction furnace with 0.03%Ti, 0.15%, 0.24%, 0.31% and 0.50% V(C,N) addition, respectively. The specimens were observed by optical microscope, XRD and EDS. The results showed that 0.03%Ti addition refined to the grain size to 13μm-18μm in the research steel, but to 6.5μm-10μm in the case of 0.31% V(C,N) master alloy. And the 0.31% V(C,N) addition has better refining effect than 0.15, 0.24% and 0.50%V(C,N) addition. The microstructure of research steels was lower bainite and martensite for all specimens.

• Periodical: Materials Science Forum (Volume 815)
• Pages: 292-296
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.815.292
• Online since: March 2015
• Authors: Quan Lyu, Hao Yu Wen, Zheng Hua Tang*, Qi Hu, Bo Cheng
• Keywords: Bainite Steel, Grain Refinement, V(C,N) Powder

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