Observation and Analysis of the Microstructures of IGF Refined Low Carbon Microalloyed Non-Tempered Steel

Abstract:

The IGF refined microalloyed non-tempered steel with high strength and toughness is developed, by adding trace elements such as vanadium and titanium and using aluminum as the deoxidizing elements. The combination of these elements and elements C and N in the steel leads to the precipitation of a great deal of fine and scattered alloy carbides and nitrides. These fine particles provide ideal precipitation positions for IGF’s nucleation. The results show that a lot of IGF appears in the developed steel after hot-forging and air cooling, which effectively divides up the austenite grains and refines the steel structures. The strength and toughness of the steel is increased. The tensile strength reaches 1150Mpa and the impact toughness is between 61.35-65.37J/cm².

• Periodical: Advanced Materials Research (Volumes 602-604)
• Pages: 323-328
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.602-604.323
• Online since: December 2012
• Authors: Shu Hua Wang, Hai Ou Jing, Le Jin, Yan Xue
• Keywords: Intragranular Ferrite (IGF), Low Carbon Microalloyed Non-Tempered Steel

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