Economically attractive high strength steel bars using single microaddition of titanium or vanadium
In this study,single microaddition of either titanium or vanadium was investigated to study its effect on the mechanical properties and microstructure of hot deformed steels.Comparing with non-microalloyed steels,increments of up to 428 and 392 MPa in the yield and ultimate tensile strengths can be attained by using either V-or Ti-microalloying technique.Microaddition of low carbon steel (0.23%C) with 0.2% Ti is effective to obtain steel with yield and ultimate tensile strengths of 637 and 733 MPa,respectively.Whereas microaddition of 0.2% V into steel with higher C-content (0.32%C) results in higher yield and ultimate tensile strengths of 799 and 957 MPa,respectively.These high strength levels are accompanied with good elongation of 18 – 22%.The strengthening effect of V-or Ti-microadditions is due to grain refinement and precipitation strengthening.V-microalloyed steel exhibits higher precipitation strengthening,whereas Ti- microalloyed steel exerts greater grain refinement effect.Vanadium- or titanium-microalloyed steel can be substituted for commonly used carbon steel in the production of high strength reinforcing steel bars.It is evident that the substitution is economically attractive for both the producer and user.However,producing Ti-microalloyed steel bars seems to be more profit than V-microalloyed steel bars for the steelmaker.
Microalloyed steels vanadium microaddition titanium microaddition strength ductility grain refinement precipitation strengthening
Mamdouh Eissa Madeha Hegazy Gamal El-Mahdy Fouad Sayed
Steel and Ferroalloys Department,Central Metallurgical Research and Development Institute CMRDI Department of chemistry,Faculty of Science,Helwan University,Helwan,Egypt
国际会议
Asia Steel International conference 2012(第五届亚洲钢铁大会)
北京
英文
1-12
2012-09-23（万方平台首次上网日期，不代表论文的发表时间）