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The Effect of Niobium on the Formation of Nanostructured Low Carbon Steel Using Martensite Treatment
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نویسنده
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Abbasi .M ,Kermanpur .A ,Najafizadeh .A ,Saeedipour .S ,Mazaheri .Y
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منبع
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international journal of iron and steel society of iran - 2012 - دوره : 9 - شماره : 1 - صفحه:6 -10
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چکیده
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The formation of nano/ultrafine grained ferrite in low carbon steels containing different amounts of niobiumwas investigated using thermomechanical treatment which consisted of annealing of 85% cold rolled martensitewith different parameters. the specimens were characterized by optical and scanning electron microscopy andvickers hardness test. a lamellar dislocation cell structure was formed during cold rolling. an increase in hardnesswas found during annealing with the addition of the nb element. the mean grain size of the specimens annealed at550 ?c for 300 s was approximately similar (ranging from 79 to 87 nm) for both chemical compositions. increasingannealing temperature to 600 ?c or annealing time to 2.7 ks led to a severe grain growth in the steel without nb,but no considerable changes in nb containing steel were observed.
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کلیدواژه
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Ultrafine/Nano grained structure ,Niobium ,Cold rolled martensite ,Grain growth
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آدرس
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isfahan university of technology, Department of Materials Engineering, Isfahan University of Technology, Isfahan 84156-83111, Iran, ایران, isfahan university of technology, Department of Materials Engineering, Isfahan University of Technology, Isfahan 84156-83111, Iran, ایران, isfahan university of technology, Department of Materials Engineering, Isfahan University of Technology, Isfahan 84156-83111, Iran, ایران, isfahan university of technology, Department of Materials Engineering, Isfahan University of Technology, Isfahan 84156-83111, Iran, ایران, isfahan university of technology, Department of Materials Engineering, Isfahan University of Technology, Isfahan 84156-83111, Iran, ایران
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Authors
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