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EFFECTS OF QUENCHING AND NORMALIZING ON THE TENSILE TEST PARAMETERS OF MECHANICAL PROPERTIES OF NIGERIAN STEEL NST 60MN

lnegbenebor, A. O. EFFECTS OF QUENCHING AND NORMALIZING ON THE TENSILE TEST PARAMETERS OF MECHANICAL PROPERTIES OF NIGERIAN STEEL NST 60MN. NSE TECHNICAL TRANSACTION, 34 (4). pp. 76-87.

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Abstract

The steel NST 60Mn Is popular among the Indigenous steel produced and used in the construction indusuy in as roted condition. However. It Is necessary to know the elfect of quenching and normalising on the tensile test parameters of mechanical propetJes !nch;C!r!g the WO(~<·hardening behaviour of this stH!. Such iolawledge would au is! in using this steel in ot'ler rr.anufacturing sectors. From thr.? study, !he results showli!IJ! the normalized samples have higher dut:m'r.1 than th!' quenched ones. This h~s been aHriou!~ to the transformation to ferrlle and little of pecrlite phases during normalisation. How~er. the transformation into the martensitic and preci::;i~t.:on htrde!'!ing of carbide {IS, c) ere responsili.e fer the.irr.provement of the yie!d and tensi!e strengtl1 of the steff. This transfo;mation invariably at:ecteo tt"e ductiie ~rcper!ies of the steel when it was que!'lched in \'late:. The work':"hardening behaviour js explained in t~rms Qf disio~ationdislocat! on ii"l~!'l. The te::i\.l"jologJ;al impol't:iarn;e oft'·u~ res.L~ts obtaine:::! are O!s:-.:ssed.

Item Type: Article
Subjects: T Technology > T Technology (General)
T Technology > TJ Mechanical engineering and machinery
Divisions: Faculty of Engineering, Science and Mathematics > School of Engineering Sciences
Depositing User: Mrs Hannah Akinwumi
Date Deposited: 14 Apr 2015 13:59
Last Modified: 14 Apr 2015 13:59
URI: http://eprints.covenantuniversity.edu.ng/id/eprint/4985

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