Investigation of improving wear performance of hypereutectic 15%Cr-2%Mo white irons

This study aimed at optimizing impact toughness and abrasion wear resistance of 15%Cr-2%Mo hypereutectic abrasion-resistant white irons. The effects of dynamic solidification, niobium addition, combined action of them and heat treatment have been investigated. Investigations were performed by means...

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Main Authors: R. Reda, A. Nofal, Kh. Ibrahim
Format: Article
Language:English
Published: Foundry Journal Agency 2010-11-01
Series:China Foundry
Subjects:
Nb
Online Access:http://www.foundryworld.com/uploadfile/201012953225653.pdf
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spelling doaj-882016ea7f9947a38d8922cfacd1b61b2020-11-25T01:48:06ZengFoundry Journal AgencyChina Foundry1672-64212010-11-0174438446Investigation of improving wear performance of hypereutectic 15%Cr-2%Mo white irons R. RedaA. NofalKh. IbrahimThis study aimed at optimizing impact toughness and abrasion wear resistance of 15%Cr-2%Mo hypereutectic abrasion-resistant white irons. The effects of dynamic solidification, niobium addition, combined action of them and heat treatment have been investigated. Investigations were performed by means of the image analyzer, scanning electron microscopy (SEM), energy-dispersive spectrometry (EDS) and X-ray diffraction. Impact toughness and abrasion wear resistance tests were conducted. Fracture and worn surfaces were studied. Results indicated that microstructural control during solidification is the most valuable tool to attain the optimum combination between impact toughness and wear resistance in hypereutectic iron. Combined action of Nb addition and dynamic solidification improves impact toughness and wear resistance even more than the action of each individual factor. In the as-cast condition, impact toughness and abrasion resistance were increased after dynamic solidification compared to statically solidified one by 71.4% and 10%, respectively. This enhancement was increased to 114.3 % and 28.8 % by adding 2% Nb. Lower tempering temperature of 260°C exhibits better impact and abrasion resistance than the sub-critical tempering temperature of 500°C.http://www.foundryworld.com/uploadfile/201012953225653.pdfhypereutectic Cr-Mo white irondynamic solidificationNbcombined actionheat treatmentimpact toughnessfractographywear resistanceworn surface
collection DOAJ
language English
format Article
sources DOAJ
author R. Reda
A. Nofal
Kh. Ibrahim
spellingShingle R. Reda
A. Nofal
Kh. Ibrahim
Investigation of improving wear performance of hypereutectic 15%Cr-2%Mo white irons
China Foundry
hypereutectic Cr-Mo white iron
dynamic solidification
Nb
combined action
heat treatment
impact toughness
fractography
wear resistance
worn surface
author_facet R. Reda
A. Nofal
Kh. Ibrahim
author_sort R. Reda
title Investigation of improving wear performance of hypereutectic 15%Cr-2%Mo white irons
title_short Investigation of improving wear performance of hypereutectic 15%Cr-2%Mo white irons
title_full Investigation of improving wear performance of hypereutectic 15%Cr-2%Mo white irons
title_fullStr Investigation of improving wear performance of hypereutectic 15%Cr-2%Mo white irons
title_full_unstemmed Investigation of improving wear performance of hypereutectic 15%Cr-2%Mo white irons
title_sort investigation of improving wear performance of hypereutectic 15%cr-2%mo white irons
publisher Foundry Journal Agency
series China Foundry
issn 1672-6421
publishDate 2010-11-01
description This study aimed at optimizing impact toughness and abrasion wear resistance of 15%Cr-2%Mo hypereutectic abrasion-resistant white irons. The effects of dynamic solidification, niobium addition, combined action of them and heat treatment have been investigated. Investigations were performed by means of the image analyzer, scanning electron microscopy (SEM), energy-dispersive spectrometry (EDS) and X-ray diffraction. Impact toughness and abrasion wear resistance tests were conducted. Fracture and worn surfaces were studied. Results indicated that microstructural control during solidification is the most valuable tool to attain the optimum combination between impact toughness and wear resistance in hypereutectic iron. Combined action of Nb addition and dynamic solidification improves impact toughness and wear resistance even more than the action of each individual factor. In the as-cast condition, impact toughness and abrasion resistance were increased after dynamic solidification compared to statically solidified one by 71.4% and 10%, respectively. This enhancement was increased to 114.3 % and 28.8 % by adding 2% Nb. Lower tempering temperature of 260°C exhibits better impact and abrasion resistance than the sub-critical tempering temperature of 500°C.
topic hypereutectic Cr-Mo white iron
dynamic solidification
Nb
combined action
heat treatment
impact toughness
fractography
wear resistance
worn surface
url http://www.foundryworld.com/uploadfile/201012953225653.pdf
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