Effects of surface alloying on microstructure and wear behavior of ductile iron

Shamanian, M.; Abarghouie, S.M.R. Mousavi; Pour, Shadi Rasoul

doi:10.1016/j.matdes.2010.01.017

Cited by 61 publications

(23 citation statements)

References 24 publications

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“…Ductile iron (DI) is widely used in a broad range of industrial applications such as machine tool beds, dies, punches, cylinders, etc., owing to its low production cost combined with favorable properties like machinability, excellent castability and comprehensive strength-toughness [1][2][3]. However, in harsh service circumstances like those in mining and rolling sectors, the low hardness and poor wear resistance limit its further industrial applications.…”

Section: Introductionmentioning

confidence: 99%

Hard-yet-tough high-vanadium high-speed steel composite coating in-situ alloyed on ductile iron by atmospheric plasma arc

2017

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Hard-yet-tough high-vanadium high-speed steel composite coating in-situ alloyed on ductile iron by atmospheric plasma arc Cao, Huatang; Dong, Xuanpu; Pei, Yutao T. Take-down policy If you believe that this document breaches copyright please contact us providing details, and we will remove access to the work immediately and investigate your claim. H. Cao, et al., Int. J. Comp. Meth. and Exp. Meas., Vol. 6, No. 3 (2018) ABSTRACT A graded high-vanadium alloy composite coating was synthesized from premixed powders (V, Cr, Ti, Mo, Nb) on ductile iron (DI) substrate via atmospheric plasma arc surface alloying process. The resulted cross-section microstructure is divided into three distinct zones: upper alloyed zone (AZ) rich with spherical primary carbides, middle melted zone (MZ) with fine white iron structure and lower heat affected zone (HAZ). Spherical or bulk-like primary carbides with diameter < 1 μm in the AZ are formed via in-situ reactions between alloy powders and graphite in DI. Microstructural characterizations indicate that the carbides are primarily MC-type (M=V, Ti, Nb) carbides combined with mixed hardphases such as M 2 C, M 7 C 3 , M 23 C 6 , and martensite. Disperse distribution of spherical, submicron-sized metal carbides in an austenite/ledeburite matrix render the graded coating hard-yet-tough. The maximum microhardness of the upper alloyed zone is 950 HV 0.2 , which is five times that of the substrate. Significant plastic deformation with no cracking in the micro-indentations points to a high toughness. The graded high-vanadium alloy composite coating exhibits superior tribological performance in comparison to Mn13 steel and plasma transferred arc remelted DI.

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Section: Introductionmentioning

confidence: 99%

Hard-yet-tough high-vanadium high-speed steel composite coating in-situ alloyed on ductile iron by atmospheric plasma arc

2017

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“…Hardfacing can be applied by several techniques, such a plasma spraying, laser cladding, arc welding and thermal spraying methods [2,4,5].…”

Section: Introductionmentioning

confidence: 99%

A Study on Hardfacing Alloy Using Fe-Cr and Fe-B Powders

2015

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The aim of this study is the investigation of the effect of ferroboron and ferrochromium with massive wire based hardfacing alloys. Mixture of Fe-Cr and Fe-B powders was added to massive wire during welding process. Hardface layers were obtained by three different powder mixture and three different powder/massive wire proportions. Hardfacing was applied to two AISI 1020 steel substrates by open arc welding. Hardness test, scanning electron microscope and X-ray diffraction analysis were made to the samples. Test results showed that increasing ferroboron content and increasing powder mixture amount enhanced the microhardness of the specimens.

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“…Different methods such as surface melting, surface hardening and surface alloying have been used to improve the sliding wear resistance of ADI. [12][13][14][15] These methods modify the ADI microstructure by forming a hard layer on the surface. A modified case hardening technique called boro-tempering, which combines boronizing with austempering, has also been used.…”

Section: Introductionmentioning

confidence: 99%

Sliding Wear Behavior of PVD CrN and TiN Coated Austempered Ductile Iron

et al. 2014

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This work studies the sliding wear behavior of PVD coated austempered ductile iron samples. The effects of the substrate surface finishing method (grinding and polishing) and coating material (CrN and TiN) on the wear behavior are evaluated. Coatings were applied in an industrial reactor. Deposition times were adjusted to obtain similar film thicknesses in both coating materials. Wear tests under dry sliding conditions were carried out with a pin-on-disc tribometer (ASTM G99). The steady-state friction coefficient and wear rate were calculated for each sample variant. The wear track of the discs was examined by using optical microscopy and stylus profilometry.The results obtained indicate that the uncoated and TiN coated samples show steady-state friction coefficients close to 0.8, while the CrN coated samples show steady-state values close to 0.4. The sliding wear tests do not produce the fracture and/or delamination of the films in any case. The specific wear rate of the CrN and TiN coated samples is close to zero, while that of the uncoated samples is higher. The wear rate of the uncoated samples is slightly higher for the ground ones. The specific wear rate of the pins (AISI 52100 bearing balls) is higher than that of the discs in all the cases. The wear rate of the pins tested against uncoated samples is higher for the ground ones. The wear rate of the pins tested against coated samples is higher for the polished and TiN coated ones.

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Effects of surface alloying on microstructure and wear behavior of ductile iron

Cited by 61 publications

References 24 publications

Hard-yet-tough high-vanadium high-speed steel composite coating in-situ alloyed on ductile iron by atmospheric plasma arc

Hard-yet-tough high-vanadium high-speed steel composite coating in-situ alloyed on ductile iron by atmospheric plasma arc

A Study on Hardfacing Alloy Using Fe-Cr and Fe-B Powders

Sliding Wear Behavior of PVD CrN and TiN Coated Austempered Ductile Iron

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