Electron beam surface melting of as cast and austempered ductile irons

Sohi, M. Heydarzadeh; Karshenas, G.; Boutorabi, S. M. A.

doi:10.1016/j.jmatprotec.2004.04.307

Cited by 32 publications

(1 citation statement)

References 9 publications

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“…The higher hardness at the surface layer imparts excellent wear resistance, while the soft inner core provides higher toughness and fracture resistance. Hardness, strength and wear resistance can be improved using different surface treatments, such as induction, flame hardening, electron beam and more recent technologies such as laser and electrolytic plasma hardening [1][2][3][4][5][6]. However, electrolytic plasma hardening stands out for several good reasons.…”

Section: Introductionmentioning

confidence: 99%

Wear performance of ductile iron after electrolytic plasma hardening

Ayday¹,

Durman²

2020

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This study aimed to improve the tribological behavior of electrolytic plasma treated (EPT) ductile iron (DI). For this purpose, ductile iron was electrolytic plasma hardened under different processing parameters (treatment time and thermal cycle). Three different types of specimens were tested: untreated DI, electrolytic plasma hardened DI and remelted DI by two type wear test. It was found that remelted DI performed much better concerning wear resistance than the other samples. The microstructure of the hardened specimens was investigated using optical microscopy. Microhardness profiles and surface hardness were investigated via the Rockwell test. The microstructure and hardness of the EPT hardened layer were dependent on the processing parameters, with the hardness values reaching the range 880-1080 ± 10 HV0.2. K e y w o r d s : electrolytic plasma hardening, ductile iron, hardness, remelting, wear

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Section: Introductionmentioning

confidence: 99%

Wear performance of ductile iron after electrolytic plasma hardening

Ayday¹,

Durman²

2020

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Interfacial Behavior and Properties of Aluminum–Bronze Coatings on Ductile Iron by Wire‐Arc Deposition

Wei

Lei

et al. 2022

Adv Eng Mater

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Aluminum–bronze coatings are successfully prepared on ductile iron by cold metal transfer (CMT) wire‐arc deposition. Interface characteristics and properties of aluminum–bronze coatings on ductile iron are investigated. The results demonstrate that heat input not only has a significant effect on the dilution rate, but also can affect the microstructure evolution and interface behavior. At low heat input, the dilution rate is close to zero, and incompletely dissolved graphite nodules and a few short cracks are distributed on the fusion line. The γ2 + α‐Cu eutectic phase is produced along the columnar grain boundaries of the deposited layer, and no Fe‐enriched phase is found. As heat input increases, the interface between aluminum bronze and cast iron changes from a diffusion joint to a metallurgical bond and from a single interface to a double interface. Fe‐enriched phases and Cu‐enriched phases are produced in the deposited layer and fusion zone, respectively. The microstructure of the fusion zone is mainly austenite, martensite, and ledeburite, resulting in the highest hardness near the interface. The interfacial bond strength of high heat input deposited layer is significantly higher than that of low heat input, and the latter has higher wear resistance than the former.

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