Formation of White Etching Layers by Deep Rolling of AISI 4140 Steel

Souza, Poliana Santos; Cangussu, Vinícius Melo; Câmara, Marcelo Araújo; Abrão, Alexandre Mendes; Denkena, Berend; Breidenstein, Bernd; Meyer, Kolja

doi:10.1007/s11665-020-04988-3

Cited by 2 publications

(1 citation statement)

References 27 publications

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“…In addition, it should also be noted that the surface layer with equiaxed nano-sized grains formed by the combined treatment increases the corrosion resistance of AISI 1045 steel (Table 2). It is known that the application of severe plastic deformation of iron-carbon alloys leads to the formation of a white layer on the surface, which protects the surface in corrosive media [21,26]. The work [27] shows that UIT is an effective method of increasing resistance to stress corrosion cracking.…”

Section: Discussion Of the Results Of Studying The Quality And Operat...mentioning

confidence: 99%

Surface quality improvement of steel parts by combined laser-ultrasonic treatment: determination algorithm of technological parameters

Lesyk

Dzhemelinskyi

Mordyuk

et al. 2023

EEJET

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To provide the quality of the surface layer and improve operational properties, a combined laser-ultrasonic surface hardening and finishing technology of steel products is proposed. This work is devoted to determining the range of rational parameters of laser heat treatment and ultrasonic impact treatment for enhancing the complex hardening process of AISI 1045 steel and AISI D2 steel. Laser surface transformation hardening was carried out with a constant temperature strategy using a fiber laser and scanning optics at a heating temperature of 1200–1,300 °C and a processing speed of 40–140 mm/min. Ultrasonic surface hardening and finishing were performed on technological equipment with an amplitude of ultrasonic vibration of 18 μm and a load of the ultrasonic tool of 50 N. The ultrasonic treatment duration varied from 60 to 180 s. The results showed that laser-ultrasonic treatment leads to an increase in the hardening intensity by more than 200 %, forming a hardening depth of 200–440 μm. Combined treatment leads to a significant increase in wear resistance due to the formation of ultrafine-grained martensitic microstructure with hardness (58–60 HRC5) in the near-surface layer. The combined laser-ultrasonic hardening process control algorithm for surface treatment of structural and tool steels is proposed, limiting the heating temperature, the duration of laser (ultrasonic) exposure, and the vibration amplitudes of the ultrasonic horn. Laser-ultrasonic treatment will allow the formation of a surface layer with a given set of properties, providing increased wear and corrosion resistance. The developed technology can be used for surface hardening and finishing of large-sized steel products in the mechanical engineering industry.

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Section: Discussion Of the Results Of Studying The Quality And Operat...mentioning

confidence: 99%

Surface quality improvement of steel parts by combined laser-ultrasonic treatment: determination algorithm of technological parameters

Lesyk

Dzhemelinskyi

Mordyuk

et al. 2023

EEJET

View full text Add to dashboard Cite

show abstract

A process-reliable tailoring of subsurface properties during cryogenic turning using dynamic process control

Denkena,

Breidenstein,

Maier

et al. 2023

Prod. Eng. Res. Devel.

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Considering the current demands for resource conservation and energy efficiency, innovative machining concepts and increased process reliability have a significant role to play. A combination of martensitic hardening of the subsurface and near-net-shape manufacturing represent a great potential to produce components with wear-resistant subsurfaces in an energy- and time-saving way. Within the scope of the present study, the influence of cryogenic machining of metastable austenitic steel on the martensitic transformation and surface quality was investigated. Different cooling strategies were used. A soft sensor based on eddy current in-process measurements was used to determine and subsequently affect the martensitic transformation of the subsurface. The feed rate and component temperature were identified as significant factors influencing the martensitic transformation. However, a high feed rate leads to an increase in surface roughness, and thus to a reduction in component quality. For this reason, a roughing process for achieving maximum martensitic transformation was carried out first in the present study and then a reduction in the surface roughness by maintaining the martensitic subsurface content was aimed for by a subsequent finishing process. With the knowledge generated, a dynamic process control was finally set up for designing the turning process of a required subsurface condition and surface quality.

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Formation of White Etching Layers by Deep Rolling of AISI 4140 Steel

Cited by 2 publications

References 27 publications

Surface quality improvement of steel parts by combined laser-ultrasonic treatment: determination algorithm of technological parameters

Surface quality improvement of steel parts by combined laser-ultrasonic treatment: determination algorithm of technological parameters

A process-reliable tailoring of subsurface properties during cryogenic turning using dynamic process control

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