Selective Surface Modification of Complexly Shaped Steel Parts by Robot-Assisted 3D Scanning Laser Hardening System

Lesyk, Dmytro; Hruška, Matej; Dzhemelinkyi, Vitaliy; Dаnylеikо, Oleksandr; Honner, Milan

doi:10.1007/978-3-031-05230-9_3

Cited by 4 publications

(1 citation statement)

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“…To comprehensively improve the quality of the surface layer of steel parts, one of the effective solutions is to use laser surface transformation hardening in combination with surface plastic deformation (SPD) using ultrasonic tools [10]. Compared to traditional thermal methods of surface hardening, the advantages of selective laser transformation hardening technology are high processing speed, the ability to process hard-to-reach surfaces of complex geometry [11], and the possibility to combine them with SPD methods. In particular, hybrid laser thermal and strain alloying guarantees the formation of residual compressive stresses (-1000 MPa) and an increase in hardness by more than 30 % in the near-surface layer compared to post-processed SPD material [12].…”

Section: Literature Review and Problem Statementmentioning

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: Literature Review and Problem Statementmentioning

confidence: 99%