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Combined Laser-Ultrasonic Surface Hardening Process for Improving the Properties of Metallic Products

  • Dmytro LesykEmail author
  • Silvia Martinez
  • Bohdan Mordyuk
  • Vitaliy Dzhemelinskyi
  • Oleksandr Danyleiko
Conference paper
Part of the Lecture Notes in Mechanical Engineering book series (LNME)

Abstract

Combined laser-ultrasonic hardening and finishing process of large-sized products using laser heat treatment (LHT) followed by the ultrasonic impact treatment (UIT) is proposed. In this study, a medium carbon and chromium tool steels were heat treated by a 1 kW fiber laser with scanning optics and heating temperature control system to improve their surface hardness. A number of experiments are carried out by changing the heating temperature and specimen feed rate while keeping a constant scanning speed and width to produce the hardened layers of different depths. After the LHT, the specimen surfaces were severely deformed by an ultrasonic tool equipped with a seven-pin impact head supplied by a 0.3 kW ultrasonic generator and controlled by a computer-driven machine to form a regular surface microrelief and compressive residual stresses. The results indicate that the combined treatments provide more than triple increase in the surface hardness and formation the compressive residual stresses. Additionally, the LHT + UIT leads to a formation of the regular surface microrelief with minimum surface roughness and high oil holding capacity.

Keywords

Laser-ultrasonic hardening Scanning optics Multi-pin impact head Temperature control Regular microrelief Hardness 

Notes

Acknowledgements

This work was financially supported by the East-West European Network on higher Technical education (EWENT) program Erasmus Mundus Action 2 Lot 8. Partial supports by NAS of Ukraine “Resource 2” (Project 9.8.1) are also acknowledged.

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Copyright information

© Springer International Publishing AG, part of Springer Nature 2019

Authors and Affiliations

  1. 1.Department of Laser Systems and Physical TechnologiesNational Technical University of Ukraine “Igor Sikorsky Kyiv Polytechnic Institute”KyivUkraine
  2. 2.Department of Mechanical EngineeringUniversity of the Basque CountryBilbaoSpain
  3. 3.Department of Physical Principles for Surface EngineeringG.V. Kurdyumov Institute for Metal Physics of the NAS of UkraineKyivUkraine

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