Journal of the Korean Society of Manufacturing Technology Engineers (한국생산제조학회지)

The Korean Society of Manufacturing Technology Engineers (한국생산제조학회)
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Development of a Ultrasonic System for Nano-Surface Reformation Process

  • Kim, Hyunse (Energy Systems Research Division, Korea Institute of Machinery and Materials) ;
  • Lim, Euisu (Energy Systems Research Division, Korea Institute of Machinery and Materials) ;
  • Park, Jong-Kweon (Energy Systems Research Division, Korea Institute of Machinery and Materials)
  • Received : 2017.05.08
  • Accepted : 2017.06.23
  • Published : 2017.08.15
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Abstract

In this article, a 20 kHz Titanium (Ti) ultrasonic waveguide system for a nano-surface reformation process was designed and fabricated. First, finite element analysis using ANSYS software was performed to find the optimal dimensions. The obtained anti-resonance frequency for the Ti transducer with the piezoelectric device was 20.0 kHz, which value agreed well with the experiment result of 20.1 kHz (0.5% error). To test the system, chromium molybdenum steel (SCM) 435 was chosen as a test-piece. The result proved that the reformed depth was $36{\mu}m$. In addition, hardness was measured before and after the process. The value was changed from 14 HRC to 21 HRC, which is 50% increasing rate. Finally, the friction coefficient test result showed that the surface coefficient was reduced from 0.14 to 0.10 (28.6% reduction). Based on the results, the Ti ultrasonic equipment is regarded as a useful device for nano-scale surface reformation.

Keywords

References

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