Journal of Ocean Engineering and Technology (한국해양공학회지)

Korean Society of Ocean Engineers (한국해양공학회)
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UNSM Surface Technology for Manufacturing and Remanufacturing Torsion Bars for Crawler Vehicles

초음파 나노표면개질을 적용한 궤도차량용 토션바 제조 및 재제조용 표면 개질기술에 관한 연구

  • 서창민 (경북대학교 기계공학부) ;
  • 편영식 (선문대학교 기계공학부) ;
  • 조인호 ((주)디자인메카 DM기술연구소) ;
  • 백운봉 (한국표준과학연구원 에너지인프라연구단)
  • Received : 2011.08.11
  • Accepted : 2011.12.23
  • Published : 2011.12.31
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Abstract

The Ultrasonic Nanocrystal Surface Modification (UNSM) technology improves the fatigue life of a torsion bar by inducing compressive residual stress on the surface layer. The UNSM is applied to replace the presetting method and shot peening technology. The torsion bar must be changed periodically because of a lack of durability and a phenomenon related to the stress relaxation. The torsion fatigue test specimens were made of DIN17221 material, and the results showed that the fatigue life was 5 times more than under durability test conditions. A comparison test between the commercial vehicles' presetting method and shot peened torsion bar and the UNSM torsion bar showed that the UNSM could replace the presetting method and shot peening.

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References

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