Journal of the Korean Society for Precision Engineering (한국정밀공학회지)

Korean Society for Precision Engineering (한국정밀공학회)
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Characteristics Induction and Laser Surface hardening of SM45C Steel

SM45C강의 레이저표면경화와 고주파표면경화특성

  • 나기대 (조선대학교 기계설계공학과) ;
  • 신호준 (조선대학교 정밀기계공학과 대학원) ;
  • 신병헌 (조선대학교 정밀기계공학과 대학원) ;
  • 유영태 (조선대학교 메카트로닉스 공학과)
  • Published : 2006.07.01
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Abstract

Laser heat treatment technologies have been used to improve characteristics of wear and to enhance the fatigue resistance for automotive parts. The bjective of this research work is to investigate the influence of the process parameters, such as power of laser and defocused spot position, on the characteristics of laser heat treatment for the case of SM45C medium carbon steel. CW Nd:YAG laser is selected as the heat source. The optical lens with the elliptical profile is designed to obtain a wide heat treatment area with a uniform hardness. From the results of the experiments, it has been shown that the maximum hardness is approximatly 780 Hv when the power and the travel of laser are 1,095 W and 0.6 m/min, respectively. In addition, the hardening width using the elliptical lens was three time larger than that using the defocusing of laser beam.

Keywords

References

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