Journal of the Korean Society for Precision Engineering (한국정밀공학회지)

Korean Society for Precision Engineering (한국정밀공학회)
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Characteristics of Surface Hardening of Nd:YAG Laser According to the Diameter variation of SM45C Cylindrical Bar

SM45C 환봉의 직경변화에 따른 Nd:YAG 레이저 표면경화 특성

  • Lee, Ka Ram (Department of Advanced parts and Materials Engineering, Chosun Univ.) ;
  • Yang, Yun Seok (Department of Advanced parts and Materials Engineering, Chosun Univ.) ;
  • Hwang, Chan Youn (Department of Advanced parts and Materials Engineering, Chosun Univ.) ;
  • Park, Eun Kyeong (Department of Advanced parts and Materials Engineering, Chosun Univ.) ;
  • Yoo, Young Tae (Department of Mechatronics Engineering, Chosun Univ.)
  • 이가람 (조선대학교 첨단부품소재공학과) ;
  • 양윤석 (조선대학교 첨단부품소재공학과) ;
  • 황찬연 (조선대학교 첨단부품소재공학과) ;
  • 박은경 (조선대학교 첨단부품소재공학과) ;
  • 유영태 (조선대학교 메카트로닉스공학과)
  • Received : 2012.11.09
  • Accepted : 2013.01.11
  • Published : 2013.05.01
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Abstract

Heat-treatment is one of the core technologies to enhance various characteristics such as strength, hardness, toughness, abrasion resistance and fatigue resistance for the mold material. This paper focuses on characteristics of the laser heat-treatment according to the cylindrical bar diameter variation in case of the SM45C. From the results of the experiments, it has been observed that the maximum hardness is 744Hv when the power is 1630W and the travel of laser is 0.5m/min. And then, the hardness width, depth and microstructure were observed for characteristics. Finally, when the cylindrical bar diameter size grow, the hardness width decrease whereas hardness depth increase.

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References

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