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

The Korean Society of Manufacturing Technology Engineers (한국생산제조학회)
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Characteristics of Surface Hardening of Nd:YAG Laser According to Temperature Changes of SM45C

SM45C강의 온도변화에 따른 Nd:YAG 레이저 표면경화 특성

  • 이가람 (조선대학교 첨단부품소재공학과) ;
  • 양윤석 (조선대학교 첨단부품소재공학과) ;
  • 황찬연 (조선대학교 첨단부품소재공학과) ;
  • 유영태 (조선대학교 메카트로닉스공학과)
  • Received : 2012.03.07
  • Accepted : 2012.08.30
  • Published : 2012.12.15
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Abstract

Laser surface hardening is one of core technologies to enhance various characteristics such as the strength, hardness, toughness, abrasion resistance, and fatigue resistance for the mold material. This paper focuses on testing characteristics of the laser heat treatment according to the preheating parameters in case of the SM45C medium carbon steel. In this paper, we assume that the power and travel speed of the laser are 1,800W and 0.5m/min, respectively, and the range of the preheating temperature is $50^{\circ}C{\sim}300^{\circ}C$. From the result of the test, we observed that the hardness width and depth are enhanced as the temperature is increased. Also, the best average hardness was 751.7Hv for the temperature of $100^{\circ}C$.

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References

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