Journal of Advanced Marine Engineering and Technology

The Korean Society of Marine Engineering (한국마린엔지니어링학회)
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A Study on the Diode Laser Surface Hardening Treatment of Cast Iron for Die Material(I) - Characteristics of Surface Hardening by Die Materials -

금형재료용 주철의 다이오드 레이저 표면경화처리에 관한 연구(I) - 금형재료에 따른 표면경화 특성 -

  • 김종도 (한국해양대학교 기관공학부) ;
  • 송무근 (한국해양대학교 대학원) ;
  • 황현태 ((재)울산테크노파크(자동차기술지원단))
  • Received : 2011.07.04
  • Accepted : 2011.11.08
  • Published : 2011.11.30
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Abstract

In this study, two types of die material cast iron was treated for surface hardening by using high power diode laser to improve mechanical properties of die which is using as essential production technology in the parts manufacturing in virtually all the infrastructure industries now. First of all, the heat treatment characteristics of FCD550 material which is spheroidal graphite cast iron, and through the heat treatment of HCI350 material which is flake graphite cast iron, the heat treatment characteristics of the two materials were compared. The hardness of hardened zone increased over 3 times over base material for both specimens, but as for required heat input, HCI350 was higher than FCD550 material depending on the heat conductivity of the materials by the content amount and shape of graphite contained in the material.

본 연구에서는 거의 모든 기반산업에서 필수적인 생산기술로 사용되고 있는 금형의 기계적 성질을 향상시키기 위해 고출력 다이오드 레이저를 이용하여 두 종류의 금형재료용 주철을 표면경화처리하였다. 우선, 구상흑연 주철인 FCD550 소재에 대하여 열처리 특성을 파악한 후, 편상흑연 주철인 HCI350 소재를 열처리하여 두 소재의 표면경화 특성을 비교하였다. 경화부의 경도는 두 시험편 모두 모재에 비해 3배 이상의 경도 상승을 보였지만, 재료에 포함된 흑연의 함유량 및 형상의 차이에 의한 재료의 열전도도에 따라서 FCD550 소재에 비해 HCI350이 열처리하는데 있어서 더 많은 입열이 요구되었다.

Keywords

References

  1. P. Gopalakrishnan. and P. Shankar "Laser Surface Modification of Low Carbon Borided Steels", Scripta-mater., vol. 44, 2001.
  2. Kim, T. H., "Surface Modification and Processing of Metals by Laser Beam", Bull of the Korea Inst. of Met & Mater, vol. 5-4, pp. 361-373, 1992.
  3. B. Ehlers, H. Herfurth and S. Heinemann "Surface Hardening with High Power Diode Laser", ICALEO-Section G, pp. 75-84, 1998.
  4. J.D Kim and W.J Kang, "Study on Characteristics of Laser Surface Transformation Hardening for Rod-shaped Carbon Steel(II)", Journal of the Korean Welding and Joining Society vol. 25, pp. 85-91, 2007. https://doi.org/10.5781/KWJS.2007.25.3.085
  5. I.R. Pashby, S. Barnes and B.G. Bryden "Surface Hardening of Steel Using a High Power Diode Laser", Journal of Materials Processing Technology vol. 139, pp. 585-588, 2003. https://doi.org/10.1016/S0924-0136(03)00509-0
  6. Lin Li "The Advances and Characteristics of Hihg Power Diode Laser Materials Processing", Optics and Laser in Engineering vol. 34, pp. 231-253, 2000. https://doi.org/10.1016/S0143-8166(00)00066-X
  7. E. Kennedy, G. Byrne and D.N. Collins "A review of the use of high power diode lasers in surface hardening", Journal of Materials Processing Technology 155-156, pp. 1855-1860, 2004. https://doi.org/10.1016/j.jmatprotec.2004.04.276
  8. M. Gagne, The Sorelmetal Book of Ductile Iron, Rio Tinto Iron & Titanium Inc., 2004.
  9. W. F. Smith, Structure and Properties of Engineering Alloys, McGraw-Hill Inc., pp. 353, 1993.
  10. D. Holmgren, A. Dioszegi, I.L. Svensson "Effects of Nodularity on Thermal Conductivity of Cast Iron", International Journal of Cast metals Research, vol. 20, no. 1, 2007.

Cited by

  1. A Study on the Diode Laser Surface Hardening Treatment of Cast Iron for Die Material(II) -Comparison of Hardening Characteristics by the Parts Applied Heat Treatment- vol.35, pp.8, 2011, https://doi.org/10.5916/jkosme.2011.35.8.1048
  2. A Study on the Diode Laser Surface Hardening Treatment of Cast Iron for Die Material(III) - Characteristics of Microstructures in Hardened Zone - vol.36, pp.1, 2012, https://doi.org/10.5916/jkosme.2012.36.1.78