Transactions of the Korean Society of Machine Tool Engineers (한국공작기계학회논문집)

The Korean Society of Manufacturing Technology Engineers (한국생산제조학회)
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A Study on the Surface Hardening of SCM4 Steel Using a Continuous Wave Nd:YAG Laser

연속파형 Nd:YAG 레이저를 이용한 SCM4강의 표면경화에 관한 연구

  • 나기대 (조선대학교 기계설계공학과) ;
  • 신병헌 (조선대학교 일반대학원 정밀기계공학과) ;
  • 신호준 (조선대학교 일반대학원 정밀기계공학과) ;
  • 유영태 (조선대학교 메카트로닉스공학과)
  • Published : 2007.10.15
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Abstract

Laser surface hardening is beneficially used for surface treatment of structural steel. Due to very rapid heating and cooling rates, structural low-alloy steel(SCM4) can be hardened as self quenching. The aim of this research project is to improve the influence of the process laser parameters: laser power, spot size, surface roughness, and traverse speed. The laser beam is allowed to scan on the surface of the workpiece at the constant power(1095W), varying the traverse speed at 0.3m/min, 0.5m/min and 0.8m/min. The optical lens with the elliptical profile is designed to obtain a wide surface hardening area with uniform hardness. From the results of the experiment, it has been shown that the stable hardness is about 600$\sim$700Hv, when the laser power, focal position and the traverse speed are P=1095W, z=0mm and v=0.3m/min.

Keywords

References

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