Journal of the Korean Society of Manufacturing Process Engineers (한국기계가공학회지)

The Korean Society of Manufacturing Process Engineers (한국기계가공학회)
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Characteristics of Metal Surface Heat Treatment by Diode Laser

다이오드 레이저를 이용한 금속 표면 열처리 특성

  • 최성대 (금오공과대학교 기계공학부) ;
  • 정선환 (금오공과대학교 기계공학부) ;
  • 김기만 (금오공과대학교 기계공학부) ;
  • 양승철 (금오공과대학교 대학원 기계공학과) ;
  • 김잠규 (금오공과대학교 대학원 기계공학과)
  • Published : 2007.09.30
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Abstract

An experimental investigation with diode laser system was carried out to study the effect of surface heat treatment on the die materials(SM45C, SKD11, SK3). The surface heat treatment characteristics of the laser beam are evaluated using hardness tests, optical microscopy, X-ray diffraction and energy dispersive X-ray spectroscopy(EDS). Results indicated that the beam size, focal length, feed rates are changed surface hardened characteristics. SM45C is higher hardness than other materials and composed to martensite grain at hardened zone, whereas other materials(SKD11, SK3)are low hardness than expected and composed to austenite and allayed martensite at hardened zone. The intensive X-ray diffraction patterns of (110)-(200)-(211) is detected hardened surface and the hardened surface distributed plenty of carbon density than metal zone.

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