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

  • 제20권3호
  • /
  • Pages.342-349
  • /
  • 2011
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  • 2508-5093(pISSN)
  • /
  • 2508-5107(eISSN)
한국생산제조학회 (The Korean Society of Manufacturing Technology Engineers)
권호 표지

자동차용 무침입형 극저탄소강의 파이버 레이저 용접에 대한 연구

A Study on the Fiber Laser welding of Ultra-Low Carbon Interstitial Free Steel for Automotive

  • 오용석 (조선대 첨단부품소재공학과) ;
  • 신호준 (조선대 레이저가공연구실) ;
  • 양윤석 (조선대 첨단부품소재공학과) ;
  • 황찬연 (조선대 첨단부품소재공학과) ;
  • 유영태 (조선대학교 메카트로닉스공학과)
  • 투고 : 2010.06.11
  • 심사 : 2011.03.28
  • 발행 : 2011.06.15
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초록

The purpose of this paper is to describe experimental results about the butt welding and bead on plate welding of the high power Continuous Wave (CW) Fiber laser for Ultra-low carbon Interstitial Free(IF) steel plate for gear part of car. After being welded of the gear parts by the fiber laser and electron beam Microstructures of melting zone had been mixed acicular, granular bainitic, quasi-polygonal and widmanstatten ferrite because of a radical thermal diffusion after welding, difference of critical volume and grain size. As a result of experiment, when gear parts were welded by the fiber laser and electron beam, the fiber laser welding has been stable properties without internal defects more than the electron beam welding. Therefore it has the very advantages of welding high quality and productivity more than conventional melting method. The optimal welding processing parameters for gear parts were as follows : the laser power and welding speed were 3kWatt, 30mm/sec respectively. At this time heat input was $21.2{\times}10^3J/cm^2$.

키워드

참고문헌

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