Laser Solutions (한국레이저가공학회지)

Korean Society of Laser Processing (한국레이저가공학회)
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Strengthening of Steel Sheets for Automobile by $CO_2$ Laser Beam Irradiation

자동차용 강판의 $CO_2$ 레이저 빔 조사 강화

  • Seo, Jung (Korea Institute of Machinery & Materials) ;
  • Lee, Je-Hoon (Korea Institute of Machinery & Materials) ;
  • Kim, Jung-Oh (Korea Institute of Machinery & Materials) ;
  • Oh, Sang-Jin (Korea Institute of Machinery & Materials) ;
  • Cho, Won-Seok (R&D Division for Hyundai Motor Company & Kia Motors Corporation) ;
  • Lee, Doo-Hwan (R&D Division for Hyundai Motor Company & Kia Motors Corporation) ;
  • Shin, Chul-Soo (R&D Division for Hyundai Motor Company & Kia Motors Corporation)
  • 서정 (한국기계연구원 레이저기술연구그룹) ;
  • 이제훈 (한국기계연구원 레이저기술연구그룹) ;
  • 김정오 (한국기계연구원 레이저기술연구그룹) ;
  • 오상진 (한국기계연구원 레이저기술연구그룹) ;
  • 조원석 (현대.기아 연구개발본부) ;
  • 이두환 (현대.기아 연구개발본부) ;
  • 신철수 (현대.기아 연구개발본부)
  • Published : 2001.08.01
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Abstract

The laser strengthening of 35kgf/㎟ and 60kgf/㎟ grade steel sheets is investigated by using CO$_2$ laser beam irradiation. The increase of tensile strength is dominated by the number of fully penetrated melting line. Also. the optimal laser input energy(hardness) and the number of melting line (melting width) are important variables for laser strengthening. Local strengthening by laser beam may be effective for the weight reduction of components where the tailored welded blank can not be applied.

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