본문 바로가기
HOME> 논문 > 논문 검색상세

논문 상세정보

Pe-Co-Ni 분말 소결 금속과 탄소강의 이종재료간 레이저 용접부의 결함형성기구 연구
A Study on the Formation Mechanism of Discontinuities in $CO_2$ Laser Fusion Zone of Fe-Co-Ni Sintered Segment and Carbon Steel

신민효   (한양대학교 신소재공학부UU0001519  ); 김태웅   (이화다이아몬드공업㈜기술연구소CC0066689  ); 박희동   (이화다이아몬드공업㈜기술연구소CC0066689  ); 이창희   (한양대학교 신소재공학부UU0001519  );
  • 초록

    In this study, the formation mechanism of discontinuities in the laser fusion zone of diamond saw blade was investigated. $CO_2$ laser weldings were conducted along the butt between Fe base sintered tip and carbon steel shank with sets of variable welding parameters. The effect of heat input on irregular humps, outer cavity, inner cavity and bond strengh was evaluated. The optimum heat input to have a proper humps was in the range of 10.4~ $17.6kJm_{-1}$ . With increasing heat input, both outer and inner cavities were reduced. The outer cavity was caused by insufficient refill of keyhole, while inner cavity was caused by trapping of bubble in molten metal. The bubble came from sintered tip and intensive vaporization at bottom tip of the keyhole. A gas formation and low melting point element vaporization were not occurred during welding. We could not find any relationship between bond strength and amount of discontinuities. Because the fracture were occurred in not only sintered tip but also carbon steel shank due to hardness distributions.


  • 주제어

    Formation mechanism .   Discontinuties .   Laser fusion zone .   Diamond saw blade .   Fe base sintered tip .   Carbon steel shank .   Heat input .   Insufficient refill of keyhole .   Trapping of bubble.  

  • 참고문헌 (13)

    1. Michael M. Chen and Jeannine A. Bos Melt flowin deep penetration welding. Section F-ICALEO1998. 187-196 
    2. T. Chande and J. Mazumder Estimating effects ofprocessing conditions and variable properties oponpool shape. cooling rates. and absorption coefficient inlaser welding. J.Appl, Phys. 56-7. (1984) . 1981-1986 
    3. Seiji Katayama. Naoki Seto. Jong-Do Kim and AkiraMatsunawa Formation mechanism and reductionmethod of porosity in laser welding of stainlessstee l, Section G-ICALEO 1997, 83-92 
    4. Minhyo Shin. Changhee Lee. Taiwoung Kim. HeedongPark Formation mechanism of cavity in the C02Laser fusion zone between sintered Fe-base segmentand mild steel sh와1k of diamond saw blade. Proceedingsof the 2002 Spring annual meeting of KWS.232-235 (in Korean) 
    5. Minhyo Shin. Changhee Lee. Taiwoung Kim. HeedongPark A study on formation of imperfections inCWC(갱 Laser weld of diamond saw blade. Proceedingsof IWC-Korea 2002 Oct. . 639-643 
    6. M Klassen. J. 않upin and G. Sepold : Process instabilitiesby laser beam welding of aluminum alloys generatedby laser modulations. Laser in material processing.Proceedings euroto series. munich. (1997) . 137-146 
    7. M. Pastor. H. Zhao. R.P. Martukanitz and T.DebroyPorosity. Underfill and magnesiom loss duringcontinuous wave Nd:YAG laser welding of thinplates of aluminum alloys 5182 and 5754. WeldingJournal, 6 (1999). 207-216 
    8. Shigeki F버inaga , Hiroo Takenaka. Tom NarikiyoDirect observation of keyhole behaviour during pulsemodulated high-power Nd:YAG laser irradiation. J.Appl, Phys .. 33(2000). 492-497 
    9. J.W.Park. C.H.Lee C02 laser weldability betweensintered Co. Co+Ni alloy and carbon stee l, Journalof KSLP. 3-2(200). 13-24 (in Korean) 
    10. K.Girard. J.M.Jouvard. Ph. Naudy Little porositytrapping during laser spot welding of tantalum.Section F-ICALEO 1998. 168-178 
    11. V.V Borisova. S.M. Kutev and S.F. MoryaschevLaser welding diamond bearing segments to steelholders. Welding Journal, 5(1993). 56-58 
    12. Jeong Hoon Lee and Chang Hee Lee Characteristicof Brazed Joint of Sintered Bronze/Steel UsingAg-Cu-Zn-Cd Type Filler Materials , Journal of KWS.7-3(1999). 79-89 (in Korean) 
    13. W.W.Duley. Laser Welding. John Wiley & Sons Inc..(1999) 

 저자의 다른 논문

 활용도 분석

  • 상세보기

    amChart 영역
  • 원문보기

    amChart 영역

원문보기

무료다운로드
  • NDSL :
  • 대한용접접합학회 : 저널
유료다운로드

유료 다운로드의 경우 해당 사이트의 정책에 따라 신규 회원가입, 로그인, 유료 구매 등이 필요할 수 있습니다. 해당 사이트에서 발생하는 귀하의 모든 정보활동은 NDSL의 서비스 정책과 무관합니다.

원문복사신청을 하시면, 일부 해외 인쇄학술지의 경우 외국학술지지원센터(FRIC)에서
무료 원문복사 서비스를 제공합니다.

NDSL에서는 해당 원문을 복사서비스하고 있습니다. 위의 원문복사신청 또는 장바구니 담기를 통하여 원문복사서비스 이용이 가능합니다.

이 논문과 함께 출판된 논문 + 더보기