소결체와 저탄소강의 레이저용접 특성에 미치는 입열량 및 용접부 성분변화의 영향

정우광; 조남준; 김성욱; 이창희; 김승대; 이주형; 박화수; Woo-Gwang Jung; Nam-Joon Cho; Sung-Wook Kim; Chang-Hee Lee; Sung-Dea Kim; Joo-Hyung Lee; Hwa-Soo Park

Korean Journal of Materials Research, Vol.14, No.6, 425-431, June, 2004

DOI10.3740/MRSK.2004.14.6.425 Export Citation

소결체와 저탄소강의 레이저용접 특성에 미치는 입열량 및 용접부 성분변화의 영향

Influence of Heat Input and Weld Bead Composition on Welding Property in the Laser Welding between Sintered Segment and Mild Steel Shank

정우광 ^†, 조남준, 김성욱¹, 이창희¹, 김승대, 이주형, 박화수

국민대학교 공과대학 신소재공학부
¹한양대학교 공과대학 신소재공학부

Woo-Gwang Jung^†, Nam-Joon Cho, Sung-Wook Kim¹, Chang-Hee Lee¹, Sung-Dea Kim, Joo-Hyung Lee, and Hwa-Soo Park

School of Advanced Materials Engineering, Kookmin University, 861-1, Jeongneung-Dong, Chongnung-dong, Songbuk-gu, Seoul, 136-702, Korea
¹Division of Materials Science and Engineering, College of Engineering, Hanyang University, Seoul 133-791, Korea

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A laser welding was applied between sintered tip of Fe-Co-W and low carbon steel shank for the diamond saw blade. The welding characteristics and formation of defects were investigated carefully for the weld fusion zone in different welding condition. Dendrite arm spacing in weld bead decreased with decrease of heat input. Co and W increased and Fe decreased in the weld fusion zone with increase of the heat input. The corresponding change of composition was observed with the change of beam position. The maximum and total length of crack decreased with increase of the heat input. The crack in weld bead was propagated along the dendrite boundary and was caused mainly by the segregation of constituent during the solidification.

Keywords:diamond saw blade;laser welding;heat input;beam position;crack;segregation

[References]

Borisova VV, Kutev SM, Moryaschev SF, Paton Welding J., 5(1), 56 (1993)
Duley WW: CO 2 Lasers, Effects and Applications, p. 248, Academic Press, Inc., New York, (1976) (1976)
Norrish J: Advanced Welding Processes, p. 195, Institute of Physics Publishing, Ltd, Bristol, UK, (1992) (1992)
Lindberg RA, Braton NR: Welding and Other Joining Processes, p. 124, Allyn and Bacon, Inc., Boston, (1976) (1976)
Cho NJ, Jung WG, Kim SW, Lee CH, Kim SD, J. MRS-K, 14(4), 300 (2004)
Flemings MC: Solidification Processing, p. 148, McGraw-Hill Inc.New York, (1974) (1974)
Kou S: Welding Metallurgy, p. 216-220, John Wiley & Sons, New York, (1987) (1987)
Lancaster JF: Metallurgy of Welding, 5th ed., p. 192, Chapman & Hall, London, UK, (1993) (1993)
Masubuchi K: Analysis of Welded Structures, p. 528, Pergamon Press Ltd., London, UK, (1980) (1980)

[Related Articles]

[1] Borisova VV, Kutev SM, Moryaschev SF, Paton Welding J., 5(1), 56 (1993)

[2] Duley WW: CO 2 Lasers, Effects and Applications, p. 248, Academic Press, Inc., New York, (1976) (1976)

[3] Norrish J: Advanced Welding Processes, p. 195, Institute of Physics Publishing, Ltd, Bristol, UK, (1992) (1992)

[4] Lindberg RA, Braton NR: Welding and Other Joining Processes, p. 124, Allyn and Bacon, Inc., Boston, (1976) (1976)

[5] Cho NJ, Jung WG, Kim SW, Lee CH, Kim SD, J. MRS-K, 14(4), 300 (2004)

[6] Flemings MC: Solidification Processing, p. 148, McGraw-Hill Inc.New York, (1974) (1974)

[7] Kou S: Welding Metallurgy, p. 216-220, John Wiley & Sons, New York, (1987) (1987)

[8] Lancaster JF: Metallurgy of Welding, 5th ed., p. 192, Chapman & Hall, London, UK, (1993) (1993)

[9] Masubuchi K: Analysis of Welded Structures, p. 528, Pergamon Press Ltd., London, UK, (1980) (1980)