소결체와 저탄소강의 레이저용접시 생성되는 캐비티의 형성과 용접 특성에 대한 연구

조남준; 정우광; 김성욱; 이창희; 김승대; Nam-Joon Cho; Woo-Gwang Jung; Sung-Wook Kim; Chang-Hee Lee; Sung-Dea Kim

Korean Journal of Materials Research, Vol.14, No.4, 300-306, April, 2004

DOI10.3740/MRSK.2004.14.4.300 Export Citation

소결체와 저탄소강의 레이저용접시 생성되는 캐비티의 형성과 용접 특성에 대한 연구

A Study on the Formation of Cavity and Welding Property in the Laser Welding Fusion Zone between Sintered Segment and Mild Steel Shank

조남준, 정우광 ^†, 김성욱¹, 이창희¹, 김승대

국민대학교 공과대학 신소재공학부
¹한양대학교 공과대학 신소재공학부

Nam-Joon Cho, Woo-Gwang Jung^†, Sung-Wook Kim¹, Chang-Hee Lee¹, and Sung-Dea Kim

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

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A laser welding has been made between sintered tip of Fe-Co-W and low carbon steel shank for the diamond saw blade. The welding characteristics and formation of defect has been investigated carefully for the weld fusion zone in different welding condition. Full penetration has been observed for the whole range of heat input investigated in the present work. Bead width and under-fill have been increased with the increase of heat input. With increasing of heat input small cavities were decreased while large cavities were increased. The ratio of total cavity area to the entire weld bead area was not changed significantly with change of heat input. Most of cavities were found near the tip, and supposed to be formed from the pore in the tip.

Keywords:diamond saw blade;laser welding;heat input;Fe-Co-W sintered tip;cavity

[References]

Borisova VV, Kutev SM, Moryaschev SF, Paton Welding J., 5(1), 56 (1993)
Duley WW, Laser Welding, John Wiley & Sons Inc., New York, (1999) (1999)
Lancaster JF : Metallurgy of Welding, 5th ed., Chapman & Hall, London, (1993) (1993)
Katayama S, Seto N, Mizutani M, Matsunawa A, Proc. Int. Congress on Applications of Lasers and Electro-Optics, Dearborn Michigan, p.C16 (2000) (2000)
Matsunawa A, Kim JD, Katayama S, Proc. Int. Congress on Applications of Lasers and Electro-Optics, San Diego California, 83, 073 (1997) (1997)
Easterling K, Introduction to the Physical Metallurgy of Welding, 2nd ed., Butterworths & Co Ltd., London, (1992) (1992)
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Xie J, Proc. Int. Congress on Applications of Lasers and Electro-Optics, San Diego California, 87, D11 (1999) (1999)
Matsunawa A, Seto N, Mizutani M, Katayama S, Proc. Int. Congress on Applications of Lasers and Electro-Optics, Orlando Florida, 85, G151 (1998) (1998)
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German RM, Powder Metallurgy Science, 2nd ed., Metal Powder Industries Federation, Princeton, p.195 (1994) (1994)

[Related Articles]

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

[2] Duley WW, Laser Welding, John Wiley & Sons Inc., New York, (1999) (1999)

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

[4] Katayama S, Seto N, Mizutani M, Matsunawa A, Proc. Int. Congress on Applications of Lasers and Electro-Optics, Dearborn Michigan, p.C16 (2000) (2000)

[5] Matsunawa A, Kim JD, Katayama S, Proc. Int. Congress on Applications of Lasers and Electro-Optics, San Diego California, 83, 073 (1997) (1997)

[6] Easterling K, Introduction to the Physical Metallurgy of Welding, 2nd ed., Butterworths & Co Ltd., London, (1992) (1992)

[7] Pastor M, Zhao H, Martukanitz RP, Debroy T, Welding Journal, June, p.207 (1999) (1999)

[8] Xie J, Proc. Int. Congress on Applications of Lasers and Electro-Optics, San Diego California, 87, D11 (1999) (1999)

[9] Matsunawa A, Seto N, Mizutani M, Katayama S, Proc. Int. Congress on Applications of Lasers and Electro-Optics, Orlando Florida, 85, G151 (1998) (1998)

[10] Lee JN, Moon MH, Powder Metallurgy, Kwanglim, Seoul, p.101 (1981) (1981)

[11] German RM, Powder Metallurgy Science, 2nd ed., Metal Powder Industries Federation, Princeton, p.195 (1994) (1994)