대한조선학회논문집 (Journal of the Society of Naval Architects of Korea)

  • 제53권6호
  • /
  • Pages.473-481
  • /
  • 2016
  • /
  • 1225-1143(pISSN)
  • /
  • 2287-7355(eISSN)
대한조선학회 (The Society of Naval Architects of Korea)
권호 표지
DOI QR코드

DOI QR Code

FCAW 용접부 개선각 축소에 따른 강도특성

Effects of Reduction Groove Angle on Strength Characteristics of FCAW Weldment

  • 투고 : 2016.05.11
  • 심사 : 2016.10.21
  • 발행 : 2016.12.20
PDF 다운로드
⟨ 이전 논문 다음 논문 ⟩

초록

Thick plate is currently widely used in shipbuilding due to the increasing of size of ships. However, its use has increased welding groove angles and volume. The welder's technique must be good enough to improve productivity while preventing defects. Generally, the groove angle can be reduced to less than a flux-cored arc welding (FCAW) machine setting of $35{\pm}5^{\circ}$, requiring fewer welding passes while maintaining high productivity and reduced heat input. Therefore, welding technique can be prevented by improved mechanical properties and welding deformation. Welding defects such as lack of fusion (LF), lack of penetration (LP) and hot cracking should be considered when reducing the groove angle for related applications. In this study, a welding groove angle of $25{\pm}5^{\circ}$ is verified as suitable for FCAW design and fabrication. The experimental results confirm the effects on the strength characteristics of FCAW weldment when reducing groove angle to improve the productivity of shipbuilding industries.

키워드

참고문헌

  1. AWS, 2010. Structural Welding Code. American Welding Society: Florida.
  2. Bang, H.S. Kim, S.H. Kim, Y.P. & Lee, C.W., 2002. Distribution of Welding Residual Stresses in T-joint Weld with Root Gap. Journal of the Society of Naval Architects of Korea, 39(3), pp.81-88. https://doi.org/10.3744/SNAK.2002.39.3.081
  3. Choi, H.C., 2014. A study on the effect by number of repair welding on the mechanical properties and microstructures of the weldment. Master's Thesis. Ulsan: University of Ulsan.
  4. DNV, 2013a. Fabrication and Testing of Ship Structures. Det Norske Veritas: Oslo.
  5. Han, I.W. Park, Y.H. An, G.B. & An, Y.H., 2009. Development Trends of Steel Plates for Ship Building and Off-Shore Construction and It's Weldability. Journal of the Korean Welding and Joining Society, 27(1), pp.25-33.
  6. Hwang, S.Y., Lee, J.H., Kim, B.J. & Yang, Y.S., 2010. Numerical Analysis of Welding Residual Stresses for Ultra-Thick Plate of EH40 Steel Joined by Tandem EGW. Journal of the Society of Naval Architects of Korea, 47(6), pp.821-830. https://doi.org/10.3744/SNAK.2010.47.6.821
  7. Jang, D.I. & Kim, D.Y., 1994. Evaluation of Charpy and Fatigue Fracture Behavior of Welded Structural Steels. International Journal of Steel Structures. 6(4), pp.179-189.
  8. Jeong, H.C., 1999. Weld Hot Cracking in C-Mn Steel. Journal of Korean Welding Society, 17(5), pp.1-9.
  9. Jeong, H.C. Park, Y.H. An, Y.H. & Lee, J.B., 2007. Mechanical Properties and Microstructures of High Heat Input Welded Tandem EGW Joint in EH36-TM Steel. Journal of the Korean Welding and Joining Society, 25(1), pp.57-62.
  10. Jeong, K.C., 2014. The improvement outlook for welding procedure qualification requirement through comparing analysis of classification society rules and international codes. Master's Thesis. Pusan: Pusan National University.
  11. Kim, J.R. Kim, S.B. Park, Y.H. & Jung, W.G., 1999. A Statistical Study on the Mechanical Property and Chemical Component of Rolled Steel for Welded Structure. Journal of Architectural Institute of Korea, 16(11), pp.52-59.
  12. Kim, J.R. & Park, Y.H., 2003. A Study on Structural Characteristics of SM490A TMC Thick Steel Plates. Journal of Korean Society of Steel Construction, 15(3), pp.331-339.
  13. Kim, C.R., 2012. Welding properties according to bevel angle of thick steel plates. Master's Thesis. Seoul: Soongsil University.
  14. Kim, H.J. & Ryu, H.S., 2010. Characteristics of high heat input welding. Proceeding of the KWS conference, Seoul, 13-14, May 2010, pp.13-17.
  15. Kim, S.B. & Kim, J.R., 2001. Experimental Study on the Fracture Toughness of Welded Connection of Thick Steel Plate. Journal of Architectural Institute of Korea, 17(1), pp.75-82.
  16. Kim, Y.B., 2005. A study on the fracture toughness characteristic for different groove shapes in FCAW weldments. Master's Thesis. Busan: Pusan National University.
  17. KR, 2015. Rules and Guidance for the Classification of Steel Ships: Part 2 Material and Welding. Korean Resister: Busan.
  18. Lee, T.K., 2014. A study on the material properties and weldability of SM490TMC thick steel plate. Master's Thesis. Seoul: Soongsil University.
  19. Park, C.S. Son, Y.R. & Lee, J.S. 2007. A Study on the Application of Vertical Welding to the Shipbuilding with High Deposition Rate. Journal of the Society of Naval Architects of Korea, 44(5), pp.482-487. https://doi.org/10.3744/SNAK.2007.44.5.482
  20. Park, H.S., 2002. Cracking in Welds and Its Prevention(IV) - Hot Cracking in Welds(III). Journal of Korean Welding Society, 20(4), pp.21.
  21. Shin, S.B. & Youn, J.G., 2007. A Study on the Angular Distortion Prediction of Double Siled Multi-Pass Butt Weldment. Journal of the Korean Welding and Joining Society, 25(1), pp.37-41.
  22. Yoon, H.S., 2011. A study of reduction of groove angle for improving welding productivity. STX Offshore & Shipbuilding R&D centre report. Changwon: STX Offshore & Shipbuilding Co. Ltd.