Korean Journal of Metals and Materials (대한금속재료학회지)

The Korean Institute of Metals and Materials (대한금속재료학회)
권호 표지
DOI QR코드

DOI QR Code

A Study on the Mechanical Properties of Weldments for AISI 409L Ferritic Stainless Steel

자동차 배기계용 AISI 409L 페라이트계 스테인리스강 용접부 물성에 관한 연구

  • Lee, Sang Hwa (Department of Materials Science and Engineering, Dong-A University) ;
  • Shin, Yong Taek (Department of Material Research, Samsung Heavy Industries Co., Ltd.) ;
  • Lee, Hae Woo (Department of Materials Science and Engineering, Dong-A University)
  • 이상화 (동아대학교 신소재공학과) ;
  • 신용택 (삼성중공업 재료연구파트) ;
  • 이해우 (동아대학교 신소재공학과)
  • Received : 2011.12.21
  • Published : 2012.05.25
⟨ Previous Next ⟩

Abstract

In this study, we prepared a sample of AISI 409L weld metals using automotive exhaust manifolds and evaluated their corrosion properties by conducting an anodic polarization test after 10 minute of heat treatment at $900^{\circ}C$. The specimens of AISI 409L transformed fully ferrite. Weld metal was refined more than base metal. Specimen of heat treatment at $900^{\circ}C$ and as weld specimen was formed precipitation. However heat treatment specimen was bulkly formed and coarser than the as weld specimen. The strength measured by 10 Hv highly at heat treatment specimens in comparison with as weld. The increase in strength is attributed to the precipitation of Ti. The result of heat treatment suggest that there was a decrease of current density and high corrosion potential. Following heat treatment process produced Ti precipitation and for this reason, it can restrain Cr-carbide so that steel will have more corrosion resistance.

Keywords

Acknowledgement

Supported by : 동아대학교

References

  1. J. Y. Song, I. S. Lee, and Y. S. Ahn, J. Kor. Soc. Power Syst. Eng. 14, 5 (2010).
  2. S. G. Hong, M. H. Cho, J. K. Kim, and K. B. Kang, J. Kor. weld. Join. Soc. 50, 3 (2008).
  3. M. C. Cho, B. J. Choi, and D. R. Kim, J. Kor. Inst. Met. & Mater. 33, 844 (1995).
  4. M. C. Cho, S. S. Park, and D. R. Kim, J. Corrosion Sci. Soc. of Korea 26, 76 (1997).
  5. A. Joshi and D. F. Stein, Corrosion 28, 321 (1972). https://doi.org/10.5006/0010-9312-28.9.321
  6. K. Osozawa and H. J. Engell , Corros. Sci. 6, 389 (1966). https://doi.org/10.1016/S0010-938X(66)80022-7
  7. H. Yan, H. Bi, X. Li, and Z. Xu, Mater. charact. 60, 204 (2009). https://doi.org/10.1016/j.matchar.2008.09.001
  8. J. L.Cavazos, Mater. Charater. 56, 96 (2006). https://doi.org/10.1016/j.matchar.2005.05.006
  9. M. Chen, C. Wu, and J. Gao, J. Mater. Sci. Technol. 18, 436 (2002).
  10. L. X. Wang, C. J. Song, F. M. Sun, Mater. Design 30, 49 (2009). https://doi.org/10.1016/j.matdes.2008.04.040
  11. M. C. Cho and D. R. Kim, J. Corros. Sci. Soc. of Korea 25, 112 (1996).
  12. J. C. Lippold and D. J. Kotecki, Welding metallurgy and weldabilty of stainless steels, pp. 87-125 John & Wiley & Sons, New York (2005).