Korean Journal of Metals and Materials (대한금속재료학회지)

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

DOI QR Code

Strength Change in Ultra Low Carbon Steel due to Carburizing Heat Treatment for Hot Press Forming

HPF 적용을 위한 극저탄소강의 강도에 미치는 침탄 열처리의 영향

  • Kang, Soo Young (Dep. of Metalluygical & Material Engineering, Inha Technical College)
  • 강수영 (인하공업전문대학 금속재료과)
  • Received : 2012.02.21
  • Published : 2012.06.25
⟨ Previous Next ⟩

Abstract

Strength change in ultra low carbon steel carburized at $880^{\circ}C$ and $930^{\circ}C$ for 10, 30, 60 and 120 minutes was investigated. The results were analyzed by a tensile test, chemical composition analysis, optical microscopy and scanning electron microscopy. Stress in the 0.5% strain specimen in the tensile test increased as the time treated at $880^{\circ}C$ and $930^{\circ}C$ increased, because the carbon diffusion layer and the martensite of the specimen increased with increasing treatment time. Martensite was found in the ferrite region in the specimen treated at $880^{\circ}C$, which is attributed to grain boundary diffusion.

Keywords

References

  1. S. Y. Kang, J. S. Lee, J. H. Kim, H. K. Lee, and K. N. Lee, Trans. Mater. Proc. 5, 263 (1996).
  2. H. S. Kim, M. H. Seo, S. J. Kim, S. C, Baik, W. J. Bang, and H. R. Lee, J. Kor. Inst. Met. & Mater. 9, 1076 (2001).
  3. M. Shibata and M. Oonishi, SAE No 980550.
  4. M. Shibata and K. Makino, Materials Japan, 37, 525 (1998). https://doi.org/10.2320/materia.37.525
  5. D. H. Lee, C. S. Yoon, and J. D. Lim, J. Kor. Soc. Heat Treatment, 17, 73 (2004).
  6. J. H. Lee and W. C. Jeong, J. Kor. Soc. Heat Treatment 23, 301 (2010).
  7. S. W. Han, J. Kor. Inst. Met. & Mater. 1, 47 (1978).
  8. G. W. Bang, J. Kor. Soc. Heat Treatment 1, 55 (1988).
  9. Takeshi Naitoh, J. Kor. Soc. Heat Treatment 12, 179 (1999).
  10. B. H. Jung, J. Kor. Soc. Heat Treatment 23, 34 (2010).