Hostname: page-component-77c89778f8-gq7q9 Total loading time: 0 Render date: 2024-07-18T14:49:57.589Z Has data issue: false hasContentIssue false
  • English
  • Français

Morphology Control of Sulfide in Fe-Cr-S alloys during the solidification

Published online by Cambridge University Press:  15 February 2011

Katsunari Oikawa ,
Tamio Ikeshoji ,
Hajime Mitsui  and
Kiyohito Ishida
Katsunari Oikawa
Affiliation:
Tohoku National Industrial Research Institute, Materials Engineering Division, 4-2-1, Nigatake, Miyagino-ku, Sendai, Japan.
Tamio Ikeshoji
Affiliation:
Tohoku National Industrial Research Institute, Materials Engineering Division, 4-2-1, Nigatake, Miyagino-ku, Sendai, Japan.
Hajime Mitsui
Affiliation:
Graduated Student, Tohoku Univ., Sendai, Japan.
Kiyohito Ishida
Affiliation:
Dept. of Materials Science and Engineering, Tohoku Univ., Sendai, Japan.
Get access

Abstract

The evolution of sulfide morphology in the Fe- (0.3 to 18) mass% Cr -0.3 mass% S alloys during solidification and its modification by additions of elements such as Mn, Ti, Zr and C have been investigated by means of optical microscopy, scanning electron microscopy and X-ray diffraction. The sulfide morphologies in the Fe-Cr-S ternary alloy are classified under three types: (i) cellwall (ii) fine particle and (iii) globular sulfides. The iron-rich cellwall sulfide is formed in the Fe-(0.3-1) %Cr-0.3 %S alloys. This sulfide morphology changes to the globular type with increasing Cr content and the size of that is more than 51gm. Fine sulfide particles of size smaller than 2 gtm also coexist in the Fe-(0.3-5) %Cr-0.3 %S alloys. Zr or Ti additions change this morphology from the globular type to the rod-like type in the Fe-18 %Cr-0.3 %S alloy, but Mn addition does not have the same effect. The mechanism of the formation of different sulfide morphologies is discussed on the basis of phase diagram information.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 580: Symposium E – Nucleation & Growth Processes in Materials , 1999 , 369
Copyright
Copyright © Materials Research Society 2000

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

1. Yamamoto, K., Hasegawa, T., and Takamura, J., Tetsu-to-Hagane 79, p. 1169–1175 (1993).Google Scholar
2. Oikawa, K., Ohtani, H., Ishida, K., and Nishizawa, T., ISIJ Intern. 35, p. 402–408 (1995).Google Scholar
3. Oikawa, K., Kawashita, Y., Ohtani, H., Ishida, K., and Nishizawa, T., J. Jpn. Inst, Met. 59, p. 1207–1214 (1995).Google Scholar
4. Oikawa, K., Ishida, K., and Nishizawa, T., ISIJ Intern. 37, p. 332–338 (1997).Google Scholar
5. Oikawa, K., Sumi, S-I., and Ishida, K., Z. Metallkd. 90, p. 13–17 (1999).Google Scholar
6. Oikawa, K., Sumi, S-I., and Ishida, K., J. Phase Equilibria 20, p. 215–223 (1999).Google Scholar
7. Ouchi, Y., Oikawa, K., Ohunuma, I., and Ishida, K., Materials Science Forum 284–286, p. 509–516 (1998).Google Scholar
8. Kaneko, H., Nishizawa, T., and Tamaki, K., J. Jpn. Inst. Met. 27, p. 299–304 (1963).Google Scholar
9. Keh, A. S. and Van Vlack, L. H., Trans. AIME 206, p. 950–958 (1956).Google Scholar
10. Oikawa, K. Mitsui, H., Ohtani, H., and Ishida, K., ISIJ Intern. in press.Google Scholar
11. Sundman, B., Jansson, B., and Andersson, J.-O., Calphad 9, p. 153–190 (1985).Google Scholar
12. Kaneko, H., Nishizawa, T., and Tamaki, K., J. Jpn. Inst. Met. 27, p. 312–319 (1963).Google Scholar
13. Kaneko, H., Nishizawa, T., and Tamaki, K., J. Jpn. Inst. Met. 27, p. 299–311 (1963).Google Scholar