Advertisement

Journal of Materials Science

, Volume 31, Issue 7, pp 1865–1871 | Cite as

Modification of hypoeutectic low alloy white cast irons

  • Ma Qian
  • Wang Chaochang
  • Shoji Harada
Article

Abstract

In order to modify the continuous network of eutectic cementite normally found in low alloy white cast irons into a dispersive distribution, strategies of controlling the morphology of eutectic cementite by additives are discussed. Qualitative arguments are presented and applied to the development of a complex modifier REAINTi. With the addition of this modifier to low carbon white cast irons nearly one fifth of the original eutectic cementite network can be modified into blocky particles in the plane of polish, and one third into isolated irregular ones. The experimental data shows that Ti(CN) may act as an effective nucleant or a grain refiner for eutectic cementite. The modification effects of rare earth elements are attributed to their abilities to purify the melt, promote divorced eutectic growth and refine the microstructure. Aluminium contributes to the modification by its purification effect.

Keywords

Polymer Microstructure Rare Earth Cementite Cast Iron 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. 1.
    J. Richard and I. C. H. Hughes, BCIRA J. Res. Develop. 9 (1961) 1, 11.Google Scholar
  2. 2.
    R. W. Heine and J. E. Barton, Trans. AFS. 85 (1977) 379.Google Scholar
  3. 3.
    G. F. L. Powell, Metals Forum, 3 (1980) 37.Google Scholar
  4. 4.
    H. Morrogh and P. Tutsch, JISI 176 (1954) 382.Google Scholar
  5. 5.
    B. Zhao and E. W. Langer, Scand. J. Metall. 11 (1982) 287.Google Scholar
  6. 6.
    Rao Qichang and Zhou Qingde, J. XI'AN Jiaotong Uni. (in Chinese), 19 (1985) 1, 95.Google Scholar
  7. 7.
    A. I. Yatsenko, T. I. Gerosimova and G. E. Belai, Russian Castings Production, 5 (1971) 202.Google Scholar
  8. 8.
    Wang Chao Chang, Hsu Heng Tsun and Ma Qian, Mater. Sci. Tech. 6 (1990) 905.CrossRefGoogle Scholar
  9. 9.
    G. R. Strong and R. W. Heine, Trans. AFS. 82 (1974) 361.Google Scholar
  10. 10.
    D. P. Ivanov, G. F. Gorbul'skii, V. M. Popov, L. B. Kogan and A. V. Ostroverkhov, Russian Castings Production, 8 (1972) 322.Google Scholar
  11. 11.
    in “Metals Handbook”, Ninth edition, vol.1 (ASM, 1978) p. 78.Google Scholar
  12. 12.
    Ma Qian, Wang Zhaochang and Liu Baicheng, J. Mater. Sci. 30 (1995) 3383.CrossRefGoogle Scholar
  13. 13.
    Kirchi Taniguchi, J. Japan Foundrymen's Soc. 47 (1975) 320.Google Scholar
  14. 14.
    Zhu Jun, Dong Hongbiao, Wang Minzhong and Zhong Xueyou, J. Uni. Sci. Tech. Beijing (in Chinese), 16 (1994) 122.Google Scholar
  15. 15.
    I. Minkoff, “Solidification and Cast Structure” (John Wiley, Chichester, 1986), pp. 197.Google Scholar
  16. 16.
    R. Elliott, “Eutectic Solidification Processing” (Butterworths, London, 1983) pp. 62–67, 151–155.Google Scholar
  17. 17.
    A. Sawamoto, K. Ogi and K. Matsuda, J. Japan Foundrymen's Soc. 55 (1983) 412.Google Scholar
  18. 18.
    Japanese patent Showa 47-18123 (1972).Google Scholar
  19. 19.
    C. R. Jr Loper and H. K. Baik, Trans. AFS, 97 (1989) 1001.Google Scholar
  20. 20.
    J. Keverian, H. F. Taylor and J. Wulff, Amer. Foundryman, 23 (1953) 6, 85.Google Scholar
  21. 21.
    J. F. Wallace, ibid—, 83 (1975) 363.Google Scholar
  22. 22.
    G. F. Ruff and J. F. Wallace, ibid—, 84 (1976) 705.Google Scholar
  23. 23.
    M. C. Flemings, “Solidification Processing” (McGraw-Hill, New York, 1974) p. 300.Google Scholar
  24. 24.
    B. L. Bramfitt, Metall. Trans. 1 (1970) 1987.CrossRefGoogle Scholar
  25. 25.
    D. Turnbull and R. Vonnrgut, Ind. Eng. Chem. 44 (1952) 1292.CrossRefGoogle Scholar
  26. 26.
    T. Ohashi, T. Hiromoto, H. Fujii, Y. Nuri and K. Asnno, J. Iron and Steel Institute Japan. 62 (1976) 614.CrossRefGoogle Scholar
  27. 27.
    J. V. Wood, “Solidification and Casting of Metals” (The Metals Society, London, 1979) p. 179.Google Scholar
  28. 28.
    Y. Nuri, T. Ohashi. T. Hiromoto and O. Kitamura, J. Iron and Steel Institute Japan. 66 (1980) 618.CrossRefGoogle Scholar
  29. 29.
    Y. Nuri, T. Ohashi, T. Hiromoto and O. Kitamura, ibid—., 66 (1980) 628.CrossRefGoogle Scholar
  30. 30.
    N. Kayama, K. Nashimota and K. Suzuki, ibid—., 55 (1983) 621.Google Scholar
  31. 31.
    H. Nakae, K. Takai, K. Okauchi and H. Koizumi, J. Japan Foundrymen's Soc. 63 (1991) 692.Google Scholar
  32. 32.
    M. J. Duggin, Trans. Met. Soc. AIME. 242 (1968) 1091.Google Scholar
  33. 33.
    Xie Xiwen, Mater. Sci. Eng. (Chinese), 1 (1985) 44.Google Scholar
  34. 34.
    T. B. Massalski, “Binary Alloy Phase Diagrams”, 2nd Edition (ASM International, 1990).Google Scholar
  35. 35.
    in “Handbook of Chemistry and Physics”, 65th Edition (CRC Press, 1984–1985).Google Scholar
  36. 36.
    A. Golgsmith, T. E. Waterman and H. J. Hirchhon, “Handbook of Thermophysical Properties of Solid Materials”, Vol. 4 (Pergamon Press, 1962).Google Scholar
  37. 37.
    in “Imono Handbook”, 3rd. Edition (The Japan Foundrymen's Society, 1973) p.135.Google Scholar
  38. 38.
    O. Komarov and A. Ershovich, Russian Castings Production, 6 (1965) 301.Google Scholar
  39. 39.
    P. K. Basutkr and C. R. Loper, Trans. AFS. 77 (1969) 321.Google Scholar
  40. 40.
    M. A. Gadd and G. H. J. Bennett, in “The Physical Metallurgy of Cast Iron”, edited by H. Fredriksson and M. Hillert (Elsevier, New York, 1985) p. 99.Google Scholar
  41. 41.
    S. A. Saltykov, “Srereometrische Metallographie” (Leipzig: VEB Deut. Verl. F. Grundstoffindustrie, 1974) p. 334.Google Scholar

Copyright information

© Chapman & Hall 1996

Authors and Affiliations

  • Ma Qian
    • 1
  • Wang Chaochang
    • 2
  • Shoji Harada
    • 3
  1. 1.Department of Mechanical EngineeringTsinghua UniversityBeijingPeople’s Republic of China
  2. 2.Department of MetallurgyUniversity of Science and Technology, BeijingBeijingPeople’s Republic of China
  3. 3.Department of Mechanical EngineeringKyushu Institute of TechnologyKitakyushuJapan

Personalised recommendations