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Effect of Molybdenum Content on Hardenability of Boron and Molybdenum Combined Added Steels

  • Kyohei Ishikawa
  • Hirofumi Nakamura
  • Ryuichi Homma
  • Masaaki Fujioka
  • Manabu Hoshino
Conference paper
Part of the The Minerals, Metals & Materials Series book series (MMMS)

Abstract

The upper limit of the Mo-B combined effect on hardenability was investigated in 0.15%C-B added steels containing 0 to 1.5%Mo. The hardenability of Mo-B steels increases up to 0.75%Mo suppressing the precipitation of Fe23(C,B)6. In contrast, the effect decreases over 0.75%Mo where Mo2FeB2 precipitates instead of Fe23(C,B)6. By thermodynamic calculation, it is suggested that Mo2FeB2 precipitates during reheating and the precipitation of Mo2FeB2 decreases the solute B content in reheating, which determines the limit of the Mo-B combined effect.

Keywords

Hardenability Boron Segregation Molybdenum Combined effect 

References

  1. 1.
    Grossman MA (1942) Trans AIME 150:227Google Scholar
  2. 2.
    Ueno M, Itoh K (1988) Tetsu-to-Hagané 74:910Google Scholar
  3. 3.
    Simcoe CR, Elsea AR, Manning GK (1956) Trans AIME J Metals 8:984Google Scholar
  4. 4.
    Morral JE, Cameron JB (1977) Met Trans 8A:1817Google Scholar
  5. 5.
    Yoshida S, Ushioda K, Abe Y, Ågren J (2012) Tetsu-to-Hagané 98:482CrossRefGoogle Scholar
  6. 6.
    Ueno M, Inoue T (1973) Trans Iron Steel Inst Jpn 13:210Google Scholar
  7. 7.
    Ohno Y, Okamura Y, Matsuda S, Yamamoto K, Mukai T (1987) Tetsu-to-Hagané 73:1010Google Scholar
  8. 8.
    Fujishiro T, Hara T, Shigesato G (2015) Tetsu-to-Hagané 101:300Google Scholar
  9. 9.
    Habu R, Miyata M, Sekino S, Goda S (1974) Tetsu-to-Hagané 60:1470CrossRefGoogle Scholar
  10. 10.
    Tamehiro H, Murata M, Habu R, Nagumo M (1986) Tetsu-to-Hagané 74:458CrossRefGoogle Scholar
  11. 11.
    Asahi H (2002) ISIJ Int 42:1150Google Scholar
  12. 12.
    Hara T, Asahi H, Uemori R, Tamehiro H (2004) ISIJ Int 44:1431Google Scholar
  13. 13.
    Ueno M, Itoh K (1988) Tetsu-to-Hagané 74:918Google Scholar
  14. 14.
    Ueno M, Itoh K (1988) Tetsu-to-Hagané 74:1073Google Scholar
  15. 15.
    Hodge JM, Orehoski MA (1946) Trans Metall Soc AIME 167:627Google Scholar
  16. 16.
    Kuribayashi K, Iloriuchi R (1988) Maraging steels; recent development and application. In: Wilson RK (ed) Proceedings of the symposium of TMS annual meeting. TMS, p 157Google Scholar
  17. 17.
    Kondo Y, Watanabe T, Ohira S, Takagi K, Ide T (1987) Bull Jpn Inst Met 26:302CrossRefGoogle Scholar
  18. 18.
    Yamada K, Ohtani H, Hasebe M (2009) J Jpn Inst Met 73:180Google Scholar

Copyright information

© The Minerals, Metals & Materials Society 2018

Authors and Affiliations

  • Kyohei Ishikawa
    • 1
  • Hirofumi Nakamura
    • 1
  • Ryuichi Homma
    • 2
  • Masaaki Fujioka
    • 1
  • Manabu Hoshino
    • 1
  1. 1.Nippon Steel & Sumitomo Metal Corporation, Steel Research LaboratoriesFuttsuJapan
  2. 2.Nippon Steel & Sumitomo Metal Corporation, Kimitsu R&D LaboratoriesChibaJapan

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