Materials Transactions Online

Materials Transactions, Vol.54 No.03 (2013) pp.344-349
© 2013 The Japan Institute of Metals

Increasing Surface Hardness of AISI 1045 Steel by AIH-FPP/Plasma Nitriding Treatment

Shoichi Kikuchi1, Takahiro Fukuoka2, Takuma Sasaki2, Jun Komotori3, Kengo Fukazawa4, Yoshitaka Misaka4 and Kazuhiro Kawasaki4

1Department of Mechanical Engineering, College of Science and Engineering, Ritsumeikan University, Kusatsu 525-8577, Japan
2Graduate School of Science and Technology, Keio University, Yokohama 223-8522, Japan
3Department of Mechanical Engineering, Faculty of Science and Technology, Keio University, Yokohama 223-8522, Japan
4Research and Development Center, Neturen Co., Ltd., Hiratsuka 254-0013, Japan

In order to increase surface hardness of AISI 1045 steel, a new hybrid surface modification; combination of atmospheric-controlled induction-heating fine particle peening (AIH-FPP) and plasma nitriding, was developed. Surface microstructures of plasma nitrided specimens pre-treated with AIH-FPP using Cr shot particles were characterized by an optical microscope, a scanning electron microscope (SEM), an energy dispersive X-ray spectrometer (EDX) and X-ray diffraction analysis (XRD). As results, the nitrided layer was formed at the surface of the specimen with Cr diffused layer induced by AIH-FPP. This nitrided layer showed higher hardness than that of without AIH-FPP specimen. This was because CrN was formed at the surface of the AIH-FPP/Plasma nitriding treated specimen. And, the surface hardness of the nitrided layer tended to increase as the Cr concentration in the surface layer decreased. It was clarified that the pore formation during the AIH-FPP/Plasma nitriding treatment was inhibited by decreasing Cr concentration. These results suggest that the proposed hybrid surface treatment remarkably increases surface hardness of AISI 1045 steel.

(Received 2012/10/12; Accepted 2012/12/25; Published 2013/02/25)

Keywords: surface modification, atmospheric-controlled induction-heating fine particle peening (AIH-FPP), nitriding, hardness

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REFERENCES

  1. K. Genel, M. Demirkol and M. Capa: Mater. Sci. Eng. A 279 (2000) 207-216.
  2. A. Alsaran, M. Karakan and A. Celik: Mater. Charact. 48 (2002) 323-327.
  3. M. Pellizzari, A. Molinari and G. Straffelini: Mater. Sci. Eng. A 352 (2003) 186-194.
  4. W. P. Tong, C. Z. Liu, W. Wang, N. R. Tao, Z. B. Wang, L. Zuo and J. C. He: Scr. Mater. 57 (2007) 533-536.
  5. A. Çelik and S. Karadeniz: Surf. Coat. Tech. 72 (1995) 169-173.
  6. S. Kikuchi and J. Komotori: J. Solid Mech. Mater. Eng. 2 (2008) 1444-1450.
  7. S. Kikuchi, Y. Nakahara and J. Komotori: Int. J. Fatigue 32 (2010) 403-410.
  8. Y. Kameyama, J. Komotori and E. Shimodaira: J. Mater. Testing Res. Association of Japan 48 (2003) 53-56.
  9. Y. Kameyama and J. Komotori: J. Solid Mech. Mater. Eng. 2 (2008) 1338-1347.
  10. Y. Kameyama and J. Komotori: Wear 263 (2007) 1354-1363.
  11. Y. Kameyama and J. Komotori: J. Mater. Process. Tech. 209 (2009) 6146-6155.
  12. H. Nanbu, S. Kikuchi, Y. Kameyama and J. Komotori: J. Solid Mech. Mater. Eng. 3 (2009) 328-335.
  13. T. Ito, S. Kikuchi, Y. Kameyama, J. Komotori, K. Fukazawa, Y. Misaka and K. Kawasaki: J. Japan Inst. Metals 74 (2010) 533-539.
  14. T. Fukuoka, Y. Ujiie, J. Komotori, K. Fukazawa, Y. Misaka and K. Kawasaki: Procedia Eng. 10 (2011) 1503-1508.
  15. T. Fukuoka, S. Kikuchi, J. Komotori, K. Fukazawa, Y. Misaka and K. Kawasaki: J. Japan Inst. Metals 75 (2011) 372-378.
  16. A. Sasago, S. Kikuchi, Y. Kameyama, J. Komotori, K. Fukazawa, Y. Misaka and K. Kawasaki: J. Japan Inst. Metals 72 (2008) 347-352.
  17. S. S. Hosmani, R. E. Schacherl and E. J. Mittemeijer: Haerterei Tech. Mitt. 63 (2008) 139-146.


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