Materials Transactions Online

Materials Transactions, Vol.57 No.12 (2016) pp.2110-2115
© 2016 Japan Society of Powder and Powder Metallurgy

Corrosion Properties of the Fe-Cr-Based Soft Magnetic Alloys Fabricated by Metal Injection Molding

Yuki Hamataka1, Masahiko Hatakeyama2, Toshiko Osada3, Hideshi Miura3, Osamu Iwatsu4, Shigeo Tanaka4 and Satoshi Sunada2

1Graduate School of Science and Engineering for Education, University of Toyama, Toyama 930-8555, Japan
2Graduate School of Science and Engineering for Research, University of Toyama, Toyama 930-8555, Japan
3Department of Mechanical Engineering, Kyushu University, Fukuoka 819-0395, Japan
4Taisei Kogyo Co, LTD, Neyagawa 572-0073, Japan

Fe-Cr based soft magnetic alloy, which has excellent soft magnetic properties and practical corrosion resistance is required. SUS430L is one of the candidate Fe-Cr based alloys with soft magnetic property in stainless steels. To improve soft magnetic properties, sintering process is useful to make low Cr alloy by adding the pure iron powder to SUS430L powder. While, reduction of Cr content expected to deteriorate corrosion resistance of the alloys. To evaluate the effect of Cr content on mechanical and electrochemical properties of the soft magnetic alloys, sintered SUS430L based alloys with different Cr content were prepared using metal injection molding process. We carried out slow strain rate tensile (SSRT) test and open circuit potential (OCP) to evaluate their mechanical properties and electrochemical properties. The results of SSRT and OCP suggest that Cr content enhance stress corrosion cracking. OCP value was affected formation of passive film on elastic deformation and collapse of it on plastic deformation during SSRT test.

This Paper was Originally Published in Japanese in J. Jpn. Soc. Powder Powder Metallurgy 63 (2016) 291-297.

[doi:10.2320/matertrans.Y-M2016833]

(Received 2016/06/28; Accepted 2016/09/08; Published 2016/11/25)

Keywords: slow strain rate tensile, stress corrosion cracking, stainless steels, metal injection molding (MIM), soft magnetic properties, iron-chromium alloys

PDF(member)PDF (member) PDF(organization)PDF (organization) Order DocumentOrder Document Table of ContentsTable of Contents

REFERENCES

  1. Y. Sano, T. Osada, K. Kudou, F. Tsumori, H. Miura, O. Iwatsu, M. Taie and S. Tanaka: Journal of the Japan Society of Powder and Powder Metallurgy. 62 (2015) 431-436.
  2. T. Kato and T. Tomioka: Denki Seiko (Electr. Furn. Steel) 37 (1966) 265-272.
  3. T. Kato, I. Sekio and K. Kusaka: Denki Seiko (Electr. Furn. Steel) 41 (1970) 127-132.
  4. T. Kato and I. Sekio: Denki Seiko (Electr. Furn. Steel) 42 (1971) 41-54.
  5. T. Kato and T. Kato: Denki Seiko (Electr. Furn. Steel) 45 (1974) 161-167.
  6. T. Kato, S. Yoshino, H. Kanazawa, Y. Oshima, and S. Yahagi: Journal of the Magnetics Society of Japan. 18 (1994) 453-456.
  7. T. Kato, S. Yoshino and T. Kato: Journal of the Magnetics Society of Japan. 19 (1995) 441-444.
  8. T. Kato, T. Tomio, M. Kawamura and Y. Nakazima: Journal of the Japan Society of Powder and Powder Metallurgy. 40 (1993) 1246-1252.
  9. Y. Hamataka, M. Hatakeyama, T. Osada, H. Miura, O. Iwatsu, S. Tanaka and S. Sunada: Journal of the Japan Society of Powder and Powder Metallurgy. 63 (2016) 291-297.
  10. M. Chiba: Kobe Steel Engineering reports 61 (2011) 57-61.


[JIM HOME] [JOURNAL ARCHIVES]

© 2016 Japan Society of Powder and Powder Metallurgy
Comments to us : editjt@jim.or.jp