Journal of the Korean Society for Heat Treatment (열처리공학회지)

The Korean Society for Heat Treatment (한국열처리공학회)
권호 표지

Effect of Low Tempering Temperature on Corrosion Resistance of 420J2 Stainless Steel

420J2 스테인리스강의 내식성에 미치는 저온 템퍼링의 영향

  • Jung, B.H. (Division of Materials Science & Engineering, Pukyong University) ;
  • Kim, H.J. (Division of Materials Science & Engineering, Pukyong University) ;
  • Kim, M.G. (Division of Materials Science & Engineering, Pukyong University) ;
  • Oh, I.S. (Division of Materials Science & Engineering, Pukyong University) ;
  • Kim, D.S. (Youvella Co., Ltd.)
  • 정병호 (부경대학교 신소재공학부 금속공학과) ;
  • 김헌주 (부경대학교 신소재공학부 금속공학과) ;
  • 김무길 (부경대학교 신소재공학부 금속공학과) ;
  • 오이식 (부경대학교 신소재공학부 금속공학과) ;
  • 김동섭 ((주)유벨라)
  • Received : 2003.12.24
  • Published : 2004.01.30
Download PDF
⟨ Previous Next ⟩

Abstract

The effect of low tempering in a temperature range of $150{\sim}400^{\circ}C$ on corrosion resistance in 420J2 stainless steel austenitized at $1000^{\circ}C$ was investigated by the application of salt spray test, electrochemical pitting test in 3.5% NaCl solution and DL-EPR test for intergranular corrosion in 0.5M $H_2SO_4$+0.01M KSCN solution. In salt spray test, good corrosion resistance was obtained in a tempering temperature range of $150{\sim}250^{\circ}C$. Pitting potential was increased to the tempering temperature of $250^{\circ}C$, but decreased with the increase of temperature up to $400^{\circ}C$ And it was thought that the degradation of pitting corrosion resistance showed at the tempering temperature of around $400^{\circ}C$ was due to the precipitation of $Cr_7C_3$ of $M_7C_3$ type. The degree of sensitization showed increasing tendency with the increase of tempering temperature, and also Cr depletion phenomena were observed in the vicinity of grain boundary.

Keywords

References

  1. 日本鐵鋼協會編 : 鋼의 熱處理, 機電硏究社, (1979) 563-568
  2. ASM International Handbook Committee : Stainless Steel, ASM International Materials Park, (1996) 17-18
  3. 日本熱處理技術協會編 : 特殊鋼の熱處理, 日刊工業, No.4, (1970) 233-235
  4. Y. G. Kim et al : J. of the Korean Society for Heat Treatment, 5(1992) 117
  5. 長谷川正義 : 스테인리스鋼 便覽, 世和, (1992) 45-46
  6. 中野平, 橫山忠正, 川谷洋司 : 鐵 と 鋼, 62(1979) 1239
  7. Y. G. Kim et al : J. of the Korean Society for Heat Treatment, 7(1994) 33
  8. J. J Hauser et al : Trans. ASM., 54(1961) 514-525
  9. Y. T. Jeon and Y. S. Park : J. Corros Sci. Soc. of Korea, 26(1997) 368-380
  10. 한국공업 표준협회 : KS 핸드북(철강), KSD 9502 (1987) 192-197
  11. Z. Szklarska-Smialowska : Pitting Corrosion of Metals, National Association of Corrosion Engineering (1986) 43
  12. P. Novak, S. Stefee and F. Franz : Corrosion, 31 (1975) 344
  13. H. P. Kim, S. S. Hwang : J. Corros. Sci. Soc. of Korea, 27(1998) 52-64
  14. 長谷川正義 : 스테인리스鋼 便覽, 世和, (1992) 36
  15. F. B. Pickering et al : International Metals Review, December, (1964) 63-77
  16. K. M. Moon : J. Corros. Sci. Soc. of Korea, 18(1989) 3-11
  17. M. F. Maday, A. Mignone and M. Vittori : Corros. Sci, 28 (1988) 887
  18. M. K. Ahan et al : J. Corros. Sci. Soc. of Korea, 22(1993) 166-175