Korean Journal of Materials Research (한국재료학회지)

Materials Research Society of Korea (한국재료학회)
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Effect of Carbides on the Pitting Corrosion of Mod. 440A Martensitic Stainless Steel

Mod. 440A 마르텐사이트계 스텐인리스강의 공식에 미치는 탄화물의 영향

  • Kwon, Soon-Doo (Department of Metallurgical Engineering, Pukyong National University) ;
  • Heo, Sung-Hwa (Department of Metallurgical Engineering, Pukyong National University) ;
  • Kang, Chang-Yong (Department of Metallurgical Engineering, Pukyong National University)
  • 권순두 (부경대학교 금속공학과) ;
  • 허성화 (부경대학교 금속공학과) ;
  • 강창룡 (부경대학교 금속공학과)
  • Received : 2015.08.27
  • Accepted : 2015.10.21
  • Published : 2015.12.27
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Abstract

In this study, we investigated the effect of the residual carbides and tempered carbides precipitated by tempering treatment after quenching on the pitting corrosion of mod. 440A martensitic stainless steel. In quenched specimens and tempered specimens after quenching of mod. 440A martensitic stainless steel, the volume fraction of the residual carbides and total carbides decreased with the increase of the austenitizing temperature. Pitting resistance increased with the increase of austenitizing temperature. With the increase of the volume fraction of the residual and total carbides, the pitting resistance of mod. 440A martensitic stainless steel was decreased. The pitting resistance of mod. 0.5C-17Cr-0.5Ni 440A martensitic stainless steel had stronger affected by residual carbides than precipitated carbides produced by tempering.

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